./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-regression/test27-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/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_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-regression/test27-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 78863f43fa37191b47f0d738bb1bc2018c82b38cb68dad85c455cdbd7fd69aa4 --- 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 08:20:59,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:20:59,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:20:59,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:20:59,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:20:59,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:20:59,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:20:59,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:20:59,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:20:59,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:20:59,160 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:20:59,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:20:59,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:20:59,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:20:59,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:20:59,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:20:59,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:20:59,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:20:59,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:20:59,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:20:59,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:20:59,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:20:59,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:20:59,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:20:59,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:20:59,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:20:59,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:20:59,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:20:59,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:20:59,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:20:59,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:20:59,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:20:59,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:20:59,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:20:59,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:20:59,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:20:59,177 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:20:59,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:20:59,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:20:59,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:20:59,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:20:59,180 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 08:20:59,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:20:59,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:20:59,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:20:59,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:20:59,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:20:59,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:20:59,197 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:20:59,197 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:20:59,197 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:20:59,197 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:20:59,197 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:20:59,197 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:20:59,198 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:20:59,198 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:20:59,198 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:20:59,198 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:20:59,198 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:20:59,199 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:20:59,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:20:59,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:20:59,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:20:59,200 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:20:59,200 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:20:59,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:20:59,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:20:59,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:20:59,200 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:20:59,201 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:20:59,201 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:20:59,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:20:59,201 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:20:59,201 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:20:59,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:20:59,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:20:59,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:20:59,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:20:59,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:20:59,202 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:20:59,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:20:59,203 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:20:59,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:20:59,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:20:59,203 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_2928743f-c45b-465b-9d27-270ae15cd254/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78863f43fa37191b47f0d738bb1bc2018c82b38cb68dad85c455cdbd7fd69aa4 [2022-12-14 08:20:59,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:20:59,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:20:59,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:20:59,385 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:20:59,386 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:20:59,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-regression/test27-1.c [2022-12-14 08:21:02,003 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:21:02,170 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:21:02,171 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/sv-benchmarks/c/ldv-regression/test27-1.c [2022-12-14 08:21:02,176 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/data/f872d9e2b/c43435e5d429463b9d5a19d87c58e804/FLAGc0f53ccb0 [2022-12-14 08:21:02,580 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/data/f872d9e2b/c43435e5d429463b9d5a19d87c58e804 [2022-12-14 08:21:02,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:21:02,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:21:02,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:21:02,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:21:02,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:21:02,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eaeb3a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02, skipping insertion in model container [2022-12-14 08:21:02,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:21:02,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:21:02,717 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_2928743f-c45b-465b-9d27-270ae15cd254/sv-benchmarks/c/ldv-regression/test27-1.c[1154,1167] [2022-12-14 08:21:02,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:21:02,726 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:21:02,739 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_2928743f-c45b-465b-9d27-270ae15cd254/sv-benchmarks/c/ldv-regression/test27-1.c[1154,1167] [2022-12-14 08:21:02,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:21:02,749 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:21:02,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02 WrapperNode [2022-12-14 08:21:02,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:21:02,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:21:02,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:21:02,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:21:02,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,773 INFO L138 Inliner]: procedures = 16, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 113 [2022-12-14 08:21:02,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:21:02,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:21:02,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:21:02,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:21:02,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,790 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:21:02,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:21:02,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:21:02,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:21:02,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (1/1) ... [2022-12-14 08:21:02,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:21:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:02,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:21:02,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:21:02,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 08:21:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:21:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:21:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 08:21:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:21:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:21:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:21:02,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:21:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:21:02,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:21:02,898 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:21:02,899 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:21:03,158 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:21:03,182 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:21:03,182 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 08:21:03,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:21:03 BoogieIcfgContainer [2022-12-14 08:21:03,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:21:03,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:21:03,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:21:03,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:21:03,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:21:02" (1/3) ... [2022-12-14 08:21:03,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5342e1da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:21:03, skipping insertion in model container [2022-12-14 08:21:03,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:21:02" (2/3) ... [2022-12-14 08:21:03,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5342e1da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:21:03, skipping insertion in model container [2022-12-14 08:21:03,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:21:03" (3/3) ... [2022-12-14 08:21:03,191 INFO L112 eAbstractionObserver]: Analyzing ICFG test27-1.c [2022-12-14 08:21:03,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:21:03,206 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-12-14 08:21:03,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:21:03,242 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@3f681f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:21:03,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-12-14 08:21:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 66 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:21:03,250 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:03,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:21:03,251 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:03,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:03,254 INFO L85 PathProgramCache]: Analyzing trace with hash 144472, now seen corresponding path program 1 times [2022-12-14 08:21:03,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:03,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193354676] [2022-12-14 08:21:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:03,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:03,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:03,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193354676] [2022-12-14 08:21:03,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193354676] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:03,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:03,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:21:03,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225105600] [2022-12-14 08:21:03,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:03,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:21:03,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:21:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:21:03,470 INFO L87 Difference]: Start difference. First operand has 67 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 66 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:03,548 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-12-14 08:21:03,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:21:03,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 08:21:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:03,555 INFO L225 Difference]: With dead ends: 64 [2022-12-14 08:21:03,555 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 08:21:03,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:21:03,559 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:03,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 27 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 08:21:03,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-14 08:21:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 28 states have (on average 2.357142857142857) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-12-14 08:21:03,583 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 3 [2022-12-14 08:21:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:03,584 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-12-14 08:21:03,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:03,584 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-12-14 08:21:03,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:21:03,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:03,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:21:03,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:21:03,585 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:03,586 INFO L85 PathProgramCache]: Analyzing trace with hash 144473, now seen corresponding path program 1 times [2022-12-14 08:21:03,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:03,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826023407] [2022-12-14 08:21:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:03,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:03,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:03,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826023407] [2022-12-14 08:21:03,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826023407] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:03,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:03,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:21:03,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011409130] [2022-12-14 08:21:03,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:03,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:21:03,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:03,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:21:03,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:21:03,736 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:03,808 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-12-14 08:21:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:21:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 08:21:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:03,810 INFO L225 Difference]: With dead ends: 68 [2022-12-14 08:21:03,810 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 08:21:03,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:21:03,811 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:03,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 83 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 08:21:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-12-14 08:21:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:03,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-12-14 08:21:03,816 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 3 [2022-12-14 08:21:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:03,816 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-12-14 08:21:03,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-12-14 08:21:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 08:21:03,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:03,816 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 08:21:03,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:21:03,817 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:03,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:03,817 INFO L85 PathProgramCache]: Analyzing trace with hash 4481810, now seen corresponding path program 1 times [2022-12-14 08:21:03,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:03,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819590613] [2022-12-14 08:21:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:03,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:03,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:03,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819590613] [2022-12-14 08:21:03,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819590613] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:03,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:03,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:21:03,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114909168] [2022-12-14 08:21:03,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:03,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:21:03,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:21:03,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:21:03,907 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:03,959 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-12-14 08:21:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:21:03,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 08:21:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:03,961 INFO L225 Difference]: With dead ends: 62 [2022-12-14 08:21:03,961 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 08:21:03,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 08:21:03,963 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 117 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:03,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 08:21:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-12-14 08:21:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-12-14 08:21:03,967 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 4 [2022-12-14 08:21:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:03,967 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-12-14 08:21:03,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-12-14 08:21:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 08:21:03,967 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:03,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 08:21:03,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:21:03,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash 4481811, now seen corresponding path program 1 times [2022-12-14 08:21:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:03,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759787747] [2022-12-14 08:21:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:03,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:04,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:04,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759787747] [2022-12-14 08:21:04,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759787747] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:04,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:04,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:21:04,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857246152] [2022-12-14 08:21:04,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:04,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:21:04,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:04,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:21:04,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:21:04,084 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:04,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:04,172 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-12-14 08:21:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:21:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 08:21:04,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:04,173 INFO L225 Difference]: With dead ends: 63 [2022-12-14 08:21:04,173 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 08:21:04,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 08:21:04,174 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:04,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 101 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:04,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 08:21:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-14 08:21:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 31 states have (on average 2.129032258064516) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-12-14 08:21:04,180 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 4 [2022-12-14 08:21:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:04,180 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-12-14 08:21:04,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-12-14 08:21:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:21:04,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:04,181 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 08:21:04,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:21:04,181 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:04,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:04,182 INFO L85 PathProgramCache]: Analyzing trace with hash 12149498, now seen corresponding path program 1 times [2022-12-14 08:21:04,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:04,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105069204] [2022-12-14 08:21:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:04,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105069204] [2022-12-14 08:21:04,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105069204] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:04,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023100140] [2022-12-14 08:21:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:04,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:04,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:04,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:04,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:21:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:04,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:21:04,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:04,479 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 08:21:04,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 08:21:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:04,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:04,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023100140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:21:04,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177300234] [2022-12-14 08:21:04,607 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 08:21:04,608 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:21:04,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:21:04,617 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:21:04,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:21:04,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-12-14 08:21:04,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 08:21:04,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:04,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:04,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:04,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:04,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2022-12-14 08:21:04,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:04,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:05,018 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:21:05,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 445 treesize of output 433 [2022-12-14 08:21:05,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:05,052 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 453 treesize of output 433 [2022-12-14 08:21:05,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:05,069 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 453 treesize of output 433 [2022-12-14 08:21:05,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:05,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:05,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:05,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:05,227 INFO L321 Elim1Store]: treesize reduction 103, result has 16.3 percent of original size [2022-12-14 08:21:05,228 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 6 case distinctions, treesize of input 467 treesize of output 428 [2022-12-14 08:21:05,245 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 432 treesize of output 431 [2022-12-14 08:21:05,259 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 432 treesize of output 431 [2022-12-14 08:21:05,345 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 23 treesize of output 1 [2022-12-14 08:21:05,358 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 15 treesize of output 11 [2022-12-14 08:21:05,367 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 23 treesize of output 1 [2022-12-14 08:21:05,391 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 08:21:05,398 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 08:21:05,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:05,428 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-12-14 08:21:05,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-12-14 08:21:05,467 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 15 treesize of output 11 [2022-12-14 08:21:05,481 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 23 treesize of output 1 [2022-12-14 08:21:05,488 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 23 treesize of output 1 [2022-12-14 08:21:05,499 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:21:05,902 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '633#(and (<= 0 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#cont~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.offset|) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (<= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (<= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#a~0#1.offset| 4 (* |ULTIMATE.start_main_~j~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)) (< |ULTIMATE.start_main_~j~0#1| 10) (= |#NULL.base| 0))' at error location [2022-12-14 08:21:05,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:21:05,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:21:05,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-12-14 08:21:05,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143769934] [2022-12-14 08:21:05,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:21:05,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:21:05,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:05,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:21:05,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:21:05,904 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:06,058 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-12-14 08:21:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:21:06,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:21:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:06,059 INFO L225 Difference]: With dead ends: 71 [2022-12-14 08:21:06,059 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 08:21:06,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-12-14 08:21:06,061 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:06,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 116 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 08:21:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-12-14 08:21:06,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:06,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2022-12-14 08:21:06,065 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 6 [2022-12-14 08:21:06,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:06,065 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2022-12-14 08:21:06,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:06,066 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2022-12-14 08:21:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:21:06,066 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:06,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2022-12-14 08:21:06,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:21:06,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:06,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:06,268 INFO L85 PathProgramCache]: Analyzing trace with hash 376637586, now seen corresponding path program 1 times [2022-12-14 08:21:06,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:06,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168483481] [2022-12-14 08:21:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:06,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:06,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:06,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168483481] [2022-12-14 08:21:06,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168483481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:06,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033350780] [2022-12-14 08:21:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:06,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:06,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:06,482 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:06,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:21:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:06,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:21:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:06,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,571 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 08:21:06,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 08:21:06,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 838 treesize of output 822 [2022-12-14 08:21:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:06,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:06,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033350780] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:21:06,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1045220425] [2022-12-14 08:21:06,716 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 08:21:06,717 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:21:06,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:21:06,717 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:21:06,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:21:06,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-12-14 08:21:06,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:06,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 08:21:06,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:06,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:21:06,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:21:06,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-12-14 08:21:06,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:06,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:07,020 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:21:07,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 415 [2022-12-14 08:21:07,060 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 08:21:07,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-12-14 08:21:07,092 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 08:21:07,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-12-14 08:21:07,316 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:21:07,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 797 treesize of output 798 [2022-12-14 08:21:07,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:07,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:07,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:07,376 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 08:21:07,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 824 treesize of output 774 [2022-12-14 08:21:07,416 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:21:07,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 789 treesize of output 790 [2022-12-14 08:21:07,753 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 15 treesize of output 11 [2022-12-14 08:21:07,760 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 23 treesize of output 1 [2022-12-14 08:21:07,765 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 23 treesize of output 1 [2022-12-14 08:21:07,775 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 08:21:07,781 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 08:21:07,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:07,798 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-12-14 08:21:07,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-12-14 08:21:07,813 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 23 treesize of output 1 [2022-12-14 08:21:07,819 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 15 treesize of output 11 [2022-12-14 08:21:07,824 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 23 treesize of output 1 [2022-12-14 08:21:07,829 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:21:08,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '826#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))))) (= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= (+ |ULTIMATE.start_main_~#a~0#1.offset| 4 (* |ULTIMATE.start_main_~j~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))) 2147483647) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (not (<= (+ 4 (* |ULTIMATE.start_main_~j~0#1| 4) |ULTIMATE.start_main_~#dummies~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dummies~0#1.base|))) (<= 0 (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~j~0#1| 10) (= |#NULL.base| 0))' at error location [2022-12-14 08:21:08,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:21:08,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:21:08,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-12-14 08:21:08,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094526907] [2022-12-14 08:21:08,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:21:08,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:21:08,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:08,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:21:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:21:08,026 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:08,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:08,123 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-12-14 08:21:08,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:21:08,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 08:21:08,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:08,124 INFO L225 Difference]: With dead ends: 71 [2022-12-14 08:21:08,124 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 08:21:08,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:21:08,125 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:08,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 100 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 08:21:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-12-14 08:21:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.85) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:08,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-12-14 08:21:08,129 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 7 [2022-12-14 08:21:08,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:08,130 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-12-14 08:21:08,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:08,130 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-12-14 08:21:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:21:08,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:08,130 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1] [2022-12-14 08:21:08,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:21:08,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 08:21:08,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:08,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:08,334 INFO L85 PathProgramCache]: Analyzing trace with hash -692034989, now seen corresponding path program 2 times [2022-12-14 08:21:08,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:08,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048985634] [2022-12-14 08:21:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:08,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:08,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048985634] [2022-12-14 08:21:08,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048985634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671071353] [2022-12-14 08:21:08,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:21:08,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:08,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:08,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:21:08,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 08:21:08,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:21:08,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:21:08,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:08,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:08,763 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 08:21:08,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 08:21:08,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 198 [2022-12-14 08:21:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:21:08,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:21:09,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671071353] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:21:09,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094093245] [2022-12-14 08:21:09,057 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 08:21:09,057 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:21:09,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:21:09,057 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:21:09,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:21:09,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-12-14 08:21:09,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 08:21:09,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:09,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:09,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2022-12-14 08:21:09,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:09,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:09,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,333 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:21:09,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 445 treesize of output 433 [2022-12-14 08:21:09,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,353 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 453 treesize of output 433 [2022-12-14 08:21:09,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,368 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 453 treesize of output 433 [2022-12-14 08:21:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:09,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:09,496 INFO L321 Elim1Store]: treesize reduction 103, result has 16.3 percent of original size [2022-12-14 08:21:09,497 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 6 case distinctions, treesize of input 467 treesize of output 428 [2022-12-14 08:21:09,510 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 432 treesize of output 431 [2022-12-14 08:21:09,526 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 432 treesize of output 431 [2022-12-14 08:21:09,599 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 23 treesize of output 1 [2022-12-14 08:21:09,610 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 15 treesize of output 11 [2022-12-14 08:21:09,618 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 23 treesize of output 1 [2022-12-14 08:21:09,637 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 08:21:09,645 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 08:21:09,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:09,665 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-12-14 08:21:09,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-12-14 08:21:09,694 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 15 treesize of output 11 [2022-12-14 08:21:09,701 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 23 treesize of output 1 [2022-12-14 08:21:09,714 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 23 treesize of output 1 [2022-12-14 08:21:09,721 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:21:10,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1078#(and (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))))) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= (+ |ULTIMATE.start_main_~#a~0#1.offset| 4 (* |ULTIMATE.start_main_~j~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#cont~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.offset|) (<= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))) 2147483647) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (not (<= (+ 4 (* |ULTIMATE.start_main_~j~0#1| 4) |ULTIMATE.start_main_~#dummies~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dummies~0#1.base|))) (<= 0 (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4))) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1) (<= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~j~0#1| 10) (= |#NULL.base| 0))' at error location [2022-12-14 08:21:10,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:21:10,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:21:10,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2022-12-14 08:21:10,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073638469] [2022-12-14 08:21:10,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:21:10,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 08:21:10,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 08:21:10,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:21:10,092 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:10,357 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2022-12-14 08:21:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:21:10,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:21:10,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:10,358 INFO L225 Difference]: With dead ends: 75 [2022-12-14 08:21:10,358 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 08:21:10,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:21:10,359 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 119 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:10,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 116 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:21:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 08:21:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-12-14 08:21:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.75) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-12-14 08:21:10,361 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 16 [2022-12-14 08:21:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:10,361 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-12-14 08:21:10,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-12-14 08:21:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 08:21:10,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:10,362 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1] [2022-12-14 08:21:10,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:21:10,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:10,563 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash -779016281, now seen corresponding path program 1 times [2022-12-14 08:21:10,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:10,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897535686] [2022-12-14 08:21:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:10,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 08:21:10,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:10,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897535686] [2022-12-14 08:21:10,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897535686] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:10,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:10,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:21:10,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543794447] [2022-12-14 08:21:10,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:10,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:21:10,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:10,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:21:10,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:21:10,705 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:10,759 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2022-12-14 08:21:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:21:10,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 08:21:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:10,760 INFO L225 Difference]: With dead ends: 73 [2022-12-14 08:21:10,760 INFO L226 Difference]: Without dead ends: 73 [2022-12-14 08:21:10,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 08:21:10,761 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:10,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 35 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-14 08:21:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-12-14 08:21:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-12-14 08:21:10,765 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 22 [2022-12-14 08:21:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:10,765 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-12-14 08:21:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-12-14 08:21:10,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 08:21:10,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:10,766 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1] [2022-12-14 08:21:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 08:21:10,766 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:10,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:10,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1620377513, now seen corresponding path program 1 times [2022-12-14 08:21:10,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:10,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19298280] [2022-12-14 08:21:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:10,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:10,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:10,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19298280] [2022-12-14 08:21:10,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19298280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:10,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952365074] [2022-12-14 08:21:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:10,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:10,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:10,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:10,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:21:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:10,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:21:10,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:10,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:11,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952365074] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:21:11,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572496168] [2022-12-14 08:21:11,046 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 08:21:11,046 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:21:11,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:21:11,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:21:11,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:21:11,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-12-14 08:21:11,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:11,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 08:21:11,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:11,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:21:11,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:21:11,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-12-14 08:21:11,340 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 08:21:11,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 424 treesize of output 404 [2022-12-14 08:21:11,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:11,389 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:21:11,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 415 [2022-12-14 08:21:11,422 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 08:21:11,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-12-14 08:21:11,618 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:21:11,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 797 treesize of output 798 [2022-12-14 08:21:11,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:11,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:11,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:11,687 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 08:21:11,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 824 treesize of output 774 [2022-12-14 08:21:11,729 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:21:11,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 789 treesize of output 790 [2022-12-14 08:21:12,204 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 23 treesize of output 1 [2022-12-14 08:21:12,208 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 23 treesize of output 1 [2022-12-14 08:21:12,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:21:12,222 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 08:21:12,227 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 08:21:12,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:12,244 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-12-14 08:21:12,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-12-14 08:21:12,288 INFO L321 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2022-12-14 08:21:12,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 08:21:12,316 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 23 treesize of output 1 [2022-12-14 08:21:12,323 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 15 treesize of output 11 [2022-12-14 08:21:12,331 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 23 treesize of output 1 [2022-12-14 08:21:12,332 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:21:12,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1536#(and (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 0 (+ |ULTIMATE.start_main_~i~0#1| 2147483648)) (<= 10 |ULTIMATE.start_main_~j~0#1|) (or (not (< |ULTIMATE.start_main_~i~0#1| 9)) (not (< 0 |ULTIMATE.start_main_~i~0#1|))) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_21| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#a~0#1.base_21|) (= (select |#valid| |v_ULTIMATE.start_main_~#a~0#1.base_21|) 0))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:21:12,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:21:12,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:21:12,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-12-14 08:21:12,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973325559] [2022-12-14 08:21:12,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:21:12,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:21:12,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:21:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-12-14 08:21:12,619 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:12,659 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2022-12-14 08:21:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:21:12,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 08:21:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:12,661 INFO L225 Difference]: With dead ends: 84 [2022-12-14 08:21:12,661 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 08:21:12,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-12-14 08:21:12,662 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:12,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 153 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 08:21:12,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-14 08:21:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 83 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:12,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-12-14 08:21:12,666 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 23 [2022-12-14 08:21:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:12,666 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-12-14 08:21:12,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:12,666 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-12-14 08:21:12,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 08:21:12,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:12,667 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 08:21:12,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:21:12,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 08:21:12,869 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:12,870 INFO L85 PathProgramCache]: Analyzing trace with hash -415745943, now seen corresponding path program 2 times [2022-12-14 08:21:12,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:12,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716333231] [2022-12-14 08:21:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:12,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:13,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:13,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716333231] [2022-12-14 08:21:13,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716333231] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:13,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:13,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:21:13,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84353643] [2022-12-14 08:21:13,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:13,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:21:13,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:13,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:21:13,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:21:13,712 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:13,770 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-12-14 08:21:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:21:13,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 08:21:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:13,771 INFO L225 Difference]: With dead ends: 83 [2022-12-14 08:21:13,771 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 08:21:13,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:21:13,772 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:13,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 38 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 08:21:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-12-14 08:21:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-12-14 08:21:13,776 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 35 [2022-12-14 08:21:13,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:13,776 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-12-14 08:21:13,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:13,776 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-12-14 08:21:13,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 08:21:13,777 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:13,777 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 08:21:13,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:21:13,777 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:13,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash -415824423, now seen corresponding path program 1 times [2022-12-14 08:21:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:13,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516482811] [2022-12-14 08:21:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:13,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-12-14 08:21:14,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:14,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516482811] [2022-12-14 08:21:14,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516482811] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:14,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:14,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:21:14,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51753669] [2022-12-14 08:21:14,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:14,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:21:14,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:14,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:21:14,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:21:14,075 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:14,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:14,108 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-12-14 08:21:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:21:14,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 08:21:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:14,109 INFO L225 Difference]: With dead ends: 80 [2022-12-14 08:21:14,109 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 08:21:14,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:21:14,110 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:14,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 08:21:14,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-12-14 08:21:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.5) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-12-14 08:21:14,114 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 35 [2022-12-14 08:21:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:14,114 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-12-14 08:21:14,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-12-14 08:21:14,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 08:21:14,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:14,115 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1] [2022-12-14 08:21:14,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 08:21:14,115 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash -415824422, now seen corresponding path program 1 times [2022-12-14 08:21:14,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:14,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432342739] [2022-12-14 08:21:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:14,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:14,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:14,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432342739] [2022-12-14 08:21:14,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432342739] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:14,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:14,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:21:14,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506812177] [2022-12-14 08:21:14,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:14,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:21:14,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:14,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:21:14,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:21:14,396 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:14,435 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-12-14 08:21:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:21:14,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 08:21:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:14,436 INFO L225 Difference]: With dead ends: 79 [2022-12-14 08:21:14,436 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 08:21:14,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:21:14,437 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:14,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:14,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 08:21:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-12-14 08:21:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-12-14 08:21:14,440 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 35 [2022-12-14 08:21:14,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:14,440 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-12-14 08:21:14,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:14,440 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-12-14 08:21:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 08:21:14,440 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:14,440 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:14,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 08:21:14,441 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:14,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash -5655222, now seen corresponding path program 1 times [2022-12-14 08:21:14,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:14,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993778795] [2022-12-14 08:21:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:14,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:14,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993778795] [2022-12-14 08:21:14,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993778795] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:14,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443146369] [2022-12-14 08:21:14,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:14,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:14,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:14,709 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:14,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:21:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:14,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 08:21:14,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:15,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:15,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 08:21:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:15,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443146369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:21:15,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087142221] [2022-12-14 08:21:15,338 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:21:15,338 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:21:15,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:21:15,338 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:21:15,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:21:15,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-12-14 08:21:15,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:15,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:15,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 08:21:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2022-12-14 08:21:15,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:15,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:15,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,577 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:21:15,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 445 treesize of output 433 [2022-12-14 08:21:15,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,591 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 453 treesize of output 433 [2022-12-14 08:21:15,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,602 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 453 treesize of output 433 [2022-12-14 08:21:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,720 INFO L321 Elim1Store]: treesize reduction 103, result has 16.3 percent of original size [2022-12-14 08:21:15,720 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 6 case distinctions, treesize of input 467 treesize of output 428 [2022-12-14 08:21:15,735 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 432 treesize of output 431 [2022-12-14 08:21:15,748 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 432 treesize of output 431 [2022-12-14 08:21:15,827 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 23 treesize of output 1 [2022-12-14 08:21:15,831 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 23 treesize of output 1 [2022-12-14 08:21:15,839 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 15 treesize of output 11 [2022-12-14 08:21:15,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:15,864 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-12-14 08:21:15,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-12-14 08:21:15,872 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 08:21:15,877 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 08:21:15,895 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 15 treesize of output 11 [2022-12-14 08:21:15,898 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 23 treesize of output 1 [2022-12-14 08:21:15,904 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 23 treesize of output 1 [2022-12-14 08:21:15,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:15,915 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 27 treesize of output 15 [2022-12-14 08:21:15,922 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 11 treesize of output 7 [2022-12-14 08:21:15,926 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 13 [2022-12-14 08:21:15,948 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 23 treesize of output 1 [2022-12-14 08:21:15,953 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 23 treesize of output 1 [2022-12-14 08:21:15,957 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 15 treesize of output 11 [2022-12-14 08:21:15,959 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:21:16,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2453#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (< 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#dummy~0#1.base|) 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_~i~0#1|) (<= (+ 4 |ULTIMATE.start_main_~#dummy~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dummy~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 10 |ULTIMATE.start_main_~j~0#1|) (<= (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#a~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (not (<= (+ 8 (* |ULTIMATE.start_main_~i~0#1| 4) |ULTIMATE.start_main_~#dummies~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dummies~0#1.base|))) (= (+ 4 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#dummy~0#1.base|) |ULTIMATE.start_main_~#dummy~0#1.offset|)) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| 9) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#a~0#1.base|) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#dummy~0#1.base|) |ULTIMATE.start_main_~#dummy~0#1.offset|) |ULTIMATE.start_main_~#a~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:21:16,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:21:16,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:21:16,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2022-12-14 08:21:16,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478122189] [2022-12-14 08:21:16,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:21:16,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 08:21:16,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:16,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 08:21:16,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 08:21:16,561 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:16,800 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-12-14 08:21:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 08:21:16,800 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-14 08:21:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:16,800 INFO L225 Difference]: With dead ends: 77 [2022-12-14 08:21:16,800 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 08:21:16,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=880, Invalid=2312, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 08:21:16,802 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 341 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:16,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 25 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 08:21:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-12-14 08:21:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-12-14 08:21:16,803 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 36 [2022-12-14 08:21:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:16,804 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-12-14 08:21:16,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 37 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-12-14 08:21:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 08:21:16,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:16,805 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:16,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 08:21:17,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 08:21:17,006 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash -175311908, now seen corresponding path program 1 times [2022-12-14 08:21:17,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:17,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547672134] [2022-12-14 08:21:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:17,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-12-14 08:21:17,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:17,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547672134] [2022-12-14 08:21:17,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547672134] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:17,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:17,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:21:17,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237669440] [2022-12-14 08:21:17,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:17,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:21:17,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:17,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:21:17,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:21:17,304 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:17,338 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2022-12-14 08:21:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:21:17,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-14 08:21:17,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:17,339 INFO L225 Difference]: With dead ends: 75 [2022-12-14 08:21:17,339 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 08:21:17,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:21:17,339 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:17,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 16 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 08:21:17,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-14 08:21:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-12-14 08:21:17,341 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 37 [2022-12-14 08:21:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:17,341 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-12-14 08:21:17,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-12-14 08:21:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 08:21:17,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:17,342 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:17,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 08:21:17,342 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:17,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:17,343 INFO L85 PathProgramCache]: Analyzing trace with hash -175311907, now seen corresponding path program 1 times [2022-12-14 08:21:17,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:17,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422772065] [2022-12-14 08:21:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:17,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:17,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:17,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422772065] [2022-12-14 08:21:17,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422772065] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:17,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:17,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:21:17,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414897119] [2022-12-14 08:21:17,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:17,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:21:17,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:21:17,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:21:17,746 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:17,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:17,777 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-12-14 08:21:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:21:17,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-14 08:21:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:17,778 INFO L225 Difference]: With dead ends: 73 [2022-12-14 08:21:17,778 INFO L226 Difference]: Without dead ends: 73 [2022-12-14 08:21:17,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:21:17,778 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:17,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 16 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:17,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-14 08:21:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-12-14 08:21:17,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-12-14 08:21:17,780 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 37 [2022-12-14 08:21:17,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:17,780 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-12-14 08:21:17,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-12-14 08:21:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 08:21:17,781 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:17,781 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:17,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 08:21:17,781 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:17,782 INFO L85 PathProgramCache]: Analyzing trace with hash -971018785, now seen corresponding path program 1 times [2022-12-14 08:21:17,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:17,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119292155] [2022-12-14 08:21:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:17,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-12-14 08:21:17,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:17,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119292155] [2022-12-14 08:21:17,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119292155] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:17,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:17,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:21:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346949419] [2022-12-14 08:21:17,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:17,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:21:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:17,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:21:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:21:17,916 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:17,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:17,970 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-12-14 08:21:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:21:17,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-14 08:21:17,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:17,971 INFO L225 Difference]: With dead ends: 72 [2022-12-14 08:21:17,971 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 08:21:17,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:21:17,971 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:17,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 31 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 08:21:17,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-12-14 08:21:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-12-14 08:21:17,973 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 39 [2022-12-14 08:21:17,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:17,973 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-12-14 08:21:17,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-12-14 08:21:17,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 08:21:17,974 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:17,974 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:17,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 08:21:17,974 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:17,974 INFO L85 PathProgramCache]: Analyzing trace with hash -971018784, now seen corresponding path program 1 times [2022-12-14 08:21:17,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:17,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537806126] [2022-12-14 08:21:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:17,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 108 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:18,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:18,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537806126] [2022-12-14 08:21:18,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537806126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572226755] [2022-12-14 08:21:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:18,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:18,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:18,397 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:18,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:21:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:18,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 08:21:18,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:18,800 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 13 treesize of output 9 [2022-12-14 08:21:18,804 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 11 treesize of output 7 [2022-12-14 08:21:18,835 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 23 treesize of output 15 [2022-12-14 08:21:18,837 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 26 treesize of output 14 [2022-12-14 08:21:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:18,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:21:18,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 08:21:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 135 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:19,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572226755] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:21:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [47043161] [2022-12-14 08:21:19,175 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 08:21:19,175 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:21:19,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:21:19,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:21:19,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:21:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-12-14 08:21:19,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:19,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:21:19,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 08:21:19,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:19,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:19,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2022-12-14 08:21:19,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,386 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:21:19,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 445 treesize of output 433 [2022-12-14 08:21:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,401 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 453 treesize of output 433 [2022-12-14 08:21:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,412 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 453 treesize of output 433 [2022-12-14 08:21:19,493 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 432 treesize of output 431 [2022-12-14 08:21:19,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:19,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,542 INFO L321 Elim1Store]: treesize reduction 103, result has 16.3 percent of original size [2022-12-14 08:21:19,542 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 6 case distinctions, treesize of input 467 treesize of output 428 [2022-12-14 08:21:19,556 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 432 treesize of output 431 [2022-12-14 08:21:19,613 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 23 treesize of output 1 [2022-12-14 08:21:19,621 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 23 treesize of output 1 [2022-12-14 08:21:19,626 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 15 treesize of output 11 [2022-12-14 08:21:19,640 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 08:21:19,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:21:19,656 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-12-14 08:21:19,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-12-14 08:21:19,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:19,682 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 23 treesize of output 1 [2022-12-14 08:21:19,686 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 15 treesize of output 11 [2022-12-14 08:21:19,690 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 23 treesize of output 1 [2022-12-14 08:21:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,700 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 27 treesize of output 15 [2022-12-14 08:21:19,705 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 11 treesize of output 7 [2022-12-14 08:21:19,710 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 13 [2022-12-14 08:21:19,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,721 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 23 [2022-12-14 08:21:19,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,730 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 37 treesize of output 15 [2022-12-14 08:21:19,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,737 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 30 treesize of output 29 [2022-12-14 08:21:19,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,751 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 27 treesize of output 15 [2022-12-14 08:21:19,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,768 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 08:21:19,768 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 2 case distinctions, treesize of input 39 treesize of output 45 [2022-12-14 08:21:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:21:19,793 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:21:19,793 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 2 case distinctions, treesize of input 31 treesize of output 37 [2022-12-14 08:21:19,830 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 23 treesize of output 1 [2022-12-14 08:21:19,838 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 15 treesize of output 11 [2022-12-14 08:21:19,846 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 23 treesize of output 1 [2022-12-14 08:21:19,847 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:21:21,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [47043161] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:21,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:21:21,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14, 14, 14] total 52 [2022-12-14 08:21:21,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318826069] [2022-12-14 08:21:21,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:21,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:21:21,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:21,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:21:21,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=2206, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 08:21:21,078 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:21,266 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2022-12-14 08:21:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:21:21,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-14 08:21:21,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:21,267 INFO L225 Difference]: With dead ends: 71 [2022-12-14 08:21:21,267 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 08:21:21,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=656, Invalid=2206, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 08:21:21,268 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:21,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 59 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:21:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 08:21:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-12-14 08:21:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2022-12-14 08:21:21,269 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 39 [2022-12-14 08:21:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:21,269 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2022-12-14 08:21:21,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2022-12-14 08:21:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 08:21:21,270 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:21,270 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:21,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:21:21,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 08:21:21,472 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:21,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:21,473 INFO L85 PathProgramCache]: Analyzing trace with hash -36811249, now seen corresponding path program 1 times [2022-12-14 08:21:21,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:21,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614424655] [2022-12-14 08:21:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:21,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 08:21:24,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:24,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614424655] [2022-12-14 08:21:24,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614424655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:24,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33679014] [2022-12-14 08:21:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:24,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:24,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:24,012 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:24,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:21:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:24,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 08:21:24,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:24,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:21:24,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 110 [2022-12-14 08:21:24,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:24,331 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 39 treesize of output 29 [2022-12-14 08:21:24,334 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 13 treesize of output 9 [2022-12-14 08:21:24,373 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 49 treesize of output 37 [2022-12-14 08:21:24,420 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-12-14 08:21:24,421 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 20 [2022-12-14 08:21:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:24,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:21:24,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33679014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:24,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:21:24,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 19 [2022-12-14 08:21:24,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355298243] [2022-12-14 08:21:24,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:24,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:21:24,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:21:24,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:21:24,425 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:24,669 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-12-14 08:21:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:21:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 08:21:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:24,670 INFO L225 Difference]: With dead ends: 70 [2022-12-14 08:21:24,670 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 08:21:24,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:21:24,671 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:24,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 55 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:24,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 08:21:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-12-14 08:21:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-12-14 08:21:24,672 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 40 [2022-12-14 08:21:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:24,673 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-12-14 08:21:24,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:24,673 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-12-14 08:21:24,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 08:21:24,673 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:24,673 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:24,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 08:21:24,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 08:21:24,875 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:24,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:24,876 INFO L85 PathProgramCache]: Analyzing trace with hash -36811248, now seen corresponding path program 1 times [2022-12-14 08:21:24,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:24,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110440827] [2022-12-14 08:21:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:24,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 3 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:28,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:28,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110440827] [2022-12-14 08:21:28,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110440827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:28,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581951823] [2022-12-14 08:21:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:28,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:28,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:28,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:28,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:21:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:28,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 08:21:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:28,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 08:21:28,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:28,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:28,718 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 50 treesize of output 40 [2022-12-14 08:21:28,721 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 63 treesize of output 49 [2022-12-14 08:21:28,829 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-12-14 08:21:28,830 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 64 [2022-12-14 08:21:28,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 21 [2022-12-14 08:21:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:28,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:21:28,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581951823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:28,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:21:28,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [17] total 23 [2022-12-14 08:21:28,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799163632] [2022-12-14 08:21:28,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:28,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:21:28,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:28,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:21:28,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:21:28,859 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:29,183 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2022-12-14 08:21:29,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:21:29,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 08:21:29,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:29,184 INFO L225 Difference]: With dead ends: 69 [2022-12-14 08:21:29,184 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 08:21:29,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-12-14 08:21:29,184 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:29,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 55 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:21:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 08:21:29,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-12-14 08:21:29,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-12-14 08:21:29,186 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 40 [2022-12-14 08:21:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:29,186 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-12-14 08:21:29,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-12-14 08:21:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 08:21:29,186 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:29,186 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:29,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 08:21:29,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:29,388 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:29,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1228287265, now seen corresponding path program 1 times [2022-12-14 08:21:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:29,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254724733] [2022-12-14 08:21:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:29,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:29,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254724733] [2022-12-14 08:21:29,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254724733] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:29,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:29,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 08:21:29,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714230181] [2022-12-14 08:21:29,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:29,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:21:29,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:29,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:21:29,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:21:29,822 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:29,929 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-12-14 08:21:29,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:21:29,930 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-14 08:21:29,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:29,930 INFO L225 Difference]: With dead ends: 68 [2022-12-14 08:21:29,930 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 08:21:29,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:21:29,931 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:29,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 51 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:29,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 08:21:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-12-14 08:21:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-12-14 08:21:29,933 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 44 [2022-12-14 08:21:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:29,933 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-12-14 08:21:29,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-12-14 08:21:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 08:21:29,934 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:29,934 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:29,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 08:21:29,934 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:29,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1228287264, now seen corresponding path program 1 times [2022-12-14 08:21:29,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:29,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705366056] [2022-12-14 08:21:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:29,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:30,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:30,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705366056] [2022-12-14 08:21:30,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705366056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:30,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:30,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 08:21:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588152596] [2022-12-14 08:21:30,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:30,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:21:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:21:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:21:30,477 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:30,653 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2022-12-14 08:21:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:21:30,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-14 08:21:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:30,654 INFO L225 Difference]: With dead ends: 67 [2022-12-14 08:21:30,654 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 08:21:30,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:21:30,655 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:30,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 58 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 08:21:30,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-12-14 08:21:30,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-12-14 08:21:30,656 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 44 [2022-12-14 08:21:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:30,656 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-12-14 08:21:30,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-12-14 08:21:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 08:21:30,657 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:30,657 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:30,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 08:21:30,657 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash 577800479, now seen corresponding path program 1 times [2022-12-14 08:21:30,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:30,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202335632] [2022-12-14 08:21:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:30,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-14 08:21:31,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:31,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202335632] [2022-12-14 08:21:31,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202335632] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:31,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:31,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 08:21:31,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618601883] [2022-12-14 08:21:31,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:31,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:21:31,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:31,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:21:31,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:21:31,245 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:31,358 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2022-12-14 08:21:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:21:31,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-14 08:21:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:31,358 INFO L225 Difference]: With dead ends: 66 [2022-12-14 08:21:31,358 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 08:21:31,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:21:31,359 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:31,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 47 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:31,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 08:21:31,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-12-14 08:21:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-12-14 08:21:31,360 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 45 [2022-12-14 08:21:31,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:31,360 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-12-14 08:21:31,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-12-14 08:21:31,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 08:21:31,361 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:31,361 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:31,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 08:21:31,361 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:31,361 INFO L85 PathProgramCache]: Analyzing trace with hash 577800480, now seen corresponding path program 1 times [2022-12-14 08:21:31,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:31,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337937758] [2022-12-14 08:21:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:31,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:32,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:32,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337937758] [2022-12-14 08:21:32,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337937758] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:32,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:32,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 08:21:32,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359941119] [2022-12-14 08:21:32,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:32,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:21:32,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:32,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:21:32,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:21:32,148 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:32,471 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2022-12-14 08:21:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:21:32,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-14 08:21:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:32,472 INFO L225 Difference]: With dead ends: 65 [2022-12-14 08:21:32,472 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 08:21:32,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:21:32,472 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:32,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 63 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 08:21:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-12-14 08:21:32,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-12-14 08:21:32,474 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 45 [2022-12-14 08:21:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:32,474 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-12-14 08:21:32,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-12-14 08:21:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 08:21:32,474 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:32,474 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:32,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 08:21:32,474 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:32,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:32,475 INFO L85 PathProgramCache]: Analyzing trace with hash 731947563, now seen corresponding path program 1 times [2022-12-14 08:21:32,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:32,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005809537] [2022-12-14 08:21:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:32,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:38,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:38,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005809537] [2022-12-14 08:21:38,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005809537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:38,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090752061] [2022-12-14 08:21:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:38,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:38,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:38,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:38,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 08:21:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:38,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 08:21:38,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:38,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 08:21:38,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:38,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:38,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:21:38,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:21:39,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 45 [2022-12-14 08:21:39,104 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-12-14 08:21:39,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2022-12-14 08:21:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:39,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:21:39,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090752061] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:39,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:21:39,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [21] total 28 [2022-12-14 08:21:39,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087396067] [2022-12-14 08:21:39,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:39,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 08:21:39,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:39,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 08:21:39,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-12-14 08:21:39,165 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:39,780 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-12-14 08:21:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:21:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 08:21:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:39,781 INFO L225 Difference]: With dead ends: 64 [2022-12-14 08:21:39,781 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 08:21:39,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 08:21:39,782 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:39,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 68 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:21:39,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 08:21:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-12-14 08:21:39,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-12-14 08:21:39,784 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 46 [2022-12-14 08:21:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:39,784 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-12-14 08:21:39,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-12-14 08:21:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 08:21:39,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:39,785 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:39,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 08:21:39,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:39,986 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:39,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:39,987 INFO L85 PathProgramCache]: Analyzing trace with hash 731947564, now seen corresponding path program 1 times [2022-12-14 08:21:39,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:39,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342840609] [2022-12-14 08:21:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:39,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:45,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:45,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342840609] [2022-12-14 08:21:45,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342840609] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:45,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938417789] [2022-12-14 08:21:45,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:45,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:45,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:45,381 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:45,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 08:21:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:45,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 08:21:45,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:45,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 08:21:45,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:45,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:21:45,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:21:45,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:21:45,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:21:45,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 100 [2022-12-14 08:21:45,954 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-12-14 08:21:45,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 73 [2022-12-14 08:21:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:46,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:21:46,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938417789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:46,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:21:46,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [21] total 28 [2022-12-14 08:21:46,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617654625] [2022-12-14 08:21:46,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:46,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 08:21:46,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:46,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 08:21:46,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-12-14 08:21:46,008 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:51,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:51,505 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2022-12-14 08:21:51,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:21:51,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 08:21:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:51,509 INFO L225 Difference]: With dead ends: 63 [2022-12-14 08:21:51,509 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 08:21:51,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 08:21:51,510 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:51,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 68 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 08:21:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 08:21:51,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-14 08:21:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 62 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-12-14 08:21:51,511 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 46 [2022-12-14 08:21:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:51,511 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-12-14 08:21:51,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-12-14 08:21:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 08:21:51,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:51,512 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:51,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 08:21:51,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 08:21:51,713 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:51,714 INFO L85 PathProgramCache]: Analyzing trace with hash -99069567, now seen corresponding path program 1 times [2022-12-14 08:21:51,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:51,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412351691] [2022-12-14 08:21:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:51,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:51,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:51,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412351691] [2022-12-14 08:21:51,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412351691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:51,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:51,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:21:51,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349106398] [2022-12-14 08:21:51,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:51,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:21:51,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:21:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:21:51,802 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:51,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:51,835 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2022-12-14 08:21:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:21:51,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 08:21:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:51,836 INFO L225 Difference]: With dead ends: 62 [2022-12-14 08:21:51,836 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 08:21:51,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:21:51,837 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:51,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 15 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 08:21:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-12-14 08:21:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:51,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-12-14 08:21:51,839 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 49 [2022-12-14 08:21:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:51,839 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-12-14 08:21:51,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-12-14 08:21:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 08:21:51,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:51,840 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:51,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 08:21:51,840 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash -99069566, now seen corresponding path program 1 times [2022-12-14 08:21:51,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:51,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354900159] [2022-12-14 08:21:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:51,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:51,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:51,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354900159] [2022-12-14 08:21:51,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354900159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:51,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:51,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:21:51,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772717413] [2022-12-14 08:21:51,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:51,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:21:51,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:51,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:21:51,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:21:51,971 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:52,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:52,006 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-12-14 08:21:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:21:52,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 08:21:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:52,007 INFO L225 Difference]: With dead ends: 61 [2022-12-14 08:21:52,007 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 08:21:52,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:21:52,008 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:52,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:21:52,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 08:21:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-12-14 08:21:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-12-14 08:21:52,009 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 49 [2022-12-14 08:21:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:52,010 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-12-14 08:21:52,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-12-14 08:21:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 08:21:52,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:52,010 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:52,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 08:21:52,010 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:52,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1223810772, now seen corresponding path program 1 times [2022-12-14 08:21:52,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:52,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645744115] [2022-12-14 08:21:52,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:52,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:21:52,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:52,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645744115] [2022-12-14 08:21:52,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645744115] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:21:52,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:21:52,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:21:52,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269343266] [2022-12-14 08:21:52,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:21:52,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:21:52,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:21:52,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:21:52,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:21:52,140 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:21:52,211 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-12-14 08:21:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:21:52,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 08:21:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:21:52,212 INFO L225 Difference]: With dead ends: 60 [2022-12-14 08:21:52,212 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 08:21:52,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:21:52,213 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:21:52,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 37 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:21:52,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 08:21:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-12-14 08:21:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-12-14 08:21:52,214 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 50 [2022-12-14 08:21:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:21:52,214 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-12-14 08:21:52,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:21:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-12-14 08:21:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 08:21:52,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:21:52,215 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:21:52,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 08:21:52,215 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:21:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:21:52,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1223810773, now seen corresponding path program 1 times [2022-12-14 08:21:52,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:21:52,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076923863] [2022-12-14 08:21:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:52,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:21:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:21:59,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:21:59,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076923863] [2022-12-14 08:21:59,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076923863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:21:59,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963400552] [2022-12-14 08:21:59,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:21:59,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:21:59,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:21:59,464 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:21:59,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 08:21:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:21:59,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 08:21:59,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:21:59,659 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 11 treesize of output 7 [2022-12-14 08:21:59,662 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 13 treesize of output 9 [2022-12-14 08:22:00,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:22:00,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 116 [2022-12-14 08:22:00,516 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:22:00,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 97 [2022-12-14 08:22:00,719 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 17 treesize of output 9 [2022-12-14 08:22:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:22:00,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:22:00,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963400552] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:22:00,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:22:00,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [27] total 37 [2022-12-14 08:22:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917400289] [2022-12-14 08:22:00,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:22:00,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 08:22:00,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:22:00,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 08:22:00,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 08:22:00,763 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:22:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:22:04,177 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2022-12-14 08:22:04,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:22:04,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 08:22:04,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:22:04,178 INFO L225 Difference]: With dead ends: 62 [2022-12-14 08:22:04,178 INFO L226 Difference]: Without dead ends: 62 [2022-12-14 08:22:04,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 08:22:04,179 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:22:04,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 90 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 08:22:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-14 08:22:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-12-14 08:22:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.125) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:22:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-12-14 08:22:04,180 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 50 [2022-12-14 08:22:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:22:04,180 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-12-14 08:22:04,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:22:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-12-14 08:22:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 08:22:04,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:22:04,181 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:22:04,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 08:22:04,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 08:22:04,382 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:22:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:22:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -691998418, now seen corresponding path program 1 times [2022-12-14 08:22:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:22:04,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968186750] [2022-12-14 08:22:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:22:04,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:22:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:22:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 08:22:07,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:22:07,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968186750] [2022-12-14 08:22:07,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968186750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:22:07,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635163633] [2022-12-14 08:22:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:22:07,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:22:07,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:22:07,078 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:22:07,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 08:22:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:22:07,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 08:22:07,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:22:07,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 08:22:07,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:22:07,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:22:07,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:22:07,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:22:07,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:22:07,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 159 treesize of output 100 [2022-12-14 08:22:07,681 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-12-14 08:22:07,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 69 [2022-12-14 08:22:07,754 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 17 treesize of output 9 [2022-12-14 08:22:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:22:07,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:22:07,850 INFO L321 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2022-12-14 08:22:07,851 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 15 treesize of output 15 [2022-12-14 08:22:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-14 08:22:09,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635163633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:22:09,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [920072767] [2022-12-14 08:22:09,343 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 08:22:09,343 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:22:09,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:22:09,343 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:22:09,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:22:09,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 26 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 45 [2022-12-14 08:22:09,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:22:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 08:22:09,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:22:09,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-12-14 08:22:09,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:22:09,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:22:09,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:22:09,590 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:22:09,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 415 [2022-12-14 08:22:09,626 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 08:22:09,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-12-14 08:22:09,658 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-12-14 08:22:09,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 416 treesize of output 396 [2022-12-14 08:22:09,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:09,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:22:09,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:22:09,889 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-12-14 08:22:09,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 832 treesize of output 782 [2022-12-14 08:22:09,926 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:22:09,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 797 treesize of output 798 [2022-12-14 08:22:09,955 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 08:22:09,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 789 treesize of output 790 [2022-12-14 08:22:10,282 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 23 treesize of output 1 [2022-12-14 08:22:10,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-12-14 08:22:10,292 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 15 treesize of output 11 [2022-12-14 08:22:10,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:22:10,316 INFO L321 Elim1Store]: treesize reduction 27, result has 37.2 percent of original size [2022-12-14 08:22:10,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 25 [2022-12-14 08:22:10,324 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 08:22:10,331 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 08:22:10,346 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 15 treesize of output 11 [2022-12-14 08:22:10,352 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 23 treesize of output 1 [2022-12-14 08:22:10,356 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 23 treesize of output 1 [2022-12-14 08:22:10,370 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 23 treesize of output 1 [2022-12-14 08:22:10,375 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 23 treesize of output 1 [2022-12-14 08:22:10,382 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 15 treesize of output 11 [2022-12-14 08:22:10,390 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 11 treesize of output 7 [2022-12-14 08:22:10,396 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 13 [2022-12-14 08:22:10,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:10,405 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 27 treesize of output 15 [2022-12-14 08:22:10,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:10,421 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 37 treesize of output 15 [2022-12-14 08:22:10,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:10,428 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 23 [2022-12-14 08:22:10,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:10,439 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 30 treesize of output 29 [2022-12-14 08:22:10,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:10,457 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 27 treesize of output 15 [2022-12-14 08:22:10,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:10,476 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:22:10,476 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 2 case distinctions, treesize of input 31 treesize of output 37 [2022-12-14 08:22:10,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:10,499 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 08:22:10,499 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 2 case distinctions, treesize of input 39 treesize of output 45 [2022-12-14 08:22:10,755 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:22:14,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6368#(and (= |ULTIMATE.start_main_~#cont~0#1.offset| 0) (= |ULTIMATE.start_check_~pc#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (<= (+ |ULTIMATE.start_check_~pc#1.offset| 4) (select |#length| |ULTIMATE.start_check_~pc#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~pa~0#1.base|) 1) (= |ULTIMATE.start_main_~#dummies~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dummies~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (not (< |ULTIMATE.start_main_~i~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|))) (= |ULTIMATE.start_check_#in~i#1| |ULTIMATE.start_check_~i#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|) |ULTIMATE.start_check_#t~mem4#1.base|) (or (not (<= (+ (* 4 |ULTIMATE.start_check_~i#1|) 4 |ULTIMATE.start_check_#t~mem4#1.offset|) (select |#length| |ULTIMATE.start_check_#t~mem4#1.base|))) (not (<= 0 (+ (* 4 |ULTIMATE.start_check_~i#1|) |ULTIMATE.start_check_#t~mem4#1.offset|)))) (<= 0 |ULTIMATE.start_main_~#dummy~0#1.base|) (<= 10 |ULTIMATE.start_main_~j~0#1|) (= |ULTIMATE.start_check_~pc#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (<= 0 |ULTIMATE.start_main_~#cont~0#1.base|) (= |ULTIMATE.start_main_~#cont~0#1.base| |ULTIMATE.start_check_#in~pc#1.base|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~i#1|) (= |ULTIMATE.start_main_~#cont~0#1.offset| |ULTIMATE.start_check_#in~pc#1.offset|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~#dummy~0#1.offset| 0) (<= (+ 4 |ULTIMATE.start_main_~pa~0#1.offset|) (select |#length| |ULTIMATE.start_main_~pa~0#1.base|)) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_check_~pc#1.base|) |ULTIMATE.start_check_~pc#1.offset|) |ULTIMATE.start_check_#t~mem4#1.offset|) (= (select |#valid| |ULTIMATE.start_check_~pc#1.base|) 1) (<= 0 |ULTIMATE.start_main_~pa~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:22:14,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:22:14,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:22:14,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 36 [2022-12-14 08:22:14,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796226667] [2022-12-14 08:22:14,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:22:14,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 08:22:14,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:22:14,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 08:22:15,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2933, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 08:22:15,000 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:22:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:22:17,473 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-12-14 08:22:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 08:22:17,473 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-12-14 08:22:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:22:17,473 INFO L225 Difference]: With dead ends: 68 [2022-12-14 08:22:17,473 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 08:22:17,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=481, Invalid=4775, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 08:22:17,475 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 144 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:22:17,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 187 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:22:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 08:22:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-12-14 08:22:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:22:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-12-14 08:22:17,477 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 52 [2022-12-14 08:22:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:22:17,477 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-12-14 08:22:17,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:22:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-12-14 08:22:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 08:22:17,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:22:17,478 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:22:17,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 08:22:17,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:22:17,678 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-12-14 08:22:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:22:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2001388871, now seen corresponding path program 2 times [2022-12-14 08:22:17,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:22:17,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560401664] [2022-12-14 08:22:17,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:22:17,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:22:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:22:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 3 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:22:26,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:22:26,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560401664] [2022-12-14 08:22:26,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560401664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:22:26,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541267049] [2022-12-14 08:22:26,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:22:26,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:22:26,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:22:26,624 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:22:26,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2928743f-c45b-465b-9d27-270ae15cd254/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 08:22:26,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:22:26,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:22:26,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 08:22:26,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:22:26,883 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 08:22:26,883 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 40 treesize of output 34 [2022-12-14 08:22:27,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:22:27,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-12-14 08:22:27,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 08:22:27,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:22:27,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 08:22:27,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2022-12-14 08:22:27,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 08:22:28,107 INFO L321 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2022-12-14 08:22:28,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 58 [2022-12-14 08:22:28,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 50 [2022-12-14 08:22:28,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 08:22:30,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:22:30,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:22:30,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 13 [2022-12-14 08:22:31,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:22:31,004 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 08:22:31,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 60 [2022-12-14 08:22:31,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2022-12-14 08:22:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-12-14 08:22:31,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:22:32,384 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse9 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#cont~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#cont~0#1.base|) |c_ULTIMATE.start_main_~#cont~0#1.offset| (+ |c_ULTIMATE.start_main_~#dummies~0#1.offset| 4)))) (.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#cont~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#cont~0#1.base|) |c_ULTIMATE.start_main_~#cont~0#1.offset| |c_ULTIMATE.start_main_~#dummies~0#1.base|))) (.cse10 (+ .cse9 |c_ULTIMATE.start_main_~#dummies~0#1.offset| 4))) (let ((.cse6 (select (select .cse8 |c_ULTIMATE.start_main_~#dummies~0#1.base|) .cse10)) (.cse7 (select (select .cse5 |c_ULTIMATE.start_main_~#dummies~0#1.base|) .cse10))) (let ((.cse1 (+ .cse9 |c_ULTIMATE.start_main_~#a~0#1.offset|)) (.cse2 (select (select .cse8 .cse6) .cse7)) (.cse3 (+ 4 (select (select .cse5 .cse6) .cse7)))) (and (forall ((v_ArrVal_5488 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#cont~0#1.base| v_ArrVal_5488))) (or (< (select (select .cse0 |c_ULTIMATE.start_main_~#a~0#1.base|) .cse1) 1) (< (+ (* (select (select .cse0 .cse2) .cse3) 4) 7 |c_ULTIMATE.start_main_~#dummies~0#1.offset|) (select |c_#length| |c_ULTIMATE.start_main_~#dummies~0#1.base|))))) (forall ((v_ArrVal_5488 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#cont~0#1.base| v_ArrVal_5488))) (or (< (select (select .cse4 |c_ULTIMATE.start_main_~#a~0#1.base|) .cse1) 1) (< 0 (+ (* (select (select .cse4 .cse2) .cse3) 4) 5 |c_ULTIMATE.start_main_~#dummies~0#1.offset|)))))))))) is different from false [2022-12-14 08:22:32,412 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse10 (+ .cse5 |c_ULTIMATE.start_main_~#dummies~0#1.offset| 4))) (let ((.cse6 (let ((.cse12 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#dummies~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#dummies~0#1.base|) .cse10 |c_ULTIMATE.start_main_~#dummy~0#1.offset|)))) (store .cse12 |c_ULTIMATE.start_main_~#cont~0#1.base| (store (select .cse12 |c_ULTIMATE.start_main_~#cont~0#1.base|) |c_ULTIMATE.start_main_~#cont~0#1.offset| (+ |c_ULTIMATE.start_main_~#dummies~0#1.offset| 4))))) (.cse9 (let ((.cse11 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#dummies~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#dummies~0#1.base|) .cse10 |c_ULTIMATE.start_main_~#dummy~0#1.base|)))) (store .cse11 |c_ULTIMATE.start_main_~#cont~0#1.base| (store (select .cse11 |c_ULTIMATE.start_main_~#cont~0#1.base|) |c_ULTIMATE.start_main_~#cont~0#1.offset| |c_ULTIMATE.start_main_~#dummies~0#1.base|))))) (let ((.cse7 (select (select .cse9 |c_ULTIMATE.start_main_~#dummies~0#1.base|) .cse10)) (.cse8 (select (select .cse6 |c_ULTIMATE.start_main_~#dummies~0#1.base|) .cse10))) (let ((.cse2 (select (select .cse9 .cse7) .cse8)) (.cse3 (+ (select (select .cse6 .cse7) .cse8) 4)) (.cse1 (+ .cse5 |c_ULTIMATE.start_main_~#a~0#1.offset|))) (and (forall ((v_ArrVal_5485 (Array Int Int)) (v_ArrVal_5488 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#dummies~0#1.base| v_ArrVal_5485) |c_ULTIMATE.start_main_~#cont~0#1.base| v_ArrVal_5488))) (or (< (select (select .cse0 |c_ULTIMATE.start_main_~#a~0#1.base|) .cse1) 1) (< (+ 7 |c_ULTIMATE.start_main_~#dummies~0#1.offset| (* (select (select .cse0 .cse2) .cse3) 4)) (select |c_#length| |c_ULTIMATE.start_main_~#dummies~0#1.base|))))) (forall ((v_ArrVal_5485 (Array Int Int)) (v_ArrVal_5488 (Array Int Int))) (let ((.cse4 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#dummies~0#1.base| v_ArrVal_5485) |c_ULTIMATE.start_main_~#cont~0#1.base| v_ArrVal_5488))) (or (< 0 (+ 5 |c_ULTIMATE.start_main_~#dummies~0#1.offset| (* (select (select .cse4 .cse2) .cse3) 4))) (< (select (select .cse4 |c_ULTIMATE.start_main_~#a~0#1.base|) .cse1) 1)))))))))) is different from false [2022-12-14 08:22:32,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:22:32,446 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 10149 treesize of output 9854 [2022-12-14 08:22:32,598 INFO L321 Elim1Store]: treesize reduction 26, result has 58.7 percent of original size [2022-12-14 08:22:32,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 167737 treesize of output 165789