./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:07:54,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:07:54,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:07:54,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:07:54,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:07:54,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:07:54,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:07:54,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:07:54,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:07:54,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:07:54,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:07:54,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:07:54,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:07:54,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:07:54,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:07:54,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:07:54,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:07:54,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:07:54,169 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:07:54,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:07:54,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:07:54,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:07:54,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:07:54,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:07:54,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:07:54,184 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:07:54,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:07:54,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:07:54,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:07:54,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:07:54,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:07:54,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:07:54,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:07:54,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:07:54,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:07:54,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:07:54,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:07:54,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:07:54,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:07:54,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:07:54,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:07:54,196 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:07:54,216 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:07:54,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:07:54,216 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:07:54,216 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:07:54,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:07:54,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:07:54,217 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:07:54,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:07:54,218 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:07:54,218 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:07:54,218 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:07:54,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:07:54,218 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:07:54,218 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:07:54,218 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:07:54,219 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:07:54,219 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:07:54,219 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:07:54,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:07:54,220 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:07:54,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:07:54,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:07:54,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:07:54,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:07:54,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:07:54,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:07:54,221 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:07:54,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:07:54,221 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:07:54,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:07:54,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:07:54,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:07:54,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:07:54,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:07:54,222 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:07:54,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:07:54,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:07:54,223 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:07:54,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:07:54,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:07:54,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:07:54,223 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_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2022-12-14 09:07:54,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:07:54,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:07:54,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:07:54,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:07:54,432 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:07:54,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/reducercommutativity/sep.i [2022-12-14 09:07:56,928 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:07:57,093 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:07:57,094 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/sv-benchmarks/c/reducercommutativity/sep.i [2022-12-14 09:07:57,099 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/data/eaac051fb/5b830c5ba5ae4399adcab59ef677081c/FLAG60c8d63c5 [2022-12-14 09:07:57,495 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/data/eaac051fb/5b830c5ba5ae4399adcab59ef677081c [2022-12-14 09:07:57,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:07:57,501 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:07:57,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:07:57,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:07:57,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:07:57,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5ce99c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57, skipping insertion in model container [2022-12-14 09:07:57,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:07:57,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:07:57,659 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_6c9443e6-d18d-49b3-96a2-cecbc06c4866/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2022-12-14 09:07:57,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:07:57,669 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:07:57,685 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_6c9443e6-d18d-49b3-96a2-cecbc06c4866/sv-benchmarks/c/reducercommutativity/sep.i[1298,1311] [2022-12-14 09:07:57,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:07:57,697 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:07:57,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57 WrapperNode [2022-12-14 09:07:57,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:07:57,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:07:57,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:07:57,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:07:57,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,725 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-12-14 09:07:57,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:07:57,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:07:57,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:07:57,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:07:57,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:07:57,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:07:57,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:07:57,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:07:57,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (1/1) ... [2022-12-14 09:07:57,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:07:57,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:57,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:07:57,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:07:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:07:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:07:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:07:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:07:57,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:07:57,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:07:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:07:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:07:57,801 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-12-14 09:07:57,801 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-12-14 09:07:57,862 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:07:57,863 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:07:57,974 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:07:58,028 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:07:58,028 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 09:07:58,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:07:58 BoogieIcfgContainer [2022-12-14 09:07:58,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:07:58,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:07:58,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:07:58,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:07:58,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:07:57" (1/3) ... [2022-12-14 09:07:58,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d76c6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:07:58, skipping insertion in model container [2022-12-14 09:07:58,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:07:57" (2/3) ... [2022-12-14 09:07:58,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d76c6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:07:58, skipping insertion in model container [2022-12-14 09:07:58,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:07:58" (3/3) ... [2022-12-14 09:07:58,038 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2022-12-14 09:07:58,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:07:58,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:07:58,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:07:58,102 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;@a4d589b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:07:58,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:07:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 09:07:58,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 09:07:58,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:58,118 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:58,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:07:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1650253394, now seen corresponding path program 1 times [2022-12-14 09:07:58,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:58,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274630436] [2022-12-14 09:07:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:58,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 09:07:58,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:58,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274630436] [2022-12-14 09:07:58,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274630436] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:07:58,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089791887] [2022-12-14 09:07:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:58,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:58,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:58,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:58,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:07:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:58,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:07:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 09:07:58,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:07:58,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089791887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:58,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:07:58,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-12-14 09:07:58,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526857585] [2022-12-14 09:07:58,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:58,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:07:58,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:07:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:07:58,574 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 09:07:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:58,625 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-12-14 09:07:58,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:07:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2022-12-14 09:07:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:58,632 INFO L225 Difference]: With dead ends: 36 [2022-12-14 09:07:58,632 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 09:07:58,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:07:58,636 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:58,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:07:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 09:07:58,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 09:07:58,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 09:07:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-12-14 09:07:58,660 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 20 [2022-12-14 09:07:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:58,660 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-12-14 09:07:58,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 09:07:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-12-14 09:07:58,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:07:58,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:58,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:58,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:07:58,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 09:07:58,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:07:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:58,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1140555386, now seen corresponding path program 1 times [2022-12-14 09:07:58,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:58,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096441902] [2022-12-14 09:07:58,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:58,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 09:07:59,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:59,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096441902] [2022-12-14 09:07:59,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096441902] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:59,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:59,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:59,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317854219] [2022-12-14 09:07:59,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:59,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:07:59,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:59,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:07:59,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:07:59,042 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 09:07:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:59,066 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-12-14 09:07:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:07:59,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-12-14 09:07:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:59,067 INFO L225 Difference]: With dead ends: 26 [2022-12-14 09:07:59,067 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 09:07:59,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:07:59,068 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:59,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:07:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 09:07:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 09:07:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 09:07:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-12-14 09:07:59,072 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 23 [2022-12-14 09:07:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:59,073 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-12-14 09:07:59,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 09:07:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-12-14 09:07:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:07:59,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:59,074 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:59,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:07:59,074 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:07:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425358, now seen corresponding path program 1 times [2022-12-14 09:07:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:59,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382927825] [2022-12-14 09:07:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:59,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:07:59,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:59,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382927825] [2022-12-14 09:07:59,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382927825] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:07:59,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361216752] [2022-12-14 09:07:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:59,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:59,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:59,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:59,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:07:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:59,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:07:59,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:07:59,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 09:07:59,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361216752] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:07:59,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1318746393] [2022-12-14 09:07:59,391 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:07:59,392 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:07:59,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:07:59,398 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:07:59,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:07:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:59,472 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-12-14 09:07:59,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-12-14 09:07:59,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:59,505 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:07:59,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 09:07:59,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:07:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:59,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:59,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:59,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:07:59,758 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-12-14 09:07:59,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-12-14 09:08:00,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:08:00,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 09:08:00,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:08:00,100 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 09:08:00,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 83 [2022-12-14 09:08:00,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 09:08:00,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:08:00,353 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-12-14 09:08:00,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:08:05,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '373#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= |#NULL.base| 0) (exists ((v_sep_~ret~0_BEFORE_RETURN_5 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) (+ (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) (- 4294967296))))) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 09:08:05,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:08:05,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:08:05,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2022-12-14 09:08:05,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991052468] [2022-12-14 09:08:05,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:08:05,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:08:05,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:05,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:08:05,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:08:05,673 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:08:05,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:05,710 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-12-14 09:08:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:08:05,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 24 [2022-12-14 09:08:05,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:05,711 INFO L225 Difference]: With dead ends: 32 [2022-12-14 09:08:05,711 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 09:08:05,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:08:05,713 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:05,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:08:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 09:08:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 09:08:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 09:08:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-12-14 09:08:05,716 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 24 [2022-12-14 09:08:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:05,716 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-12-14 09:08:05,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:08:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-12-14 09:08:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 09:08:05,717 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:05,717 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:05,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:08:05,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:05,919 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:08:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2012504714, now seen corresponding path program 2 times [2022-12-14 09:08:05,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:05,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822329746] [2022-12-14 09:08:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:05,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 09:08:11,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:11,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822329746] [2022-12-14 09:08:11,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822329746] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:08:11,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742322787] [2022-12-14 09:08:11,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:08:11,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:11,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:08:11,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:08:11,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:08:11,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 09:08:11,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:08:11,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-14 09:08:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:08:12,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:08:12,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:08:12,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 73 [2022-12-14 09:08:13,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:08:14,514 INFO L321 Elim1Store]: treesize reduction 540, result has 29.0 percent of original size [2022-12-14 09:08:14,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 53 case distinctions, treesize of input 276 treesize of output 391 [2022-12-14 09:08:48,330 WARN L233 SmtUtils]: Spent 19.65s on a formula simplification. DAG size of input: 234 DAG size of output: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:08:48,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:08:48,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:08:49,600 INFO L321 Elim1Store]: treesize reduction 340, result has 59.5 percent of original size [2022-12-14 09:08:49,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 2 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 383 treesize of output 759 [2022-12-14 09:10:05,028 WARN L233 SmtUtils]: Spent 28.67s on a formula simplification. DAG size of input: 367 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:10:06,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:10:06,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 288 treesize of output 352 [2022-12-14 09:10:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:10:10,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:10:10,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742322787] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:10,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754409120] [2022-12-14 09:10:10,820 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:10:10,820 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:10:10,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:10:10,820 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:10:10,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:10:10,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,849 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:10:10,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 09:10:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-12-14 09:10:10,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:10:10,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:10:10,956 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-12-14 09:10:10,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-12-14 09:10:11,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:11,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:10:11,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 09:10:11,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:11,151 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 09:10:11,151 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 09:10:11,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 09:10:11,178 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:10:11,273 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-12-14 09:10:11,301 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:10:17,518 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '595#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_sep_~ret~0_BEFORE_RETURN_12 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_12 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_12 4294967296) (+ (mod v_sep_~ret~0_BEFORE_RETURN_12 4294967296) (- 4294967296))))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:10:17,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:10:17,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:10:17,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 41 [2022-12-14 09:10:17,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151055185] [2022-12-14 09:10:17,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:10:17,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 09:10:17,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:17,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 09:10:17,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 09:10:17,523 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 41 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 09:10:19,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:10:21,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:10:27,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:10:35,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:10:36,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:10:38,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:10:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:39,240 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2022-12-14 09:10:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 09:10:39,241 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-12-14 09:10:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:39,243 INFO L225 Difference]: With dead ends: 51 [2022-12-14 09:10:39,243 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 09:10:39,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 69.7s TimeCoverageRelationStatistics Valid=354, Invalid=3936, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 09:10:39,245 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 30 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:39,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 129 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 690 Invalid, 6 Unknown, 0 Unchecked, 11.3s Time] [2022-12-14 09:10:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 09:10:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-12-14 09:10:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 09:10:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2022-12-14 09:10:39,255 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 27 [2022-12-14 09:10:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:39,255 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2022-12-14 09:10:39,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 09:10:39,255 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2022-12-14 09:10:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 09:10:39,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:39,256 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:39,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:10:39,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:39,458 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1934707082, now seen corresponding path program 3 times [2022-12-14 09:10:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:39,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781265587] [2022-12-14 09:10:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:39,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 09:10:39,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781265587] [2022-12-14 09:10:39,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781265587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291875198] [2022-12-14 09:10:39,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:10:39,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:39,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:39,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:39,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:10:39,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:10:39,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:10:39,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 09:10:39,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 09:10:39,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:10:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 09:10:39,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291875198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:10:39,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458660632] [2022-12-14 09:10:39,791 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:10:39,791 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:10:39,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:10:39,792 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:10:39,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:10:39,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:39,825 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-12-14 09:10:39,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-12-14 09:10:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:39,849 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:10:39,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 09:10:39,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:10:39,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:39,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:39,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:39,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:39,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:10:39,961 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-12-14 09:10:39,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-12-14 09:10:40,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:40,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:10:40,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 09:10:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:40,172 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 09:10:40,172 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 09:10:40,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 09:10:40,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:10:40,311 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-12-14 09:10:40,340 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:10:45,704 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '942#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (exists ((v_sep_~ret~0_BEFORE_RETURN_18 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_18 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_18 4294967296) (+ (mod v_sep_~ret~0_BEFORE_RETURN_18 4294967296) (- 4294967296))))) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:10:45,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:10:45,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:10:45,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 17 [2022-12-14 09:10:45,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420295100] [2022-12-14 09:10:45,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:10:45,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 09:10:45,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:45,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 09:10:45,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-12-14 09:10:45,706 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:10:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:45,944 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2022-12-14 09:10:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 09:10:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 28 [2022-12-14 09:10:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:45,945 INFO L225 Difference]: With dead ends: 62 [2022-12-14 09:10:45,945 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 09:10:45,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 09:10:45,946 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:45,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 118 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:10:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 09:10:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2022-12-14 09:10:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 09:10:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 09:10:45,950 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 28 [2022-12-14 09:10:45,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:45,950 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 09:10:45,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:10:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 09:10:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 09:10:45,951 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:45,951 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:45,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:10:46,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:46,153 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:10:46,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:46,154 INFO L85 PathProgramCache]: Analyzing trace with hash -81417082, now seen corresponding path program 4 times [2022-12-14 09:10:46,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:46,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888887844] [2022-12-14 09:10:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:46,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 63 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:10:57,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888887844] [2022-12-14 09:10:57,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888887844] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955152399] [2022-12-14 09:10:57,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:10:57,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:57,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:57,225 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:57,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:10:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:57,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-14 09:10:57,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:58,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:58,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:58,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:58,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:10:58,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 349 treesize of output 202 [2022-12-14 09:11:00,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:00,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:11:00,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:00,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:11:00,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:00,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:11:00,991 INFO L321 Elim1Store]: treesize reduction 6, result has 14.3 percent of original size [2022-12-14 09:11:00,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 548 treesize of output 367 [2022-12-14 09:11:01,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:01,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:11:01,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:01,750 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-12-14 09:11:01,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 477 treesize of output 344 [2022-12-14 09:11:02,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:11:02,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:11:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:02,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:11:02,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 455 treesize of output 362 [2022-12-14 09:11:05,406 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| Int)) (let ((.cse0 (* |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| 4))) (and (< .cse0 4) (<= 0 .cse0) (exists ((|aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65| Int)) (and (<= (+ |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65|) 0) (< 0 (+ |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65| 1)) (exists ((|v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_31| Int)) (let ((.cse1 (+ (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_31|) (+ (* (- 4) |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65|) (* |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| (- 4)) 4)) 1))) (<= .cse1 (* (div .cse1 2) 2))))))))) (exists ((|aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| Int)) (let ((.cse2 (* |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| 4))) (and (< .cse2 4) (<= 0 .cse2) (exists ((|aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65| Int)) (and (<= (+ |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65|) 0) (< 0 (+ |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65| 1)) (exists ((|v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_31| Int)) (let ((.cse3 (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#x~0#1.base_BEFORE_CALL_31|) (+ (* (- 4) |aux_div_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65|) (* |aux_div_aux_mod_v_ULTIMATE.start_main_~#x~0#1.offset_BEFORE_CALL_33_65_72| (- 4)) 4)))) (<= .cse3 (* (div .cse3 2) 2)))))))))) is different from true [2022-12-14 09:11:15,649 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:11:28,853 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:11:42,259 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:11:55,050 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:12:05,770 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:12:05,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:05,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:05,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:06,108 INFO L321 Elim1Store]: treesize reduction 47, result has 79.7 percent of original size [2022-12-14 09:12:06,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1128 treesize of output 684 [2022-12-14 09:12:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-14 09:12:06,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:12:30,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1108 treesize of output 916 [2022-12-14 09:12:30,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:12:30,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 712 treesize of output 1 [2022-12-14 09:12:42,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:12:42,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4379 treesize of output 3667 [2022-12-14 09:12:48,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:12:48,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 2848 treesize of output 2373 [2022-12-14 09:12:53,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:53,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:53,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:53,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:53,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:53,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2849 treesize of output 2257 [2022-12-14 09:12:54,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:54,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:54,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2836 treesize of output 2292 [2022-12-14 09:12:54,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 2304 treesize of output 2256 [2022-12-14 09:12:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 09:12:54,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955152399] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:12:54,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1005017696] [2022-12-14 09:12:54,442 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:12:54,442 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:12:54,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:12:54,442 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:12:54,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:12:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:54,467 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:12:54,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 09:12:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:54,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-12-14 09:12:54,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:54,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:54,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:54,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:54,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:54,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:54,582 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-12-14 09:12:54,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-12-14 09:12:54,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:54,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 09:12:54,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:54,797 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 09:12:54,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 83 [2022-12-14 09:12:54,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 09:12:54,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:12:54,951 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 82 for LOIs [2022-12-14 09:12:54,978 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:12:58,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1363#(and (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= ~N~0 2147483647) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~ret5~0#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret5~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:12:58,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:12:58,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:12:58,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 28, 26] total 70 [2022-12-14 09:12:58,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507091575] [2022-12-14 09:12:58,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:12:58,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 09:12:58,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:58,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 09:12:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=6121, Unknown=11, NotChecked=158, Total=6642 [2022-12-14 09:12:58,322 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 70 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 60 states have internal predecessors, (67), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-12-14 09:13:00,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:02,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:04,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:06,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:08,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:10,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:18,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:20,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:22,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:24,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:28,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:30,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 09:13:44,126 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 217 DAG size of output: 163 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:14:30,600 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:14:39,147 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:14:55,461 WARN L233 SmtUtils]: Spent 16.08s on a formula simplification. DAG size of input: 73 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:15:11,787 WARN L233 SmtUtils]: Spent 16.12s on a formula simplification. DAG size of input: 92 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:15:32,210 WARN L233 SmtUtils]: Spent 16.19s on a formula simplification. DAG size of input: 118 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:15:50,859 WARN L233 SmtUtils]: Spent 16.43s on a formula simplification. DAG size of input: 162 DAG size of output: 114 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:16:00,221 WARN L233 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 233 DAG size of output: 177 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:16:09,511 WARN L233 SmtUtils]: Spent 6.63s on a formula simplification. DAG size of input: 233 DAG size of output: 177 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:16:10,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:10,544 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2022-12-14 09:16:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 09:16:10,544 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 60 states have internal predecessors, (67), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 31 [2022-12-14 09:16:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:10,545 INFO L225 Difference]: With dead ends: 64 [2022-12-14 09:16:10,545 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 09:16:10,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 97 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3343 ImplicationChecksByTransitivity, 249.3s TimeCoverageRelationStatistics Valid=593, Invalid=8877, Unknown=40, NotChecked=192, Total=9702 [2022-12-14 09:16:10,547 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 44 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 30.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:10,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 125 Invalid, 1626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1520 Invalid, 12 Unknown, 50 Unchecked, 30.0s Time] [2022-12-14 09:16:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 09:16:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-12-14 09:16:10,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 09:16:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-12-14 09:16:10,564 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 31 [2022-12-14 09:16:10,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:10,565 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-12-14 09:16:10,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 60 states have internal predecessors, (67), 8 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-12-14 09:16:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-12-14 09:16:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 09:16:10,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:10,565 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:10,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:16:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 09:16:10,767 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1668881530, now seen corresponding path program 5 times [2022-12-14 09:16:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:10,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782114798] [2022-12-14 09:16:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 27 proven. 47 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 09:16:10,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:10,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782114798] [2022-12-14 09:16:10,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782114798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:16:10,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868922046] [2022-12-14 09:16:10,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:16:10,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:10,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:10,879 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:10,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:16:10,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:16:10,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:16:10,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:16:10,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:16:10,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:16:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 52 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 09:16:11,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868922046] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:16:11,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [262919567] [2022-12-14 09:16:11,102 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:16:11,103 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:16:11,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:16:11,103 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:16:11,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:16:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:11,130 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-12-14 09:16:11,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-12-14 09:16:11,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:11,150 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:16:11,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 09:16:11,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:11,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:11,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:11,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:11,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:11,256 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-12-14 09:16:11,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-12-14 09:16:11,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:11,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:11,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 09:16:11,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:11,453 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 09:16:11,453 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 09:16:11,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 09:16:11,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:16:11,585 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-12-14 09:16:11,612 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:16:16,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1801#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (exists ((v_sep_~ret~0_BEFORE_RETURN_30 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_30 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_30 4294967296) (+ (mod v_sep_~ret~0_BEFORE_RETURN_30 4294967296) (- 4294967296))))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:16:16,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:16:16,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:16:16,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 22 [2022-12-14 09:16:16,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110417902] [2022-12-14 09:16:16,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:16:16,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 09:16:16,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:16,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 09:16:16,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:16:16,996 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:16:17,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:17,307 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-12-14 09:16:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 09:16:17,308 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 32 [2022-12-14 09:16:17,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:17,308 INFO L225 Difference]: With dead ends: 79 [2022-12-14 09:16:17,308 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 09:16:17,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=337, Invalid=2419, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 09:16:17,309 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:17,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 211 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 09:16:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-12-14 09:16:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 35 states have internal predecessors, (40), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 09:16:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-12-14 09:16:17,326 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 32 [2022-12-14 09:16:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:17,326 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-12-14 09:16:17,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:16:17,326 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-12-14 09:16:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 09:16:17,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:17,327 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:17,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:16:17,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 09:16:17,528 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:17,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:17,529 INFO L85 PathProgramCache]: Analyzing trace with hash -847079546, now seen corresponding path program 6 times [2022-12-14 09:16:17,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:17,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410307771] [2022-12-14 09:16:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:17,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:16:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 09:16:17,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:16:17,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410307771] [2022-12-14 09:16:17,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410307771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:16:17,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763319659] [2022-12-14 09:16:17,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:16:17,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:17,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:16:17,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:16:17,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:16:17,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:16:17,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:16:17,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:16:17,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:16:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 58 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 09:16:17,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:16:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 09:16:18,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763319659] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:16:18,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [302840358] [2022-12-14 09:16:18,108 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:16:18,108 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:16:18,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:16:18,108 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:16:18,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:16:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:18,132 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-12-14 09:16:18,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-12-14 09:16:18,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:18,152 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:16:18,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 09:16:18,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:18,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:18,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:18,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:18,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:18,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:16:18,253 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-12-14 09:16:18,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-12-14 09:16:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:18,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-12-14 09:16:18,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:16:18,454 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-12-14 09:16:18,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 83 [2022-12-14 09:16:18,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 09:16:18,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:16:18,601 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-12-14 09:16:18,629 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:16:21,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2292#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (exists ((v_sep_~ret~0_BEFORE_RETURN_35 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_sep_~ret~0_BEFORE_RETURN_35 4294967296) 2147483647) (mod v_sep_~ret~0_BEFORE_RETURN_35 4294967296) (+ (mod v_sep_~ret~0_BEFORE_RETURN_35 4294967296) (- 4294967296))))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:16:21,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:16:21,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:16:21,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 28 [2022-12-14 09:16:21,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886340945] [2022-12-14 09:16:21,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:16:21,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 09:16:21,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:16:21,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 09:16:21,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 09:16:21,998 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 09:16:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:16:22,293 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2022-12-14 09:16:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 09:16:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2022-12-14 09:16:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:16:22,295 INFO L225 Difference]: With dead ends: 91 [2022-12-14 09:16:22,295 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 09:16:22,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=492, Invalid=2814, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 09:16:22,296 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:16:22,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 91 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:16:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 09:16:22,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2022-12-14 09:16:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 09:16:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-12-14 09:16:22,305 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 35 [2022-12-14 09:16:22,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:16:22,305 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-12-14 09:16:22,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 09:16:22,305 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-12-14 09:16:22,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 09:16:22,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:16:22,306 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:16:22,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 09:16:22,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:16:22,508 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:16:22,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:16:22,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2032146550, now seen corresponding path program 7 times [2022-12-14 09:16:22,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:16:22,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517191234] [2022-12-14 09:16:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:16:22,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:16:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:17:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:17:10,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:17:10,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517191234] [2022-12-14 09:17:10,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517191234] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:17:10,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057628254] [2022-12-14 09:17:10,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:17:10,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:17:10,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:17:10,642 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:17:10,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c9443e6-d18d-49b3-96a2-cecbc06c4866/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:17:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:17:10,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 122 conjunts are in the unsatisfiable core [2022-12-14 09:17:10,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:17:12,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:12,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:12,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:12,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:17:12,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 459 treesize of output 303 [2022-12-14 09:17:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:17,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:17,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:17,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:17,243 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-12-14 09:17:17,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 880 treesize of output 597 [2022-12-14 09:17:18,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:18,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:18,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:18,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:18,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:18,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:18,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:18,280 INFO L321 Elim1Store]: treesize reduction 4, result has 42.9 percent of original size [2022-12-14 09:17:18,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 793 treesize of output 600 [2022-12-14 09:17:19,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:19,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:17:19,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 739 treesize of output 574 [2022-12-14 09:17:20,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:17:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:20,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:20,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:20,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:17:20,587 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:17:20,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 736 treesize of output 586 [2022-12-14 09:17:23,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:17:23,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1165 treesize of output 805 [2022-12-14 09:17:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 5 proven. 106 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:17:24,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:19:36,285 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 417 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:19:40,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2931 treesize of output 2401 [2022-12-14 09:19:40,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:19:40,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1569 treesize of output 1 [2022-12-14 09:20:05,108 WARN L233 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 316 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:20:30,287 WARN L233 SmtUtils]: Spent 9.86s on a formula simplification that was a NOOP. DAG size: 402 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:20:47,086 WARN L233 SmtUtils]: Spent 12.11s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 09:20:47,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:20:47,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24723 treesize of output 20555 [2022-12-14 09:21:38,092 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:21:38,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 13736 treesize of output 10936 [2022-12-14 09:21:38,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:21:38,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 10948 treesize of output 10844 [2022-12-14 09:21:40,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:21:40,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 13748 treesize of output 11054 [2022-12-14 09:22:27,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:27,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:27,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:27,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:27,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:27,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:27,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 13749 treesize of output 10845 [2022-12-14 09:22:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 6 proven. 108 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 09:22:29,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057628254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:29,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663688788] [2022-12-14 09:22:29,042 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:22:29,042 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:22:29,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:22:29,042 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:22:29,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:22:29,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:29,066 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:22:29,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 09:22:29,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:29,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-12-14 09:22:29,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:29,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:29,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:29,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:29,170 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-12-14 09:22:29,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-12-14 09:22:29,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:29,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:29,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-12-14 09:22:29,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:29,358 INFO L321 Elim1Store]: treesize reduction 45, result has 6.3 percent of original size [2022-12-14 09:22:29,358 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 3 case distinctions, treesize of input 80 treesize of output 72 [2022-12-14 09:22:29,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-12-14 09:22:29,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 09:22:29,481 INFO L197 IcfgInterpreter]: Interpreting procedure sep with input of size 17 for LOIs [2022-12-14 09:22:29,505 INFO L180 IcfgInterpreter]: Interpretation finished