./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur --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 09dc663f7f76eee13b6af61297831e3fbddcb16c16389bf8d94f2d27048733d0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:12:53,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:12:53,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:12:53,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:12:53,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:12:53,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:12:53,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:12:53,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:12:53,097 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:12:53,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:12:53,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:12:53,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:12:53,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:12:53,103 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:12:53,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:12:53,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:12:53,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:12:53,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:12:53,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:12:53,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:12:53,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:12:53,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:12:53,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:12:53,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:12:53,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:12:53,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:12:53,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:12:53,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:12:53,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:12:53,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:12:53,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:12:53,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:12:53,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:12:53,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:12:53,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:12:53,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:12:53,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:12:53,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:12:53,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:12:53,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:12:53,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:12:53,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:12:53,164 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:12:53,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:12:53,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:12:53,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:12:53,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:12:53,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:12:53,169 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:12:53,169 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:12:53,170 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:12:53,170 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:12:53,171 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:12:53,172 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:12:53,172 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:12:53,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:12:53,172 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:12:53,173 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:12:53,173 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:12:53,173 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:12:53,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:12:53,174 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:12:53,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:12:53,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:12:53,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:12:53,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:12:53,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:12:53,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:12:53,177 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:12:53,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:12:53,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:12:53,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:12:53,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:12:53,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:12:53,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:12:53,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:12:53,179 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:12:53,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:12:53,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:12:53,180 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:12:53,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:12:53,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:12:53,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:12:53,181 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_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09dc663f7f76eee13b6af61297831e3fbddcb16c16389bf8d94f2d27048733d0 [2022-11-26 00:12:53,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:12:53,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:12:53,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:12:53,558 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:12:53,559 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:12:53,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2022-11-26 00:12:56,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:12:57,080 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:12:57,081 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2022-11-26 00:12:57,092 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/data/8e557c057/8c66a3dc57c9406e9a2254b712a60fd7/FLAG647db145d [2022-11-26 00:12:57,109 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/data/8e557c057/8c66a3dc57c9406e9a2254b712a60fd7 [2022-11-26 00:12:57,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:12:57,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:12:57,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:12:57,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:12:57,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:12:57,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab279c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57, skipping insertion in model container [2022-11-26 00:12:57,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:12:57,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:12:57,328 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/sv-benchmarks/c/array-industry-pattern/array_mul_init.i[807,820] [2022-11-26 00:12:57,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:12:57,357 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:12:57,371 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/sv-benchmarks/c/array-industry-pattern/array_mul_init.i[807,820] [2022-11-26 00:12:57,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:12:57,394 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:12:57,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57 WrapperNode [2022-11-26 00:12:57,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:12:57,396 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:12:57,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:12:57,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:12:57,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,441 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2022-11-26 00:12:57,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:12:57,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:12:57,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:12:57,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:12:57,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,465 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:12:57,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:12:57,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:12:57,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:12:57,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (1/1) ... [2022-11-26 00:12:57,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:12:57,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:57,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:12:57,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:12:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:12:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:12:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:12:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:12:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:12:57,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:12:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:12:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:12:57,639 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:12:57,641 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:12:57,798 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:12:57,861 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:12:57,862 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:12:57,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:12:57 BoogieIcfgContainer [2022-11-26 00:12:57,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:12:57,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:12:57,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:12:57,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:12:57,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:12:57" (1/3) ... [2022-11-26 00:12:57,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ca83d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:12:57, skipping insertion in model container [2022-11-26 00:12:57,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:12:57" (2/3) ... [2022-11-26 00:12:57,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ca83d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:12:57, skipping insertion in model container [2022-11-26 00:12:57,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:12:57" (3/3) ... [2022-11-26 00:12:57,881 INFO L112 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2022-11-26 00:12:57,918 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:12:57,918 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:12:57,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:12:57,978 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;@15a755b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:12:57,979 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:12:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:12:57,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:57,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:12:57,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:57,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1244850581, now seen corresponding path program 1 times [2022-11-26 00:12:58,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:58,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346967621] [2022-11-26 00:12:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:58,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:58,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346967621] [2022-11-26 00:12:58,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-26 00:12:58,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787321755] [2022-11-26 00:12:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:58,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:58,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:58,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:58,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:12:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:12:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:58,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:12:58,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787321755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:58,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:12:58,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:12:58,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263827420] [2022-11-26 00:12:58,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:58,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:12:58,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:12:58,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:12:58,476 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:58,567 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-11-26 00:12:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:12:58,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:12:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:58,608 INFO L225 Difference]: With dead ends: 23 [2022-11-26 00:12:58,610 INFO L226 Difference]: Without dead ends: 15 [2022-11-26 00:12:58,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:12:58,639 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:58,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:12:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-26 00:12:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-11-26 00:12:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-26 00:12:58,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-26 00:12:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:58,676 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-26 00:12:58,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-26 00:12:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:12:58,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:58,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:58,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:58,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:12:58,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:58,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1704292246, now seen corresponding path program 1 times [2022-11-26 00:12:58,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:58,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792425269] [2022-11-26 00:12:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:58,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:58,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:58,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792425269] [2022-11-26 00:12:58,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-26 00:12:58,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935007383] [2022-11-26 00:12:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:58,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:58,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:58,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:58,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:12:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:59,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:12:59,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:12:59,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:12:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:12:59,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935007383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:59,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289636303] [2022-11-26 00:12:59,172 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:12:59,173 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:59,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:59,189 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:59,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:59,348 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-26 00:12:59,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-26 00:12:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:59,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:59,435 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:12:59,436 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 53 [2022-11-26 00:12:59,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:59,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:59,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 00:12:59,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:59,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:59,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:59,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:59,866 INFO L321 Elim1Store]: treesize reduction 249, result has 16.2 percent of original size [2022-11-26 00:12:59,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 272 treesize of output 268 [2022-11-26 00:13:00,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:00,211 INFO L321 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2022-11-26 00:13:00,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-11-26 00:13:00,286 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-26 00:13:00,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2022-11-26 00:13:00,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:00,404 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-26 00:13:00,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-26 00:13:00,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:00,518 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-26 00:13:00,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-26 00:13:00,672 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:00,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:13:00,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:13:00,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:13:00,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-26 00:13:00,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635782249] [2022-11-26 00:13:00,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:00,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:13:00,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:00,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:13:00,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:13:00,988 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:01,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:01,064 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-11-26 00:13:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:13:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:13:01,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:01,066 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:13:01,066 INFO L226 Difference]: Without dead ends: 32 [2022-11-26 00:13:01,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:13:01,069 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:01,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:13:01,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-26 00:13:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2022-11-26 00:13:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2022-11-26 00:13:01,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-26 00:13:01,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-26 00:13:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:01,076 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-26 00:13:01,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:01,076 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-26 00:13:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:13:01,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:01,077 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:01,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:01,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:01,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2029215189, now seen corresponding path program 2 times [2022-11-26 00:13:01,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:01,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397524623] [2022-11-26 00:13:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:01,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:01,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:13:01,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309768473] [2022-11-26 00:13:01,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:13:01,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:01,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:01,395 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:01,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:13:01,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:13:01,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:01,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:13:01,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:13:01,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:13:01,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:01,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397524623] [2022-11-26 00:13:01,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:13:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309768473] [2022-11-26 00:13:01,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309768473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:01,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1657804497] [2022-11-26 00:13:01,701 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:13:01,701 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:13:01,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:13:01,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:13:01,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:13:01,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:01,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:01,777 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-26 00:13:01,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-26 00:13:01,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:01,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:01,860 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:13:01,864 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 53 [2022-11-26 00:13:01,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:01,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:01,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-11-26 00:13:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:02,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:02,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:02,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:02,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:02,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:02,075 INFO L321 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2022-11-26 00:13:02,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 286 treesize of output 270 [2022-11-26 00:13:02,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:02,177 INFO L321 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2022-11-26 00:13:02,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-11-26 00:13:02,248 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-26 00:13:02,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2022-11-26 00:13:02,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:02,327 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-26 00:13:02,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-26 00:13:02,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:02,404 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-26 00:13:02,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-26 00:13:02,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:02,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:13:02,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:13:02,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:13:02,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-26 00:13:02,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647292454] [2022-11-26 00:13:02,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:02,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:13:02,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:02,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:13:02,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:13:02,820 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:02,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:02,964 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2022-11-26 00:13:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:13:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:13:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:02,966 INFO L225 Difference]: With dead ends: 84 [2022-11-26 00:13:02,966 INFO L226 Difference]: Without dead ends: 74 [2022-11-26 00:13:02,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:13:02,968 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:02,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 30 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:13:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-26 00:13:02,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 28. [2022-11-26 00:13:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-26 00:13:02,977 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2022-11-26 00:13:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:02,977 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-26 00:13:02,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:02,978 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-26 00:13:02,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:13:02,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:02,979 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:02,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:03,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:03,188 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:03,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:03,188 INFO L85 PathProgramCache]: Analyzing trace with hash -768544821, now seen corresponding path program 3 times [2022-11-26 00:13:03,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:03,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979893219] [2022-11-26 00:13:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:03,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:03,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:13:03,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707958791] [2022-11-26 00:13:03,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:13:03,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:03,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:03,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:03,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:13:03,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:13:03,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:13:03,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-26 00:13:03,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-26 00:13:03,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:03,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979893219] [2022-11-26 00:13:03,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:13:03,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707958791] [2022-11-26 00:13:03,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707958791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:03,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [591326072] [2022-11-26 00:13:03,795 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:13:03,795 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:13:03,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:13:03,795 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:13:03,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:13:03,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,849 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:13:03,849 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 53 [2022-11-26 00:13:03,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-26 00:13:03,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-11-26 00:13:03,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:03,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:04,001 INFO L321 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2022-11-26 00:13:04,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 286 treesize of output 270 [2022-11-26 00:13:04,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:04,079 INFO L321 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2022-11-26 00:13:04,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-11-26 00:13:04,144 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-26 00:13:04,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2022-11-26 00:13:04,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:04,196 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-26 00:13:04,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-26 00:13:04,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:04,254 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-26 00:13:04,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-26 00:13:04,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:04,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '654#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:13:04,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:13:04,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:13:04,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-26 00:13:04,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395573192] [2022-11-26 00:13:04,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:04,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:13:04,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:04,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:13:04,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:13:04,597 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:04,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:04,879 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2022-11-26 00:13:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:13:04,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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 26 [2022-11-26 00:13:04,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:04,881 INFO L225 Difference]: With dead ends: 174 [2022-11-26 00:13:04,881 INFO L226 Difference]: Without dead ends: 158 [2022-11-26 00:13:04,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:13:04,883 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 228 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:04,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 66 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:13:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-26 00:13:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 52. [2022-11-26 00:13:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 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) [2022-11-26 00:13:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-11-26 00:13:04,892 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2022-11-26 00:13:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:04,893 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-11-26 00:13:04,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-11-26 00:13:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 00:13:04,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:04,894 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:04,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:05,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:05,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:05,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:05,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1049894133, now seen corresponding path program 4 times [2022-11-26 00:13:05,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:05,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316948197] [2022-11-26 00:13:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:05,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:05,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:13:05,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646754803] [2022-11-26 00:13:05,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:13:05,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:05,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:05,182 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:05,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:13:05,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:13:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-26 00:13:05,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-26 00:13:06,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316948197] [2022-11-26 00:13:06,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:13:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646754803] [2022-11-26 00:13:06,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646754803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [287658378] [2022-11-26 00:13:06,643 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:13:06,643 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:13:06,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:13:06,644 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:13:06,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:13:06,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,693 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-26 00:13:06,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-26 00:13:06,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,747 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-26 00:13:06,747 INFO L350 Elim1Store]: Elim1 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 39 treesize of output 53 [2022-11-26 00:13:06,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-11-26 00:13:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:06,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:06,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:06,908 INFO L321 Elim1Store]: treesize reduction 141, result has 13.5 percent of original size [2022-11-26 00:13:06,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 286 treesize of output 270 [2022-11-26 00:13:06,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:06,978 INFO L321 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2022-11-26 00:13:06,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-11-26 00:13:07,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:07,024 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-26 00:13:07,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-26 00:13:07,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:07,074 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-26 00:13:07,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-26 00:13:07,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:07,126 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-26 00:13:07,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2022-11-26 00:13:07,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:07,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1354#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (not (= (* |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) |ULTIMATE.start_main_#t~mem10#1|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (not (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |#NULL.base| 0))' at error location [2022-11-26 00:13:07,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:13:07,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:13:07,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-26 00:13:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744194219] [2022-11-26 00:13:07,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:07,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-26 00:13:07,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:07,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-26 00:13:07,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:13:07,518 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 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) [2022-11-26 00:13:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:08,369 INFO L93 Difference]: Finished difference Result 354 states and 405 transitions. [2022-11-26 00:13:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-26 00:13:08,369 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 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) Word has length 50 [2022-11-26 00:13:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:08,371 INFO L225 Difference]: With dead ends: 354 [2022-11-26 00:13:08,371 INFO L226 Difference]: Without dead ends: 326 [2022-11-26 00:13:08,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:13:08,374 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 684 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:08,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 138 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:13:08,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-26 00:13:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2022-11-26 00:13:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-11-26 00:13:08,389 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2022-11-26 00:13:08,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:08,389 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-11-26 00:13:08,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 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) [2022-11-26 00:13:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-11-26 00:13:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-26 00:13:08,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:08,392 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:08,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:08,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:08,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash -129816181, now seen corresponding path program 5 times [2022-11-26 00:13:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:08,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815149113] [2022-11-26 00:13:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:08,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:13:08,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079389844] [2022-11-26 00:13:08,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:13:08,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:08,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:08,795 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:08,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf345d26-a0cc-44b2-a484-703db74c8eec/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process