./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0217.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0217.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur --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 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:44:15,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:44:15,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:44:15,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:44:15,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:44:15,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:44:15,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:44:15,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:44:15,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:44:15,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:44:15,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:44:15,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:44:15,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:44:15,970 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:44:15,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:44:15,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:44:15,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:44:15,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:44:15,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:44:15,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:44:15,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:44:16,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:44:16,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:44:16,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:44:16,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:44:16,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:44:16,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:44:16,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:44:16,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:44:16,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:44:16,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:44:16,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:44:16,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:44:16,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:44:16,021 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:44:16,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:44:16,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:44:16,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:44:16,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:44:16,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:44:16,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:44:16,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:44:16,077 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:44:16,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:44:16,077 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:44:16,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:44:16,083 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:44:16,083 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:44:16,083 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:44:16,083 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:44:16,084 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:44:16,084 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:44:16,085 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:44:16,085 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:44:16,085 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:44:16,086 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:44:16,086 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:44:16,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:44:16,086 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:44:16,086 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:44:16,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:44:16,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:44:16,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:44:16,088 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:44:16,088 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:44:16,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:44:16,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:44:16,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:44:16,089 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:44:16,090 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:44:16,090 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:44:16,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:44:16,090 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:44:16,091 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:44:16,091 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:44:16,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:44:16,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:44:16,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:44:16,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:44:16,092 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:44:16,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:44:16,092 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:44:16,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:44:16,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:44:16,093 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_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2022-11-26 00:44:16,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:44:16,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:44:16,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:44:16,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:44:16,384 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:44:16,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/memsafety/test-0217.i [2022-11-26 00:44:19,507 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:44:19,920 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:44:19,920 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/sv-benchmarks/c/memsafety/test-0217.i [2022-11-26 00:44:19,941 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/data/f71bfdda3/bf588fd4831d4c30aaddd4fa812a222c/FLAGff7af50c3 [2022-11-26 00:44:19,958 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/data/f71bfdda3/bf588fd4831d4c30aaddd4fa812a222c [2022-11-26 00:44:19,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:44:19,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:44:19,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:44:19,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:44:19,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:44:19,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@659bebc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:19, skipping insertion in model container [2022-11-26 00:44:19,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:44:19" (1/1) ... [2022-11-26 00:44:19,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:44:20,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:44:20,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:44:20,481 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:44:20,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:44:20,602 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:44:20,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20 WrapperNode [2022-11-26 00:44:20,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:44:20,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:44:20,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:44:20,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:44:20,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,690 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 210 [2022-11-26 00:44:20,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:44:20,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:44:20,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:44:20,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:44:20,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,738 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:44:20,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:44:20,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:44:20,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:44:20,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (1/1) ... [2022-11-26 00:44:20,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:44:20,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:20,779 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:44:20,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:44:20,858 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-26 00:44:20,860 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-26 00:44:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:44:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:44:20,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:44:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:44:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:44:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:44:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:44:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:44:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:44:20,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:44:21,099 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:44:21,106 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:44:21,760 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:44:21,872 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:44:21,873 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-26 00:44:21,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:44:21 BoogieIcfgContainer [2022-11-26 00:44:21,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:44:21,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:44:21,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:44:21,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:44:21,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:44:19" (1/3) ... [2022-11-26 00:44:21,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6456abc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:44:21, skipping insertion in model container [2022-11-26 00:44:21,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:44:20" (2/3) ... [2022-11-26 00:44:21,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6456abc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:44:21, skipping insertion in model container [2022-11-26 00:44:21,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:44:21" (3/3) ... [2022-11-26 00:44:21,887 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217.i [2022-11-26 00:44:21,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:44:21,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2022-11-26 00:44:21,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:44:21,949 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;@2a689003, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:44:21,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-11-26 00:44:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:44:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:44:21,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:21,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:44:21,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:21,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:21,965 INFO L85 PathProgramCache]: Analyzing trace with hash 10235659, now seen corresponding path program 1 times [2022-11-26 00:44:21,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:21,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955157144] [2022-11-26 00:44:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:21,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:22,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:22,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955157144] [2022-11-26 00:44:22,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955157144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:22,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:22,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:44:22,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572141089] [2022-11-26 00:44:22,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:22,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:44:22,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:22,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:44:22,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:44:22,197 INFO L87 Difference]: Start difference. First operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-11-26 00:44:22,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:22,319 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-11-26 00:44:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:44:22,322 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2022-11-26 00:44:22,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:22,330 INFO L225 Difference]: With dead ends: 138 [2022-11-26 00:44:22,330 INFO L226 Difference]: Without dead ends: 137 [2022-11-26 00:44:22,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:44:22,335 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:22,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:22,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-26 00:44:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-26 00:44:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 133 states have internal predecessors, (147), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:44:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-11-26 00:44:22,397 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 4 [2022-11-26 00:44:22,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:22,398 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-11-26 00:44:22,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2022-11-26 00:44:22,398 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-11-26 00:44:22,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:44:22,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:22,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:44:22,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:44:22,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash 309792813, now seen corresponding path program 1 times [2022-11-26 00:44:22,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:22,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70376212] [2022-11-26 00:44:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:22,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:22,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:22,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70376212] [2022-11-26 00:44:22,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70376212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:22,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:22,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:44:22,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153062643] [2022-11-26 00:44:22,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:22,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:44:22,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:22,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:44:22,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:44:22,538 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:22,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:22,903 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2022-11-26 00:44:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:44:22,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-26 00:44:22,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:22,906 INFO L225 Difference]: With dead ends: 267 [2022-11-26 00:44:22,906 INFO L226 Difference]: Without dead ends: 267 [2022-11-26 00:44:22,906 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 [2022-11-26 00:44:22,908 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 135 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:22,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 160 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-26 00:44:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2022-11-26 00:44:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 107 states have (on average 2.177570093457944) internal successors, (233), 173 states have internal predecessors, (233), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:44:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 241 transitions. [2022-11-26 00:44:22,943 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 241 transitions. Word has length 5 [2022-11-26 00:44:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:22,944 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 241 transitions. [2022-11-26 00:44:22,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 241 transitions. [2022-11-26 00:44:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:44:22,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:22,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:44:22,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:44:22,946 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash 309792814, now seen corresponding path program 1 times [2022-11-26 00:44:22,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:22,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913776320] [2022-11-26 00:44:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:22,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:23,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:23,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913776320] [2022-11-26 00:44:23,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913776320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:23,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:23,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:44:23,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62258532] [2022-11-26 00:44:23,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:23,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:23,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:44:23,188 INFO L87 Difference]: Start difference. First operand 180 states and 241 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:23,454 INFO L93 Difference]: Finished difference Result 282 states and 361 transitions. [2022-11-26 00:44:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:44:23,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-11-26 00:44:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:23,457 INFO L225 Difference]: With dead ends: 282 [2022-11-26 00:44:23,457 INFO L226 Difference]: Without dead ends: 282 [2022-11-26 00:44:23,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:23,459 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 101 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:23,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 283 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-26 00:44:23,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 238. [2022-11-26 00:44:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 159 states have (on average 2.0817610062893084) internal successors, (331), 227 states have internal predecessors, (331), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:44:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 347 transitions. [2022-11-26 00:44:23,473 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 347 transitions. Word has length 5 [2022-11-26 00:44:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:23,474 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 347 transitions. [2022-11-26 00:44:23,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 347 transitions. [2022-11-26 00:44:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:44:23,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:23,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:23,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:44:23,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:23,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:23,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1358194260, now seen corresponding path program 1 times [2022-11-26 00:44:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:23,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216344323] [2022-11-26 00:44:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:23,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:23,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:23,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216344323] [2022-11-26 00:44:23,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216344323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:23,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:23,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:23,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622750377] [2022-11-26 00:44:23,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:23,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:23,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:23,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:23,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:23,932 INFO L87 Difference]: Start difference. First operand 238 states and 347 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2022-11-26 00:44:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:24,217 INFO L93 Difference]: Finished difference Result 306 states and 422 transitions. [2022-11-26 00:44:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:24,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 7 [2022-11-26 00:44:24,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:24,221 INFO L225 Difference]: With dead ends: 306 [2022-11-26 00:44:24,221 INFO L226 Difference]: Without dead ends: 306 [2022-11-26 00:44:24,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:24,223 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 134 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:24,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 300 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-26 00:44:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 271. [2022-11-26 00:44:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 189 states have (on average 2.0476190476190474) internal successors, (387), 258 states have internal predecessors, (387), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 407 transitions. [2022-11-26 00:44:24,238 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 407 transitions. Word has length 7 [2022-11-26 00:44:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:24,239 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 407 transitions. [2022-11-26 00:44:24,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2022-11-26 00:44:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 407 transitions. [2022-11-26 00:44:24,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:44:24,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:24,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:24,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:44:24,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:24,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1358195917, now seen corresponding path program 1 times [2022-11-26 00:44:24,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:24,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157717631] [2022-11-26 00:44:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:24,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:24,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:24,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157717631] [2022-11-26 00:44:24,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157717631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:24,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:24,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:44:24,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930059182] [2022-11-26 00:44:24,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:24,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:44:24,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:44:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:44:24,269 INFO L87 Difference]: Start difference. First operand 271 states and 407 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-26 00:44:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:24,421 INFO L93 Difference]: Finished difference Result 318 states and 450 transitions. [2022-11-26 00:44:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:44:24,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 7 [2022-11-26 00:44:24,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:24,424 INFO L225 Difference]: With dead ends: 318 [2022-11-26 00:44:24,424 INFO L226 Difference]: Without dead ends: 314 [2022-11-26 00:44:24,425 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 [2022-11-26 00:44:24,426 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 58 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:24,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 188 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-26 00:44:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 269. [2022-11-26 00:44:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 187 states have (on average 2.053475935828877) internal successors, (384), 256 states have internal predecessors, (384), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 404 transitions. [2022-11-26 00:44:24,438 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 404 transitions. Word has length 7 [2022-11-26 00:44:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:24,439 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 404 transitions. [2022-11-26 00:44:24,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-26 00:44:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 404 transitions. [2022-11-26 00:44:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:44:24,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:24,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:24,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:44:24,441 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:24,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2101991332, now seen corresponding path program 1 times [2022-11-26 00:44:24,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:24,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138225356] [2022-11-26 00:44:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:24,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:24,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:24,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138225356] [2022-11-26 00:44:24,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138225356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:24,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:24,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:44:24,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207864958] [2022-11-26 00:44:24,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:24,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:24,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:24,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:24,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:44:24,635 INFO L87 Difference]: Start difference. First operand 269 states and 404 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:25,016 INFO L93 Difference]: Finished difference Result 471 states and 577 transitions. [2022-11-26 00:44:25,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:25,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-26 00:44:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:25,019 INFO L225 Difference]: With dead ends: 471 [2022-11-26 00:44:25,019 INFO L226 Difference]: Without dead ends: 471 [2022-11-26 00:44:25,019 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 [2022-11-26 00:44:25,020 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 385 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:25,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 282 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:25,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-26 00:44:25,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 266. [2022-11-26 00:44:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 188 states have (on average 2.0106382978723403) internal successors, (378), 253 states have internal predecessors, (378), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 398 transitions. [2022-11-26 00:44:25,032 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 398 transitions. Word has length 10 [2022-11-26 00:44:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:25,032 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 398 transitions. [2022-11-26 00:44:25,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:25,033 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 398 transitions. [2022-11-26 00:44:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:44:25,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:25,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:25,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:44:25,034 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:25,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:25,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2101991331, now seen corresponding path program 1 times [2022-11-26 00:44:25,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:25,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380343038] [2022-11-26 00:44:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:25,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:25,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:25,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380343038] [2022-11-26 00:44:25,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380343038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:25,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:25,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:44:25,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169553435] [2022-11-26 00:44:25,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:25,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:25,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:25,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:25,296 INFO L87 Difference]: Start difference. First operand 266 states and 398 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:26,121 INFO L93 Difference]: Finished difference Result 564 states and 712 transitions. [2022-11-26 00:44:26,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:44:26,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-26 00:44:26,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:26,125 INFO L225 Difference]: With dead ends: 564 [2022-11-26 00:44:26,125 INFO L226 Difference]: Without dead ends: 564 [2022-11-26 00:44:26,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:44:26,126 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 505 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:26,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 378 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:44:26,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-26 00:44:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 281. [2022-11-26 00:44:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 203 states have (on average 2.0098522167487687) internal successors, (408), 268 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:26,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 428 transitions. [2022-11-26 00:44:26,138 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 428 transitions. Word has length 10 [2022-11-26 00:44:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:26,138 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 428 transitions. [2022-11-26 00:44:26,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 428 transitions. [2022-11-26 00:44:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:44:26,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:26,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:26,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:44:26,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:26,140 INFO L85 PathProgramCache]: Analyzing trace with hash 507782900, now seen corresponding path program 1 times [2022-11-26 00:44:26,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:26,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110270723] [2022-11-26 00:44:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:26,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:26,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:26,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110270723] [2022-11-26 00:44:26,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110270723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:26,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:26,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:44:26,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978942282] [2022-11-26 00:44:26,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:26,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:26,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:26,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:26,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:44:26,191 INFO L87 Difference]: Start difference. First operand 281 states and 428 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:26,514 INFO L93 Difference]: Finished difference Result 477 states and 646 transitions. [2022-11-26 00:44:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:44:26,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-26 00:44:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:26,518 INFO L225 Difference]: With dead ends: 477 [2022-11-26 00:44:26,518 INFO L226 Difference]: Without dead ends: 477 [2022-11-26 00:44:26,518 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 [2022-11-26 00:44:26,519 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 250 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:26,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 275 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-11-26 00:44:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 287. [2022-11-26 00:44:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 209 states have (on average 1.9808612440191387) internal successors, (414), 274 states have internal predecessors, (414), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 434 transitions. [2022-11-26 00:44:26,534 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 434 transitions. Word has length 12 [2022-11-26 00:44:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:26,534 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 434 transitions. [2022-11-26 00:44:26,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 434 transitions. [2022-11-26 00:44:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:44:26,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:26,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:26,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:44:26,536 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:26,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:26,538 INFO L85 PathProgramCache]: Analyzing trace with hash 507782901, now seen corresponding path program 1 times [2022-11-26 00:44:26,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:26,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548082497] [2022-11-26 00:44:26,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:26,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:26,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548082497] [2022-11-26 00:44:26,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548082497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:26,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:26,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:44:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004748295] [2022-11-26 00:44:26,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:26,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:26,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:26,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:26,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:44:26,666 INFO L87 Difference]: Start difference. First operand 287 states and 434 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:26,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:26,917 INFO L93 Difference]: Finished difference Result 338 states and 453 transitions. [2022-11-26 00:44:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:44:26,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-26 00:44:26,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:26,919 INFO L225 Difference]: With dead ends: 338 [2022-11-26 00:44:26,919 INFO L226 Difference]: Without dead ends: 338 [2022-11-26 00:44:26,920 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 [2022-11-26 00:44:26,920 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 160 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:26,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 281 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:26,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-26 00:44:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 287. [2022-11-26 00:44:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 209 states have (on average 1.937799043062201) internal successors, (405), 274 states have internal predecessors, (405), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 425 transitions. [2022-11-26 00:44:26,930 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 425 transitions. Word has length 12 [2022-11-26 00:44:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:26,930 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 425 transitions. [2022-11-26 00:44:26,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 425 transitions. [2022-11-26 00:44:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:44:26,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:26,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:26,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:44:26,932 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:26,932 INFO L85 PathProgramCache]: Analyzing trace with hash 207060389, now seen corresponding path program 1 times [2022-11-26 00:44:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:26,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076277687] [2022-11-26 00:44:26,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:26,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:27,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:27,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076277687] [2022-11-26 00:44:27,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076277687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:27,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:27,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:44:27,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94993879] [2022-11-26 00:44:27,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:27,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:44:27,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:27,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:44:27,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:27,422 INFO L87 Difference]: Start difference. First operand 287 states and 425 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:28,061 INFO L93 Difference]: Finished difference Result 376 states and 519 transitions. [2022-11-26 00:44:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:44:28,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-26 00:44:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:28,064 INFO L225 Difference]: With dead ends: 376 [2022-11-26 00:44:28,064 INFO L226 Difference]: Without dead ends: 376 [2022-11-26 00:44:28,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:44:28,065 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 141 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:28,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 649 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:44:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-26 00:44:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 293. [2022-11-26 00:44:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 215 states have (on average 1.9209302325581394) internal successors, (413), 278 states have internal predecessors, (413), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 433 transitions. [2022-11-26 00:44:28,076 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 433 transitions. Word has length 13 [2022-11-26 00:44:28,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:28,076 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 433 transitions. [2022-11-26 00:44:28,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 433 transitions. [2022-11-26 00:44:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:44:28,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:28,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:28,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:44:28,078 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:28,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:28,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1432560070, now seen corresponding path program 1 times [2022-11-26 00:44:28,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:28,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656522588] [2022-11-26 00:44:28,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:28,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:28,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:28,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656522588] [2022-11-26 00:44:28,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656522588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:28,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:28,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:44:28,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501942477] [2022-11-26 00:44:28,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:28,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:44:28,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:28,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:44:28,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:28,443 INFO L87 Difference]: Start difference. First operand 293 states and 433 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:28,856 INFO L93 Difference]: Finished difference Result 334 states and 443 transitions. [2022-11-26 00:44:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:44:28,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-26 00:44:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:28,858 INFO L225 Difference]: With dead ends: 334 [2022-11-26 00:44:28,858 INFO L226 Difference]: Without dead ends: 334 [2022-11-26 00:44:28,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:44:28,859 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 478 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:28,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 443 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-26 00:44:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2022-11-26 00:44:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 215 states have (on average 1.8930232558139535) internal successors, (407), 276 states have internal predecessors, (407), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:28,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 427 transitions. [2022-11-26 00:44:28,867 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 427 transitions. Word has length 15 [2022-11-26 00:44:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:28,867 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 427 transitions. [2022-11-26 00:44:28,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 427 transitions. [2022-11-26 00:44:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:44:28,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:28,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:28,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:44:28,869 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1432560069, now seen corresponding path program 1 times [2022-11-26 00:44:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:28,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835110732] [2022-11-26 00:44:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:28,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835110732] [2022-11-26 00:44:28,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835110732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:28,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:28,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:44:28,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639295983] [2022-11-26 00:44:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:28,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:44:28,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:44:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:44:28,911 INFO L87 Difference]: Start difference. First operand 291 states and 427 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:29,065 INFO L93 Difference]: Finished difference Result 364 states and 502 transitions. [2022-11-26 00:44:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:44:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-26 00:44:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:29,068 INFO L225 Difference]: With dead ends: 364 [2022-11-26 00:44:29,068 INFO L226 Difference]: Without dead ends: 364 [2022-11-26 00:44:29,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:44:29,069 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 120 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:29,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 189 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-26 00:44:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 288. [2022-11-26 00:44:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 215 states have (on average 1.8511627906976744) internal successors, (398), 273 states have internal predecessors, (398), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 418 transitions. [2022-11-26 00:44:29,078 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 418 transitions. Word has length 15 [2022-11-26 00:44:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:29,078 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 418 transitions. [2022-11-26 00:44:29,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 418 transitions. [2022-11-26 00:44:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:44:29,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:29,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:29,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:44:29,080 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1432561889, now seen corresponding path program 1 times [2022-11-26 00:44:29,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:29,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975018891] [2022-11-26 00:44:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:29,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:29,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:29,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975018891] [2022-11-26 00:44:29,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975018891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:29,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:29,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:29,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595070917] [2022-11-26 00:44:29,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:29,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:29,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:29,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:29,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:44:29,160 INFO L87 Difference]: Start difference. First operand 288 states and 418 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:29,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:29,226 INFO L93 Difference]: Finished difference Result 294 states and 424 transitions. [2022-11-26 00:44:29,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:44:29,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-26 00:44:29,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:29,229 INFO L225 Difference]: With dead ends: 294 [2022-11-26 00:44:29,229 INFO L226 Difference]: Without dead ends: 294 [2022-11-26 00:44:29,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:29,230 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:29,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 353 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-26 00:44:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-11-26 00:44:29,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 221 states have (on average 1.8280542986425339) internal successors, (404), 279 states have internal predecessors, (404), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:29,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 424 transitions. [2022-11-26 00:44:29,251 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 424 transitions. Word has length 15 [2022-11-26 00:44:29,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:29,251 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 424 transitions. [2022-11-26 00:44:29,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 424 transitions. [2022-11-26 00:44:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:44:29,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:29,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:29,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:44:29,256 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1993620963, now seen corresponding path program 1 times [2022-11-26 00:44:29,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:29,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754698058] [2022-11-26 00:44:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:29,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:29,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:29,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754698058] [2022-11-26 00:44:29,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754698058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:29,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:29,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:44:29,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108935367] [2022-11-26 00:44:29,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:29,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:44:29,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:29,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:44:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:29,625 INFO L87 Difference]: Start difference. First operand 294 states and 424 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:30,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:30,166 INFO L93 Difference]: Finished difference Result 491 states and 665 transitions. [2022-11-26 00:44:30,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:44:30,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-26 00:44:30,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:30,169 INFO L225 Difference]: With dead ends: 491 [2022-11-26 00:44:30,169 INFO L226 Difference]: Without dead ends: 489 [2022-11-26 00:44:30,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:44:30,170 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 330 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:30,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 749 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:44:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-26 00:44:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 288. [2022-11-26 00:44:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 215 states have (on average 1.827906976744186) internal successors, (393), 273 states have internal predecessors, (393), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:30,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 413 transitions. [2022-11-26 00:44:30,180 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 413 transitions. Word has length 16 [2022-11-26 00:44:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:30,181 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 413 transitions. [2022-11-26 00:44:30,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:30,181 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 413 transitions. [2022-11-26 00:44:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:44:30,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:30,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:30,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:44:30,182 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:30,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:30,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1672340936, now seen corresponding path program 1 times [2022-11-26 00:44:30,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:30,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944382297] [2022-11-26 00:44:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:30,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:30,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:30,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944382297] [2022-11-26 00:44:30,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944382297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:30,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:30,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:44:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266226919] [2022-11-26 00:44:30,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:44:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:30,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:44:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:44:30,244 INFO L87 Difference]: Start difference. First operand 288 states and 413 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:30,572 INFO L93 Difference]: Finished difference Result 470 states and 612 transitions. [2022-11-26 00:44:30,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:44:30,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-26 00:44:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:30,575 INFO L225 Difference]: With dead ends: 470 [2022-11-26 00:44:30,575 INFO L226 Difference]: Without dead ends: 470 [2022-11-26 00:44:30,575 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 [2022-11-26 00:44:30,576 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 225 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:30,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 275 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-26 00:44:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 304. [2022-11-26 00:44:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 231 states have (on average 1.8571428571428572) internal successors, (429), 289 states have internal predecessors, (429), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 449 transitions. [2022-11-26 00:44:30,585 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 449 transitions. Word has length 17 [2022-11-26 00:44:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:30,585 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 449 transitions. [2022-11-26 00:44:30,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 449 transitions. [2022-11-26 00:44:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:44:30,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:30,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:30,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:44:30,587 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1672340935, now seen corresponding path program 1 times [2022-11-26 00:44:30,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:30,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854329947] [2022-11-26 00:44:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:30,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:30,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:30,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854329947] [2022-11-26 00:44:30,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854329947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:30,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:30,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:44:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090366035] [2022-11-26 00:44:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:30,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:30,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:30,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:30,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:30,787 INFO L87 Difference]: Start difference. First operand 304 states and 449 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:31,084 INFO L93 Difference]: Finished difference Result 351 states and 467 transitions. [2022-11-26 00:44:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:31,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-26 00:44:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:31,086 INFO L225 Difference]: With dead ends: 351 [2022-11-26 00:44:31,086 INFO L226 Difference]: Without dead ends: 351 [2022-11-26 00:44:31,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:44:31,086 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 299 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:31,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 344 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-26 00:44:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 304. [2022-11-26 00:44:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 231 states have (on average 1.8181818181818181) internal successors, (420), 289 states have internal predecessors, (420), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 440 transitions. [2022-11-26 00:44:31,094 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 440 transitions. Word has length 17 [2022-11-26 00:44:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:31,095 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 440 transitions. [2022-11-26 00:44:31,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 440 transitions. [2022-11-26 00:44:31,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:44:31,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:31,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:31,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:44:31,096 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:31,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1994273498, now seen corresponding path program 1 times [2022-11-26 00:44:31,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:31,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941017960] [2022-11-26 00:44:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:31,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:31,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:31,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941017960] [2022-11-26 00:44:31,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941017960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:31,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:31,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:44:31,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220379251] [2022-11-26 00:44:31,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:31,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:31,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:31,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:31,182 INFO L87 Difference]: Start difference. First operand 304 states and 440 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:31,350 INFO L93 Difference]: Finished difference Result 464 states and 649 transitions. [2022-11-26 00:44:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:44:31,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-26 00:44:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:31,354 INFO L225 Difference]: With dead ends: 464 [2022-11-26 00:44:31,354 INFO L226 Difference]: Without dead ends: 464 [2022-11-26 00:44:31,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:31,354 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 124 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:31,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 431 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:31,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-11-26 00:44:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 322. [2022-11-26 00:44:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 249 states have (on average 1.7791164658634537) internal successors, (443), 307 states have internal predecessors, (443), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:31,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 463 transitions. [2022-11-26 00:44:31,365 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 463 transitions. Word has length 17 [2022-11-26 00:44:31,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:31,365 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 463 transitions. [2022-11-26 00:44:31,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 463 transitions. [2022-11-26 00:44:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:44:31,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:31,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:31,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:44:31,367 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:31,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1994273304, now seen corresponding path program 1 times [2022-11-26 00:44:31,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:31,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374203441] [2022-11-26 00:44:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:31,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:31,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:31,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374203441] [2022-11-26 00:44:31,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374203441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:31,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:31,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:44:31,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894408938] [2022-11-26 00:44:31,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:31,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:44:31,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:31,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:44:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:31,789 INFO L87 Difference]: Start difference. First operand 322 states and 463 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:32,070 INFO L93 Difference]: Finished difference Result 361 states and 473 transitions. [2022-11-26 00:44:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:44:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-26 00:44:32,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:32,072 INFO L225 Difference]: With dead ends: 361 [2022-11-26 00:44:32,072 INFO L226 Difference]: Without dead ends: 361 [2022-11-26 00:44:32,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:44:32,073 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 458 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:32,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 440 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-26 00:44:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 321. [2022-11-26 00:44:32,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 249 states have (on average 1.7550200803212852) internal successors, (437), 306 states have internal predecessors, (437), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 457 transitions. [2022-11-26 00:44:32,081 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 457 transitions. Word has length 17 [2022-11-26 00:44:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:32,081 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 457 transitions. [2022-11-26 00:44:32,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 457 transitions. [2022-11-26 00:44:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:44:32,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:32,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:32,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 00:44:32,083 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:32,083 INFO L85 PathProgramCache]: Analyzing trace with hash 911978932, now seen corresponding path program 1 times [2022-11-26 00:44:32,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:32,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693992362] [2022-11-26 00:44:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:32,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:32,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:32,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693992362] [2022-11-26 00:44:32,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693992362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:32,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:32,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:44:32,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653433459] [2022-11-26 00:44:32,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:32,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:44:32,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:44:32,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:44:32,305 INFO L87 Difference]: Start difference. First operand 321 states and 457 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:32,748 INFO L93 Difference]: Finished difference Result 484 states and 657 transitions. [2022-11-26 00:44:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:44:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-26 00:44:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:32,773 INFO L225 Difference]: With dead ends: 484 [2022-11-26 00:44:32,773 INFO L226 Difference]: Without dead ends: 484 [2022-11-26 00:44:32,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:44:32,773 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 408 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:32,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 727 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-26 00:44:32,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 319. [2022-11-26 00:44:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 249 states have (on average 1.7228915662650603) internal successors, (429), 304 states have internal predecessors, (429), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:44:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 449 transitions. [2022-11-26 00:44:32,786 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 449 transitions. Word has length 20 [2022-11-26 00:44:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:32,786 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 449 transitions. [2022-11-26 00:44:32,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:32,787 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 449 transitions. [2022-11-26 00:44:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:44:32,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:32,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:32,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-26 00:44:32,789 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:32,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:32,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1793421404, now seen corresponding path program 1 times [2022-11-26 00:44:32,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:32,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382883353] [2022-11-26 00:44:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:32,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:33,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:33,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382883353] [2022-11-26 00:44:33,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382883353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:33,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:33,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:44:33,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052452785] [2022-11-26 00:44:33,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:33,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:44:33,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:33,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:44:33,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:33,088 INFO L87 Difference]: Start difference. First operand 319 states and 449 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:33,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:33,415 INFO L93 Difference]: Finished difference Result 359 states and 459 transitions. [2022-11-26 00:44:33,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:44:33,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-26 00:44:33,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:33,417 INFO L225 Difference]: With dead ends: 359 [2022-11-26 00:44:33,417 INFO L226 Difference]: Without dead ends: 359 [2022-11-26 00:44:33,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:44:33,418 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 150 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:33,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 770 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-26 00:44:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 239. [2022-11-26 00:44:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 175 states have (on average 1.72) internal successors, (301), 229 states have internal predecessors, (301), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:44:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 313 transitions. [2022-11-26 00:44:33,425 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 313 transitions. Word has length 21 [2022-11-26 00:44:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:33,426 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 313 transitions. [2022-11-26 00:44:33,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 313 transitions. [2022-11-26 00:44:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:44:33,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:33,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:33,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 00:44:33,427 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:33,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:33,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1900680291, now seen corresponding path program 1 times [2022-11-26 00:44:33,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:33,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012710022] [2022-11-26 00:44:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:33,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:33,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:33,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012710022] [2022-11-26 00:44:33,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012710022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:33,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:33,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:33,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815456438] [2022-11-26 00:44:33,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:33,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:33,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:33,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:33,514 INFO L87 Difference]: Start difference. First operand 239 states and 313 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:33,726 INFO L93 Difference]: Finished difference Result 312 states and 393 transitions. [2022-11-26 00:44:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:33,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-26 00:44:33,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:33,728 INFO L225 Difference]: With dead ends: 312 [2022-11-26 00:44:33,728 INFO L226 Difference]: Without dead ends: 312 [2022-11-26 00:44:33,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:33,729 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 302 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:33,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 276 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-26 00:44:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 238. [2022-11-26 00:44:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 175 states have (on average 1.7085714285714286) internal successors, (299), 228 states have internal predecessors, (299), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:44:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 311 transitions. [2022-11-26 00:44:33,738 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 311 transitions. Word has length 21 [2022-11-26 00:44:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:33,738 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 311 transitions. [2022-11-26 00:44:33,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 311 transitions. [2022-11-26 00:44:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:44:33,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:33,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:33,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 00:44:33,740 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:33,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:33,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1900680292, now seen corresponding path program 1 times [2022-11-26 00:44:33,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:33,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092695122] [2022-11-26 00:44:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:33,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:33,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092695122] [2022-11-26 00:44:33,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092695122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:33,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:33,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:33,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92265733] [2022-11-26 00:44:33,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:33,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:33,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:33,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:33,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:33,958 INFO L87 Difference]: Start difference. First operand 238 states and 311 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:34,129 INFO L93 Difference]: Finished difference Result 237 states and 309 transitions. [2022-11-26 00:44:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:34,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-26 00:44:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:34,132 INFO L225 Difference]: With dead ends: 237 [2022-11-26 00:44:34,132 INFO L226 Difference]: Without dead ends: 237 [2022-11-26 00:44:34,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:44:34,133 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 324 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:34,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 166 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:44:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-26 00:44:34,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-11-26 00:44:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 175 states have (on average 1.697142857142857) internal successors, (297), 227 states have internal predecessors, (297), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:44:34,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 309 transitions. [2022-11-26 00:44:34,141 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 309 transitions. Word has length 21 [2022-11-26 00:44:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:34,141 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 309 transitions. [2022-11-26 00:44:34,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 309 transitions. [2022-11-26 00:44:34,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:44:34,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:34,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:34,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:44:34,143 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1192662212, now seen corresponding path program 1 times [2022-11-26 00:44:34,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:34,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86909545] [2022-11-26 00:44:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:34,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:34,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86909545] [2022-11-26 00:44:34,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86909545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:34,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:34,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:34,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206966562] [2022-11-26 00:44:34,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:34,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:34,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:34,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:34,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:34,251 INFO L87 Difference]: Start difference. First operand 237 states and 309 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:34,501 INFO L93 Difference]: Finished difference Result 543 states and 669 transitions. [2022-11-26 00:44:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:34,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-26 00:44:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:34,503 INFO L225 Difference]: With dead ends: 543 [2022-11-26 00:44:34,504 INFO L226 Difference]: Without dead ends: 543 [2022-11-26 00:44:34,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:34,504 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 501 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:34,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 254 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-26 00:44:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 234. [2022-11-26 00:44:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 175 states have (on average 1.6628571428571428) internal successors, (291), 224 states have internal predecessors, (291), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:44:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 303 transitions. [2022-11-26 00:44:34,515 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 303 transitions. Word has length 23 [2022-11-26 00:44:34,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:34,516 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 303 transitions. [2022-11-26 00:44:34,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 303 transitions. [2022-11-26 00:44:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:44:34,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:34,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:34,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-26 00:44:34,518 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:34,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:34,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1192662213, now seen corresponding path program 1 times [2022-11-26 00:44:34,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:34,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638103362] [2022-11-26 00:44:34,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:34,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:34,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:34,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638103362] [2022-11-26 00:44:34,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638103362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:34,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:34,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:44:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127236064] [2022-11-26 00:44:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:34,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:34,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:34,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:34,706 INFO L87 Difference]: Start difference. First operand 234 states and 303 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:35,003 INFO L93 Difference]: Finished difference Result 393 states and 501 transitions. [2022-11-26 00:44:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:44:35,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-26 00:44:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:35,005 INFO L225 Difference]: With dead ends: 393 [2022-11-26 00:44:35,005 INFO L226 Difference]: Without dead ends: 393 [2022-11-26 00:44:35,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:44:35,006 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 699 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:35,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 267 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-26 00:44:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 233. [2022-11-26 00:44:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 175 states have (on average 1.6514285714285715) internal successors, (289), 223 states have internal predecessors, (289), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:44:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 301 transitions. [2022-11-26 00:44:35,013 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 301 transitions. Word has length 23 [2022-11-26 00:44:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:35,013 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 301 transitions. [2022-11-26 00:44:35,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 301 transitions. [2022-11-26 00:44:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:44:35,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:35,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:35,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-26 00:44:35,014 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:35,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1192662374, now seen corresponding path program 1 times [2022-11-26 00:44:35,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:35,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121470269] [2022-11-26 00:44:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:35,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:35,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:35,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121470269] [2022-11-26 00:44:35,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121470269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:35,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:35,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:44:35,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249075742] [2022-11-26 00:44:35,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:35,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:44:35,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:44:35,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:44:35,290 INFO L87 Difference]: Start difference. First operand 233 states and 301 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:35,628 INFO L93 Difference]: Finished difference Result 360 states and 411 transitions. [2022-11-26 00:44:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:44:35,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-26 00:44:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:35,630 INFO L225 Difference]: With dead ends: 360 [2022-11-26 00:44:35,630 INFO L226 Difference]: Without dead ends: 360 [2022-11-26 00:44:35,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:35,631 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 469 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:35,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 205 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:44:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-11-26 00:44:35,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 233. [2022-11-26 00:44:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 175 states have (on average 1.64) internal successors, (287), 223 states have internal predecessors, (287), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:44:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 299 transitions. [2022-11-26 00:44:35,638 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 299 transitions. Word has length 23 [2022-11-26 00:44:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:35,638 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 299 transitions. [2022-11-26 00:44:35,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:35,639 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 299 transitions. [2022-11-26 00:44:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-26 00:44:35,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:35,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:35,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-26 00:44:35,640 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:35,641 INFO L85 PathProgramCache]: Analyzing trace with hash 908246795, now seen corresponding path program 1 times [2022-11-26 00:44:35,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:35,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702200985] [2022-11-26 00:44:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:35,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:35,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:35,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702200985] [2022-11-26 00:44:35,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702200985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:35,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:35,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:44:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140921672] [2022-11-26 00:44:35,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:35,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:35,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:35,885 INFO L87 Difference]: Start difference. First operand 233 states and 299 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:36,106 INFO L93 Difference]: Finished difference Result 231 states and 296 transitions. [2022-11-26 00:44:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:44:36,107 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-11-26 00:44:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:36,108 INFO L225 Difference]: With dead ends: 231 [2022-11-26 00:44:36,108 INFO L226 Difference]: Without dead ends: 231 [2022-11-26 00:44:36,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:44:36,109 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 311 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:36,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 186 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-26 00:44:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-26 00:44:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 175 states have (on average 1.6228571428571428) internal successors, (284), 221 states have internal predecessors, (284), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:44:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 296 transitions. [2022-11-26 00:44:36,115 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 296 transitions. Word has length 33 [2022-11-26 00:44:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:36,115 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 296 transitions. [2022-11-26 00:44:36,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:44:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 296 transitions. [2022-11-26 00:44:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:44:36,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:36,117 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:36,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 00:44:36,117 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:36,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:36,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1580414205, now seen corresponding path program 1 times [2022-11-26 00:44:36,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:36,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932932966] [2022-11-26 00:44:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:36,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:44:36,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:36,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932932966] [2022-11-26 00:44:36,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932932966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:36,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:44:36,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:44:36,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54215962] [2022-11-26 00:44:36,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:36,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:44:36,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:36,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:44:36,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:44:36,360 INFO L87 Difference]: Start difference. First operand 231 states and 296 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:44:36,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:36,607 INFO L93 Difference]: Finished difference Result 276 states and 353 transitions. [2022-11-26 00:44:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:44:36,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-11-26 00:44:36,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:36,609 INFO L225 Difference]: With dead ends: 276 [2022-11-26 00:44:36,609 INFO L226 Difference]: Without dead ends: 276 [2022-11-26 00:44:36,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:44:36,610 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 275 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:36,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 198 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:44:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-26 00:44:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 229. [2022-11-26 00:44:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 175 states have (on average 1.6) internal successors, (280), 219 states have internal predecessors, (280), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:44:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 292 transitions. [2022-11-26 00:44:36,616 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 292 transitions. Word has length 34 [2022-11-26 00:44:36,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:36,617 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 292 transitions. [2022-11-26 00:44:36,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:44:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 292 transitions. [2022-11-26 00:44:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-26 00:44:36,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:36,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:36,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-26 00:44:36,618 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:36,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash -102540457, now seen corresponding path program 1 times [2022-11-26 00:44:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:36,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478326248] [2022-11-26 00:44:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:36,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:44:40,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:40,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478326248] [2022-11-26 00:44:40,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478326248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:40,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629587510] [2022-11-26 00:44:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:40,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:40,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:40,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:40,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:44:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:40,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-26 00:44:40,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:40,710 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:44:40,711 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 11 treesize of output 11 [2022-11-26 00:44:40,932 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 15 treesize of output 11 [2022-11-26 00:44:40,938 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 15 treesize of output 11 [2022-11-26 00:44:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:41,185 INFO L321 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-11-26 00:44:41,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 87 [2022-11-26 00:44:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:41,222 INFO L321 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-11-26 00:44:41,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 71 [2022-11-26 00:44:41,445 INFO L321 Elim1Store]: treesize reduction 60, result has 27.7 percent of original size [2022-11-26 00:44:41,446 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 3 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 00:44:41,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:41,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:41,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:41,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 00:44:41,563 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 29 treesize of output 29 [2022-11-26 00:44:41,572 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 29 treesize of output 29 [2022-11-26 00:44:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:41,647 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-11-26 00:44:41,653 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:44:41,653 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-11-26 00:44:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:41,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:44:41,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629587510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:44:41,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:44:41,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [18] total 28 [2022-11-26 00:44:41,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726913575] [2022-11-26 00:44:41,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:44:41,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:44:41,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:44:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=694, Unknown=0, NotChecked=0, Total=756 [2022-11-26 00:44:41,709 INFO L87 Difference]: Start difference. First operand 229 states and 292 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:44:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:44,230 INFO L93 Difference]: Finished difference Result 560 states and 634 transitions. [2022-11-26 00:44:44,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:44:44,231 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-26 00:44:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:44,233 INFO L225 Difference]: With dead ends: 560 [2022-11-26 00:44:44,233 INFO L226 Difference]: Without dead ends: 560 [2022-11-26 00:44:44,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:44:44,235 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 585 mSDsluCounter, 1357 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:44,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1532 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:44:44,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-26 00:44:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 232. [2022-11-26 00:44:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 178 states have (on average 1.5898876404494382) internal successors, (283), 222 states have internal predecessors, (283), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:44:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 295 transitions. [2022-11-26 00:44:44,243 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 295 transitions. Word has length 35 [2022-11-26 00:44:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:44,243 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 295 transitions. [2022-11-26 00:44:44,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:44:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 295 transitions. [2022-11-26 00:44:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:44:44,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:44,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:44,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:44:44,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-26 00:44:44,450 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:44:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash 867030942, now seen corresponding path program 1 times [2022-11-26 00:44:44,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:44:44,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897456899] [2022-11-26 00:44:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:44,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:44:44,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:44:46,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:44:46,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897456899] [2022-11-26 00:44:46,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897456899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:44:46,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191151034] [2022-11-26 00:44:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:44:46,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:46,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:46,618 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:46,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:44:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:44:46,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-26 00:44:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:46,940 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:44:46,940 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 11 treesize of output 11 [2022-11-26 00:44:47,139 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 16 treesize of output 18 [2022-11-26 00:44:47,150 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 16 treesize of output 18 [2022-11-26 00:44:47,203 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 16 treesize of output 18 [2022-11-26 00:44:47,214 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 16 treesize of output 18 [2022-11-26 00:44:47,240 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 16 treesize of output 18 [2022-11-26 00:44:47,254 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 16 treesize of output 18 [2022-11-26 00:44:47,379 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:44:47,379 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 21 treesize of output 26 [2022-11-26 00:44:47,398 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:44:47,399 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 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-26 00:44:47,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:47,717 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-11-26 00:44:47,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 56 [2022-11-26 00:44:47,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:47,729 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 64 treesize of output 63 [2022-11-26 00:44:48,652 INFO L321 Elim1Store]: treesize reduction 76, result has 52.2 percent of original size [2022-11-26 00:44:48,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 147 treesize of output 206 [2022-11-26 00:44:49,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:44:49,521 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 231 treesize of output 224 [2022-11-26 00:44:50,630 INFO L321 Elim1Store]: treesize reduction 28, result has 82.8 percent of original size [2022-11-26 00:44:50,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 169 treesize of output 217 [2022-11-26 00:45:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:09,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:45:09,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191151034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:45:09,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [459816578] [2022-11-26 00:45:09,948 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-26 00:45:09,949 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:45:09,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:45:09,961 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:45:09,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:45:10,253 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-11-26 00:45:10,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 214 treesize of output 216 [2022-11-26 00:45:10,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:10,554 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:45:10,555 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:45:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:10,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:10,624 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:45:10,624 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:45:10,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:10,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:10,687 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:45:10,687 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:45:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:10,887 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:45:10,888 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:45:10,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:10,932 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:45:10,932 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:45:10,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,018 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:45:11,019 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:45:11,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-11-26 00:45:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,233 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:45:11,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:45:11,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,325 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:45:11,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:45:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:11,576 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-11-26 00:45:11,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 255 [2022-11-26 00:45:11,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:11,691 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-11-26 00:45:11,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-11-26 00:45:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:11,735 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-26 00:45:11,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 228 treesize of output 214 [2022-11-26 00:45:12,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:12,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:12,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:12,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:12,448 INFO L321 Elim1Store]: treesize reduction 294, result has 12.2 percent of original size [2022-11-26 00:45:12,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 703 treesize of output 676 [2022-11-26 00:45:12,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:45:12,510 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 2 case distinctions, treesize of input 664 treesize of output 610 [2022-11-26 00:45:12,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:12,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:12,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:12,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:12,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:12,617 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-11-26 00:45:12,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 687 treesize of output 622 [2022-11-26 00:45:13,783 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:45:13,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:45:13,919 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:45:13,920 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:45:13,953 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:45:13,954 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:45:13,972 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 [2022-11-26 00:45:14,045 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 [2022-11-26 00:45:14,061 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 [2022-11-26 00:45:14,074 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 [2022-11-26 00:45:14,105 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 [2022-11-26 00:45:14,134 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:45:14,134 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 31 treesize of output 21 [2022-11-26 00:45:14,173 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:45:14,173 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 31 treesize of output 21 [2022-11-26 00:45:14,274 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:45:14,274 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 29 treesize of output 40 [2022-11-26 00:45:14,329 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:45:14,329 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 29 treesize of output 40 [2022-11-26 00:45:14,377 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:45:14,377 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 25 treesize of output 23 [2022-11-26 00:45:14,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:14,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:14,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:14,575 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:45:14,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:45:14,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:14,606 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 43 treesize of output 23 [2022-11-26 00:45:14,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:14,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:14,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:14,719 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:45:14,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:45:16,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:45:16,895 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:45:17,041 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:45:17,041 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:45:17,060 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 [2022-11-26 00:45:17,088 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:45:17,088 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:45:17,134 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 [2022-11-26 00:45:17,146 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 [2022-11-26 00:45:17,159 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 [2022-11-26 00:45:17,214 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:45:17,214 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 31 treesize of output 21 [2022-11-26 00:45:17,226 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 [2022-11-26 00:45:17,255 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:45:17,256 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 31 treesize of output 21 [2022-11-26 00:45:17,351 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:45:17,352 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 29 treesize of output 40 [2022-11-26 00:45:17,399 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:45:17,400 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 25 treesize of output 23 [2022-11-26 00:45:17,442 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:45:17,442 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 29 treesize of output 40 [2022-11-26 00:45:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:45:17,542 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 43 treesize of output 23 [2022-11-26 00:45:17,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:17,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:17,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:17,623 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:45:17,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:45:17,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:17,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:17,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:45:17,738 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:45:17,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:45:18,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:45:18,607 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:45:18,868 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-11-26 00:45:18,876 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:45:28,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18460#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= |~#list~0.base| 3) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (not (= (select |#valid| |ULTIMATE.start_create_item_#t~mem7#1.base|) 1)) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (<= |#NULL.offset| 0) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) |ULTIMATE.start_create_item_#t~short10#1| (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-26 00:45:28,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:45:28,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:45:28,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2022-11-26 00:45:28,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443330140] [2022-11-26 00:45:28,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:45:28,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:45:28,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:45:28,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:45:28,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2750, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:45:28,552 INFO L87 Difference]: Start difference. First operand 232 states and 295 transitions. Second operand has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:45:36,233 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 42 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:45:41,932 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:45:59,012 WARN L233 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 73 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:46:06,074 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 76 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:46:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:07,570 INFO L93 Difference]: Finished difference Result 501 states and 598 transitions. [2022-11-26 00:46:07,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-26 00:46:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2022-11-26 00:46:07,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:07,574 INFO L225 Difference]: With dead ends: 501 [2022-11-26 00:46:07,574 INFO L226 Difference]: Without dead ends: 501 [2022-11-26 00:46:07,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 47.8s TimeCoverageRelationStatistics Valid=644, Invalid=6328, Unknown=0, NotChecked=0, Total=6972 [2022-11-26 00:46:07,577 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 1185 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:07,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1188 Valid, 1575 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1956 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-26 00:46:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-26 00:46:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 270. [2022-11-26 00:46:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 213 states have (on average 1.5305164319248827) internal successors, (326), 257 states have internal predecessors, (326), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 00:46:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 342 transitions. [2022-11-26 00:46:07,585 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 342 transitions. Word has length 36 [2022-11-26 00:46:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:07,586 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 342 transitions. [2022-11-26 00:46:07,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 25 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:46:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 342 transitions. [2022-11-26 00:46:07,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:46:07,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:07,587 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:07,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:46:07,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-26 00:46:07,793 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:46:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:07,794 INFO L85 PathProgramCache]: Analyzing trace with hash 867030943, now seen corresponding path program 1 times [2022-11-26 00:46:07,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:07,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691980517] [2022-11-26 00:46:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:07,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:46:11,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691980517] [2022-11-26 00:46:11,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691980517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249006829] [2022-11-26 00:46:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:11,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:46:11,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:46:11,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:46:11,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:46:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:11,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 137 conjunts are in the unsatisfiable core [2022-11-26 00:46:11,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:46:11,751 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:46:11,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 00:46:11,769 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:46:12,180 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 16 treesize of output 18 [2022-11-26 00:46:12,207 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 16 treesize of output 18 [2022-11-26 00:46:12,325 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 16 treesize of output 18 [2022-11-26 00:46:12,336 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 16 treesize of output 18 [2022-11-26 00:46:12,383 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 16 treesize of output 18 [2022-11-26 00:46:12,408 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 16 treesize of output 18 [2022-11-26 00:46:12,637 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2022-11-26 00:46:12,638 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 1 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:46:12,658 INFO L321 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-11-26 00:46:12,659 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 27 treesize of output 26 [2022-11-26 00:46:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:12,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:12,876 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 43 [2022-11-26 00:46:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:12,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 66 [2022-11-26 00:46:13,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:13,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2022-11-26 00:46:13,679 INFO L321 Elim1Store]: treesize reduction 8, result has 73.3 percent of original size [2022-11-26 00:46:13,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 31 [2022-11-26 00:46:14,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:14,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:14,065 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-11-26 00:46:14,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 23 [2022-11-26 00:46:14,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:14,081 INFO L321 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2022-11-26 00:46:14,082 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 13 [2022-11-26 00:46:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:14,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:46:15,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249006829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:15,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [74816100] [2022-11-26 00:46:15,076 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-26 00:46:15,076 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:46:15,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:46:15,077 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:46:15,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:46:15,238 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-11-26 00:46:15,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 214 treesize of output 216 [2022-11-26 00:46:15,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:15,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:15,519 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:46:15,520 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:46:15,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:15,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:15,593 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:46:15,594 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:46:15,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:15,629 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:46:15,629 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:46:15,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:15,786 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:46:15,787 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:46:15,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:15,850 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:46:15,851 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:46:15,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:15,887 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:46:15,888 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:46:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,086 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:46:16,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:46:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-11-26 00:46:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,170 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:46:16,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:46:16,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:16,440 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-11-26 00:46:16,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-11-26 00:46:16,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:16,545 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-11-26 00:46:16,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 235 [2022-11-26 00:46:16,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:16,600 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-26 00:46:16,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 228 treesize of output 214 [2022-11-26 00:46:17,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:17,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:17,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:17,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:17,163 INFO L321 Elim1Store]: treesize reduction 294, result has 12.2 percent of original size [2022-11-26 00:46:17,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 504 treesize of output 485 [2022-11-26 00:46:17,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:17,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:17,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:17,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:46:17,237 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 2 case distinctions, treesize of input 473 treesize of output 435 [2022-11-26 00:46:17,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:17,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:17,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:17,360 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-11-26 00:46:17,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 496 treesize of output 451 [2022-11-26 00:46:18,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:46:18,340 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:46:18,446 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:46:18,446 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:46:18,485 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:46:18,485 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:46:18,501 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 [2022-11-26 00:46:18,554 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 [2022-11-26 00:46:18,571 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 [2022-11-26 00:46:18,582 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 [2022-11-26 00:46:18,626 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:46:18,626 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 31 treesize of output 21 [2022-11-26 00:46:18,664 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:46:18,664 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 31 treesize of output 21 [2022-11-26 00:46:18,681 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 [2022-11-26 00:46:18,766 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:46:18,767 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 29 treesize of output 40 [2022-11-26 00:46:18,822 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:46:18,822 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 29 treesize of output 40 [2022-11-26 00:46:18,869 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:46:18,870 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 25 treesize of output 23 [2022-11-26 00:46:18,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:18,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:18,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:19,032 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:46:19,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:46:19,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:19,071 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 43 treesize of output 23 [2022-11-26 00:46:19,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:19,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:19,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:19,159 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:46:19,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:46:21,919 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:46:21,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:46:22,071 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:46:22,072 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:46:22,085 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 [2022-11-26 00:46:22,120 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:46:22,121 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:46:22,170 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 [2022-11-26 00:46:22,183 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 [2022-11-26 00:46:22,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-26 00:46:22,240 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:46:22,240 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 31 treesize of output 21 [2022-11-26 00:46:22,285 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:46:22,285 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 31 treesize of output 21 [2022-11-26 00:46:22,298 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 [2022-11-26 00:46:22,369 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:46:22,369 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 25 treesize of output 23 [2022-11-26 00:46:22,414 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:46:22,414 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 29 treesize of output 40 [2022-11-26 00:46:22,459 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:46:22,459 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 29 treesize of output 40 [2022-11-26 00:46:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:22,555 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 43 treesize of output 23 [2022-11-26 00:46:22,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:22,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:22,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:22,655 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:46:22,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:46:22,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:22,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:22,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:22,754 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:46:22,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:46:23,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:46:23,491 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:46:23,688 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-11-26 00:46:23,696 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:46:33,891 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19474#(and (<= |~#list~0.base| 3) (= |~#list~0.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (< |ULTIMATE.start_create_item_~item~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_item_~item~0#1.base| 0)) (<= 0 |#NULL.base|) (= |ULTIMATE.start_append_one_~cursor~0#1.offset| |ULTIMATE.start_create_item_#in~cursor#1.offset|) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (or (not (= |ULTIMATE.start_create_item_#t~mem8#1.offset| 0)) (not (= |ULTIMATE.start_create_item_#t~mem8#1.base| 0))) (= |ULTIMATE.start_create_item_#in~at#1| |ULTIMATE.start_append_one_~to#1|) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (= |ULTIMATE.start_create_item_~cursor#1.offset| |ULTIMATE.start_create_item_#in~cursor#1.offset|) (= |ULTIMATE.start_create_item_~cursor#1.base| |ULTIMATE.start_create_item_#in~cursor#1.base|) (= 265 (select |#length| |ULTIMATE.start_create_item_~item~0#1.base|)) (<= |#NULL.offset| 0) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (or (and (not (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_create_item_~at#1|)) (or (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_create_item_~link_field~0#1|) (= |ULTIMATE.start_create_item_~term_field~0#1| ~unnamed2~0~ITEM_NEXT)) (not (= ~unnamed1~0~LIST_END |ULTIMATE.start_create_item_~at#1|)))) (and (= |ULTIMATE.start_create_item_~term_field~0#1| ~unnamed2~0~ITEM_PREV) (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_create_item_~link_field~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_create_item_~at#1|))) (= |ULTIMATE.start_create_item_#t~mem8#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|)) (= |ULTIMATE.start_append_one_~list#1.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (= |ULTIMATE.start_append_one_#in~list#1.base| |ULTIMATE.start_append_one_~list#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (= |ULTIMATE.start_create_item_~at#1| |ULTIMATE.start_create_item_#in~at#1|) (= |ULTIMATE.start_append_one_~cursor~0#1.base| |ULTIMATE.start_append_one_~list#1.base|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_append_one_~to#1|) (<= |#NULL.base| 0) |ULTIMATE.start_create_item_#t~short10#1| (= |ULTIMATE.start_append_one_~cursor~0#1.offset| (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |ULTIMATE.start_append_one_~list#1.offset|)) (or (not (<= 0 (+ (* 4 |ULTIMATE.start_create_item_~link_field~0#1|) |ULTIMATE.start_create_item_#t~mem7#1.offset|))) (not (<= (+ (* 4 |ULTIMATE.start_create_item_~link_field~0#1|) |ULTIMATE.start_create_item_#t~mem7#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_#t~mem7#1.base|)))) (= |ULTIMATE.start_append_one_#in~list#1.base| |~#list~0.base|) (= 1 (select |#valid| |ULTIMATE.start_create_item_~item~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem8#1.offset|) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_main_#t~ret30#1|) (<= |~#list~0.offset| 0) (= |ULTIMATE.start_append_one_~cursor~0#1.base| |ULTIMATE.start_create_item_#in~cursor#1.base|))' at error location [2022-11-26 00:46:33,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:46:33,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:46:33,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2022-11-26 00:46:33,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299619249] [2022-11-26 00:46:33,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:46:33,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:46:33,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:33,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:46:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=3404, Unknown=0, NotChecked=0, Total=3660 [2022-11-26 00:46:33,895 INFO L87 Difference]: Start difference. First operand 270 states and 342 transitions. Second operand has 31 states, 27 states have (on average 2.185185185185185) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:46:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:41,122 INFO L93 Difference]: Finished difference Result 497 states and 593 transitions. [2022-11-26 00:46:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:46:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 2.185185185185185) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2022-11-26 00:46:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:41,124 INFO L225 Difference]: With dead ends: 497 [2022-11-26 00:46:41,124 INFO L226 Difference]: Without dead ends: 497 [2022-11-26 00:46:41,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=626, Invalid=6346, Unknown=0, NotChecked=0, Total=6972 [2022-11-26 00:46:41,126 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1588 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 2358 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:41,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1589 Valid, 1582 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2358 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-26 00:46:41,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-11-26 00:46:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 291. [2022-11-26 00:46:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 231 states have (on average 1.5064935064935066) internal successors, (348), 275 states have internal predecessors, (348), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:46:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 368 transitions. [2022-11-26 00:46:41,135 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 368 transitions. Word has length 36 [2022-11-26 00:46:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:41,135 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 368 transitions. [2022-11-26 00:46:41,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 2.185185185185185) internal successors, (59), 28 states have internal predecessors, (59), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:46:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 368 transitions. [2022-11-26 00:46:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:46:41,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:41,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:41,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 00:46:41,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:46:41,343 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:46:41,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:41,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1916423736, now seen corresponding path program 1 times [2022-11-26 00:46:41,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:41,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388259535] [2022-11-26 00:46:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:41,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:43,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388259535] [2022-11-26 00:46:43,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388259535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:43,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601116261] [2022-11-26 00:46:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:43,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:46:43,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:46:43,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:46:43,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:46:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:43,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-26 00:46:43,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:46:43,356 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:46:43,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 00:46:43,591 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 16 treesize of output 18 [2022-11-26 00:46:43,601 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 16 treesize of output 18 [2022-11-26 00:46:43,672 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 16 treesize of output 18 [2022-11-26 00:46:43,690 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 16 treesize of output 18 [2022-11-26 00:46:43,725 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 16 treesize of output 18 [2022-11-26 00:46:43,733 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 16 treesize of output 18 [2022-11-26 00:46:43,858 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-26 00:46:43,859 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 21 treesize of output 20 [2022-11-26 00:46:43,879 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:46:43,879 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 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-26 00:46:44,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:44,104 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-11-26 00:46:44,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 54 [2022-11-26 00:46:44,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:44,124 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-11-26 00:46:44,125 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 71 treesize of output 81 [2022-11-26 00:46:44,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:44,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:46:44,543 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 42 [2022-11-26 00:46:44,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:44,560 INFO L321 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2022-11-26 00:46:44,560 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 13 [2022-11-26 00:46:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:44,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:46:48,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601116261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:48,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829202110] [2022-11-26 00:46:48,083 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:46:48,083 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:46:48,084 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:46:48,084 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:46:48,084 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:46:48,328 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-11-26 00:46:48,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 214 treesize of output 216 [2022-11-26 00:46:48,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:48,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:48,627 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:46:48,627 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:46:48,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:48,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:48,690 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:46:48,691 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:46:48,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:48,728 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:46:48,729 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:46:48,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:48,898 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:46:48,899 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:46:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:48,942 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:46:48,943 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:46:48,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,009 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:46:49,009 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:46:49,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,159 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:46:49,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:46:49,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-11-26 00:46:49,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,248 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:46:49,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:46:49,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:49,491 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-11-26 00:46:49,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-11-26 00:46:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,539 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-26 00:46:49,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 228 treesize of output 214 [2022-11-26 00:46:49,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:49,638 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-11-26 00:46:49,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 235 [2022-11-26 00:46:49,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:49,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:49,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:49,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:49,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:50,021 INFO L321 Elim1Store]: treesize reduction 294, result has 12.2 percent of original size [2022-11-26 00:46:50,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 498 treesize of output 483 [2022-11-26 00:46:50,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:50,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:50,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:50,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:50,070 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:46:50,070 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 2 case distinctions, treesize of input 459 treesize of output 421 [2022-11-26 00:46:50,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:50,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:50,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:50,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:50,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:50,179 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-11-26 00:46:50,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 482 treesize of output 437 [2022-11-26 00:46:51,667 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:46:51,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:46:51,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:46:51,808 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 [2022-11-26 00:46:51,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:46:51,886 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 [2022-11-26 00:46:51,898 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 15 treesize of output 11 [2022-11-26 00:46:51,908 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 [2022-11-26 00:46:51,942 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 [2022-11-26 00:46:51,975 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:46:51,975 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 31 treesize of output 21 [2022-11-26 00:46:52,009 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:46:52,010 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 31 treesize of output 21 [2022-11-26 00:46:52,085 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:46:52,086 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 29 treesize of output 40 [2022-11-26 00:46:52,148 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:46:52,148 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 25 treesize of output 23 [2022-11-26 00:46:52,192 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:46:52,193 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 29 treesize of output 40 [2022-11-26 00:46:52,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:52,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:52,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:52,371 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:46:52,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:46:52,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:52,411 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 43 treesize of output 23 [2022-11-26 00:46:52,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:52,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:52,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:52,514 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:46:52,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:46:55,706 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:46:55,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:46:55,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:55,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:46:55,823 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 23 treesize of output 1 [2022-11-26 00:46:55,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:55,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:46:55,889 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 [2022-11-26 00:46:55,900 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 [2022-11-26 00:46:55,916 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 [2022-11-26 00:46:55,964 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:46:55,964 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 31 treesize of output 21 [2022-11-26 00:46:55,998 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:46:55,998 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 31 treesize of output 21 [2022-11-26 00:46:56,013 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 [2022-11-26 00:46:56,089 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:46:56,089 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 29 treesize of output 40 [2022-11-26 00:46:56,136 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:46:56,137 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 25 treesize of output 23 [2022-11-26 00:46:56,186 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:46:56,186 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 29 treesize of output 40 [2022-11-26 00:46:56,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:56,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:56,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:56,387 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:46:56,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:46:56,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:56,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:56,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:56,483 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:46:56,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:46:56,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:56,513 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 43 treesize of output 23 [2022-11-26 00:46:58,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:46:58,744 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:46:58,898 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-11-26 00:46:58,904 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:47:08,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20553#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~1#1.offset|) (= (select |#valid| |~#list~0.base|) 1) (or (not (= |ULTIMATE.start_main_~cursor~1#1.offset| 0)) (not (= |ULTIMATE.start_main_~cursor~1#1.base| 0))) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~cursor~1#1.base| (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|))) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (<= |#NULL.base| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~1#1.base|) 1)) (<= |~#list~0.offset| 0))' at error location [2022-11-26 00:47:08,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:08,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:47:08,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2022-11-26 00:47:08,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183027275] [2022-11-26 00:47:08,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:08,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:47:08,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:47:08,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2654, Unknown=2, NotChecked=0, Total=2862 [2022-11-26 00:47:08,698 INFO L87 Difference]: Start difference. First operand 291 states and 368 transitions. Second operand has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:47:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:15,661 INFO L93 Difference]: Finished difference Result 490 states and 586 transitions. [2022-11-26 00:47:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:47:15,662 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-11-26 00:47:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:15,664 INFO L225 Difference]: With dead ends: 490 [2022-11-26 00:47:15,664 INFO L226 Difference]: Without dead ends: 490 [2022-11-26 00:47:15,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=538, Invalid=4862, Unknown=2, NotChecked=0, Total=5402 [2022-11-26 00:47:15,666 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 1109 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 1721 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:15,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1109 Valid, 1359 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1721 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-26 00:47:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-11-26 00:47:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 299. [2022-11-26 00:47:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 240 states have (on average 1.5) internal successors, (360), 283 states have internal predecessors, (360), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-26 00:47:15,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 380 transitions. [2022-11-26 00:47:15,674 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 380 transitions. Word has length 36 [2022-11-26 00:47:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:15,674 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 380 transitions. [2022-11-26 00:47:15,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:47:15,674 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 380 transitions. [2022-11-26 00:47:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:47:15,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:15,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:15,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:15,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:15,881 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:47:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:15,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1916423737, now seen corresponding path program 1 times [2022-11-26 00:47:15,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:15,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137124390] [2022-11-26 00:47:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:15,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:47:18,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137124390] [2022-11-26 00:47:18,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137124390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123780720] [2022-11-26 00:47:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:18,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:18,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:18,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:18,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:47:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:18,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-26 00:47:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:18,631 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:47:18,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-26 00:47:18,659 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:47:18,906 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 16 treesize of output 18 [2022-11-26 00:47:18,935 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 16 treesize of output 18 [2022-11-26 00:47:19,017 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 16 treesize of output 18 [2022-11-26 00:47:19,027 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 16 treesize of output 18 [2022-11-26 00:47:19,049 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 16 treesize of output 18 [2022-11-26 00:47:19,058 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 16 treesize of output 18 [2022-11-26 00:47:19,215 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-26 00:47:19,215 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 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-26 00:47:19,232 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-26 00:47:19,232 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 21 treesize of output 20 [2022-11-26 00:47:19,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:19,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:19,549 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-11-26 00:47:19,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 54 [2022-11-26 00:47:19,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:19,574 INFO L321 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2022-11-26 00:47:19,574 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 71 treesize of output 81 [2022-11-26 00:47:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:19,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:19,981 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 42 [2022-11-26 00:47:19,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:19,997 INFO L321 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2022-11-26 00:47:19,998 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 13 [2022-11-26 00:47:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:47:20,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:29,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:29,217 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 379 treesize of output 384 [2022-11-26 00:47:31,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123780720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:31,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [679233418] [2022-11-26 00:47:31,638 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:47:31,639 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:31,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:31,639 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:31,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:31,862 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-11-26 00:47:31,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 214 treesize of output 216 [2022-11-26 00:47:32,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:32,115 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:47:32,116 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:47:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:32,185 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:47:32,185 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:47:32,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,231 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:47:32,231 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:47:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,398 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:47:32,399 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:47:32,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,475 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:47:32,475 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:47:32,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,515 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:47:32,515 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:47:32,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,681 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:47:32,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:47:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-11-26 00:47:32,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,812 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:47:32,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:47:32,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:33,042 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-11-26 00:47:33,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-11-26 00:47:33,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:33,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:33,175 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-11-26 00:47:33,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 235 [2022-11-26 00:47:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:33,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:33,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:33,233 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-26 00:47:33,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 228 treesize of output 214 [2022-11-26 00:47:33,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:33,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:33,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:33,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:33,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:33,621 INFO L321 Elim1Store]: treesize reduction 297, result has 11.3 percent of original size [2022-11-26 00:47:33,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 299 treesize of output 289 [2022-11-26 00:47:33,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:33,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:33,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:33,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:33,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:33,682 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 2 case distinctions, treesize of input 268 treesize of output 246 [2022-11-26 00:47:33,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:33,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:33,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:33,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:33,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:33,817 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-11-26 00:47:33,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 291 treesize of output 266 [2022-11-26 00:47:35,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:47:35,399 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:47:35,571 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 [2022-11-26 00:47:35,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:47:35,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:47:35,683 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 [2022-11-26 00:47:35,694 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 [2022-11-26 00:47:35,705 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 23 treesize of output 1 [2022-11-26 00:47:35,752 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 [2022-11-26 00:47:35,784 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:47:35,784 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 31 treesize of output 21 [2022-11-26 00:47:35,818 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:47:35,819 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 31 treesize of output 21 [2022-11-26 00:47:35,918 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:47:35,918 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 29 treesize of output 40 [2022-11-26 00:47:35,973 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:47:35,973 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 25 treesize of output 23 [2022-11-26 00:47:36,035 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:47:36,035 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 29 treesize of output 40 [2022-11-26 00:47:36,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,118 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 43 treesize of output 23 [2022-11-26 00:47:36,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:36,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:36,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:36,223 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:47:36,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:47:36,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:36,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:36,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:36,317 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:47:36,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:47:39,063 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:47:39,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:47:39,191 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 [2022-11-26 00:47:39,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:39,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:47:39,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:39,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:47:39,279 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 [2022-11-26 00:47:39,292 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 [2022-11-26 00:47:39,304 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 [2022-11-26 00:47:39,350 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:47:39,350 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 31 treesize of output 21 [2022-11-26 00:47:39,381 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:47:39,381 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 31 treesize of output 21 [2022-11-26 00:47:39,398 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 13 treesize of output 9 [2022-11-26 00:47:39,478 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:47:39,479 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 29 treesize of output 40 [2022-11-26 00:47:39,539 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:47:39,539 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 25 treesize of output 23 [2022-11-26 00:47:39,588 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:47:39,588 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 29 treesize of output 40 [2022-11-26 00:47:39,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:39,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:39,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:39,812 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:47:39,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:47:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:39,844 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 43 treesize of output 23 [2022-11-26 00:47:39,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:39,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:39,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:39,929 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:47:39,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:47:42,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:47:42,111 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:47:42,269 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-11-26 00:47:42,276 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:47:55,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21632#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~1#1.offset|) (= (select |#valid| |~#list~0.base|) 1) (or (not (= |ULTIMATE.start_main_~cursor~1#1.offset| 0)) (not (= |ULTIMATE.start_main_~cursor~1#1.base| 0))) (or (not (<= (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) 4 |ULTIMATE.start_main_~cursor~1#1.offset|) (select |#length| |ULTIMATE.start_main_~cursor~1#1.base|))) (not (<= 0 (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~1#1.offset|)))) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~cursor~1#1.base| (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|))) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (<= |#NULL.base| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0))' at error location [2022-11-26 00:47:55,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:55,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:47:55,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 22 [2022-11-26 00:47:55,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20663817] [2022-11-26 00:47:55,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:55,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:47:55,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:47:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2977, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:47:55,657 INFO L87 Difference]: Start difference. First operand 299 states and 380 transitions. Second operand has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:48:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:06,129 INFO L93 Difference]: Finished difference Result 604 states and 729 transitions. [2022-11-26 00:48:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:48:06,130 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-11-26 00:48:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:06,132 INFO L225 Difference]: With dead ends: 604 [2022-11-26 00:48:06,132 INFO L226 Difference]: Without dead ends: 604 [2022-11-26 00:48:06,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=658, Invalid=5662, Unknown=0, NotChecked=0, Total=6320 [2022-11-26 00:48:06,135 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 1479 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:06,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 1316 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1533 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-26 00:48:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-11-26 00:48:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 336. [2022-11-26 00:48:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 274 states have (on average 1.5437956204379562) internal successors, (423), 318 states have internal predecessors, (423), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-26 00:48:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 447 transitions. [2022-11-26 00:48:06,156 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 447 transitions. Word has length 36 [2022-11-26 00:48:06,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:06,158 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 447 transitions. [2022-11-26 00:48:06,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:48:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 447 transitions. [2022-11-26 00:48:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-26 00:48:06,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:06,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:06,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:06,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:06,366 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:48:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:06,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1916425393, now seen corresponding path program 1 times [2022-11-26 00:48:06,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:06,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677686636] [2022-11-26 00:48:06,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:06,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:08,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:08,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677686636] [2022-11-26 00:48:08,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677686636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:08,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494120260] [2022-11-26 00:48:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:08,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:08,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:08,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:48:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:08,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-26 00:48:08,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:08,795 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 15 treesize of output 11 [2022-11-26 00:48:09,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:09,157 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 47 [2022-11-26 00:48:09,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:09,168 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 25 treesize of output 25 [2022-11-26 00:48:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:09,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:48:09,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494120260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:09,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:48:09,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 22 [2022-11-26 00:48:09,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501644080] [2022-11-26 00:48:09,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:09,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:48:09,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:09,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:48:09,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:48:09,234 INFO L87 Difference]: Start difference. First operand 336 states and 447 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:48:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:10,191 INFO L93 Difference]: Finished difference Result 491 states and 643 transitions. [2022-11-26 00:48:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:48:10,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-11-26 00:48:10,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:10,194 INFO L225 Difference]: With dead ends: 491 [2022-11-26 00:48:10,194 INFO L226 Difference]: Without dead ends: 491 [2022-11-26 00:48:10,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:48:10,195 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 756 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:10,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [756 Valid, 570 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:48:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-26 00:48:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 403. [2022-11-26 00:48:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 335 states have (on average 1.5522388059701493) internal successors, (520), 381 states have internal predecessors, (520), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-26 00:48:10,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 552 transitions. [2022-11-26 00:48:10,205 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 552 transitions. Word has length 36 [2022-11-26 00:48:10,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:10,205 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 552 transitions. [2022-11-26 00:48:10,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:48:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 552 transitions. [2022-11-26 00:48:10,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:48:10,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:10,206 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:10,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:10,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:10,407 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:48:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:10,407 INFO L85 PathProgramCache]: Analyzing trace with hash -933579407, now seen corresponding path program 1 times [2022-11-26 00:48:10,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:10,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721842308] [2022-11-26 00:48:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:10,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:48:10,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:10,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721842308] [2022-11-26 00:48:10,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721842308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:10,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:48:10,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:48:10,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960347158] [2022-11-26 00:48:10,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:10,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:48:10,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:48:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:48:10,550 INFO L87 Difference]: Start difference. First operand 403 states and 552 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:48:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:10,682 INFO L93 Difference]: Finished difference Result 571 states and 759 transitions. [2022-11-26 00:48:10,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:48:10,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-11-26 00:48:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:10,685 INFO L225 Difference]: With dead ends: 571 [2022-11-26 00:48:10,685 INFO L226 Difference]: Without dead ends: 571 [2022-11-26 00:48:10,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:48:10,686 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 332 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:10,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 212 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:48:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-26 00:48:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 402. [2022-11-26 00:48:10,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 335 states have (on average 1.5343283582089553) internal successors, (514), 380 states have internal predecessors, (514), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-26 00:48:10,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 546 transitions. [2022-11-26 00:48:10,703 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 546 transitions. Word has length 38 [2022-11-26 00:48:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:10,703 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 546 transitions. [2022-11-26 00:48:10,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:48:10,703 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 546 transitions. [2022-11-26 00:48:10,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:48:10,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:10,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:10,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-26 00:48:10,705 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:48:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:10,705 INFO L85 PathProgramCache]: Analyzing trace with hash -857718950, now seen corresponding path program 1 times [2022-11-26 00:48:10,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:10,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264543310] [2022-11-26 00:48:10,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:10,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:12,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:12,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264543310] [2022-11-26 00:48:12,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264543310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:12,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220609753] [2022-11-26 00:48:12,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:12,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:12,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:12,590 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:12,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:48:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:12,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-26 00:48:12,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:13,071 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:13,072 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 11 treesize of output 11 [2022-11-26 00:48:13,436 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 16 treesize of output 18 [2022-11-26 00:48:13,534 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 16 treesize of output 18 [2022-11-26 00:48:13,619 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 16 treesize of output 18 [2022-11-26 00:48:13,800 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2022-11-26 00:48:13,800 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 1 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:48:14,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:14,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:14,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:14,017 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 32 [2022-11-26 00:48:14,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:14,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:14,438 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 40 [2022-11-26 00:48:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:14,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:15,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220609753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:15,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1747057093] [2022-11-26 00:48:15,703 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:48:15,704 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:48:15,704 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:48:15,704 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:48:15,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:48:15,906 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-11-26 00:48:15,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 214 treesize of output 216 [2022-11-26 00:48:16,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:16,174 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:48:16,174 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:48:16,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,217 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:48:16,217 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:48:16,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:16,285 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:48:16,286 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:48:16,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,433 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:48:16,434 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:48:16,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,512 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:48:16,512 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:48:16,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,614 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:48:16,614 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:48:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,762 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:48:16,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:48:16,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,837 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:48:16,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:48:16,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-11-26 00:48:16,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:16,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:17,094 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-11-26 00:48:17,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-11-26 00:48:17,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:17,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:17,206 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-11-26 00:48:17,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 235 [2022-11-26 00:48:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:17,255 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-26 00:48:17,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 228 treesize of output 214 [2022-11-26 00:48:17,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:17,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:17,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:17,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:17,730 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-11-26 00:48:17,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 703 treesize of output 638 [2022-11-26 00:48:17,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:17,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:17,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:17,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:17,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:17,879 INFO L321 Elim1Store]: treesize reduction 297, result has 11.3 percent of original size [2022-11-26 00:48:17,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 679 treesize of output 649 [2022-11-26 00:48:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:17,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:17,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:17,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:17,943 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 2 case distinctions, treesize of input 640 treesize of output 586 [2022-11-26 00:48:19,544 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:48:19,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:48:19,695 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 [2022-11-26 00:48:19,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:19,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:48:19,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:19,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:48:19,801 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 [2022-11-26 00:48:19,819 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 [2022-11-26 00:48:19,834 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 [2022-11-26 00:48:19,888 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:48:19,889 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 31 treesize of output 21 [2022-11-26 00:48:19,929 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:48:19,929 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 31 treesize of output 21 [2022-11-26 00:48:19,942 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 [2022-11-26 00:48:20,014 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:48:20,015 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 29 treesize of output 40 [2022-11-26 00:48:20,070 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:48:20,070 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 29 treesize of output 40 [2022-11-26 00:48:20,124 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:48:20,124 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 25 treesize of output 23 [2022-11-26 00:48:20,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:20,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:20,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:20,291 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:48:20,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:48:20,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:20,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:20,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:20,386 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:48:20,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:48:20,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:20,417 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 43 treesize of output 23 [2022-11-26 00:48:22,782 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:48:22,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:48:22,906 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 [2022-11-26 00:48:22,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:22,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:48:22,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:22,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:48:22,984 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 [2022-11-26 00:48:22,996 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 [2022-11-26 00:48:23,009 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 [2022-11-26 00:48:23,055 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:48:23,055 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 31 treesize of output 21 [2022-11-26 00:48:23,090 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:48:23,090 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 31 treesize of output 21 [2022-11-26 00:48:23,113 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 [2022-11-26 00:48:23,187 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:48:23,187 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 29 treesize of output 40 [2022-11-26 00:48:23,243 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:48:23,243 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 25 treesize of output 23 [2022-11-26 00:48:23,295 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:48:23,295 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 29 treesize of output 40 [2022-11-26 00:48:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:23,386 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 43 treesize of output 23 [2022-11-26 00:48:23,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:23,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:23,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:23,469 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:48:23,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:48:23,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:23,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:23,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:23,584 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:48:23,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:48:25,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:48:25,419 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:48:25,567 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-11-26 00:48:25,573 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:48:36,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24899#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~1#1.offset|) (= (select |#valid| |~#list~0.base|) 1) (not (= |ULTIMATE.start_main_~cursor~1#1.base| 0)) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~cursor~1#1.offset| 0) (= |ULTIMATE.start_main_~cursor~1#1.base| (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|))) (= |ULTIMATE.start_main_~next~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~cursor~1#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~1#1.offset|))) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (<= (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) 4 |ULTIMATE.start_main_~cursor~1#1.offset|) (select |#length| |ULTIMATE.start_main_~cursor~1#1.base|)) (<= |#NULL.base| 0) (= |ULTIMATE.start_main_~next~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~cursor~1#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~1#1.offset|))) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (= (select |#valid| |ULTIMATE.start_main_~cursor~1#1.base|) 1) (not (< |ULTIMATE.start_main_~cursor~1#1.base| |#StackHeapBarrier|)) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0))' at error location [2022-11-26 00:48:36,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:48:36,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:48:36,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2022-11-26 00:48:36,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990874824] [2022-11-26 00:48:36,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:48:36,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:48:36,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:36,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:48:36,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2976, Unknown=1, NotChecked=0, Total=3192 [2022-11-26 00:48:36,511 INFO L87 Difference]: Start difference. First operand 402 states and 546 transitions. Second operand has 22 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:48:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:42,553 INFO L93 Difference]: Finished difference Result 677 states and 851 transitions. [2022-11-26 00:48:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:48:42,553 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-11-26 00:48:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:42,556 INFO L225 Difference]: With dead ends: 677 [2022-11-26 00:48:42,556 INFO L226 Difference]: Without dead ends: 677 [2022-11-26 00:48:42,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=579, Invalid=5582, Unknown=1, NotChecked=0, Total=6162 [2022-11-26 00:48:42,558 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 1268 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:42,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 1301 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-26 00:48:42,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-11-26 00:48:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 438. [2022-11-26 00:48:42,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 368 states have (on average 1.559782608695652) internal successors, (574), 414 states have internal predecessors, (574), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 00:48:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 610 transitions. [2022-11-26 00:48:42,570 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 610 transitions. Word has length 38 [2022-11-26 00:48:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:42,570 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 610 transitions. [2022-11-26 00:48:42,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.6) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:48:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 610 transitions. [2022-11-26 00:48:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 00:48:42,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:42,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:42,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:42,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-26 00:48:42,777 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:48:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:42,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1123809668, now seen corresponding path program 1 times [2022-11-26 00:48:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:42,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157872535] [2022-11-26 00:48:42,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:42,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:48:45,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:45,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157872535] [2022-11-26 00:48:45,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157872535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:45,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733985435] [2022-11-26 00:48:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:45,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:45,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:45,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:48:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:45,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-26 00:48:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:45,750 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 6 treesize of output 5 [2022-11-26 00:48:45,755 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 15 treesize of output 11 [2022-11-26 00:48:46,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:46,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:46,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:46,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:46,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 136 [2022-11-26 00:48:46,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:46,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:46,327 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 86 [2022-11-26 00:48:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:46,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:47,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:47,601 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 284 treesize of output 282 [2022-11-26 00:48:47,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:47,613 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 319 treesize of output 281 [2022-11-26 00:48:47,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:47,641 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:47,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 294 [2022-11-26 00:48:47,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:47,808 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 9 treesize of output 3 [2022-11-26 00:48:48,089 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 8 treesize of output 4 [2022-11-26 00:48:48,100 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 15 treesize of output 4 [2022-11-26 00:48:48,109 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 8 treesize of output 4 [2022-11-26 00:48:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:48:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733985435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:48:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760305890] [2022-11-26 00:48:48,443 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-26 00:48:48,443 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:48:48,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:48:48,444 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:48:48,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:48:48,596 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-11-26 00:48:48,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 214 treesize of output 216 [2022-11-26 00:48:48,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:48,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:48,900 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:48:48,901 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:48:48,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:48,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:48,968 INFO L321 Elim1Store]: treesize reduction 127, result has 11.8 percent of original size [2022-11-26 00:48:48,968 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 5 case distinctions, treesize of input 253 treesize of output 237 [2022-11-26 00:48:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,010 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:48:49,011 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:48:49,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,166 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:48:49,166 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:48:49,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,240 INFO L321 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-11-26 00:48:49,241 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 5 case distinctions, treesize of input 250 treesize of output 245 [2022-11-26 00:48:49,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,293 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-26 00:48:49,293 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 1 case distinctions, treesize of input 247 treesize of output 222 [2022-11-26 00:48:49,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,452 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:48:49,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:48:49,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 231 [2022-11-26 00:48:49,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,551 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-26 00:48:49,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 265 treesize of output 248 [2022-11-26 00:48:49,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:49,782 INFO L321 Elim1Store]: treesize reduction 180, result has 21.4 percent of original size [2022-11-26 00:48:49,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 257 treesize of output 265 [2022-11-26 00:48:49,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,834 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-26 00:48:49,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 228 treesize of output 214 [2022-11-26 00:48:49,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:49,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:49,941 INFO L321 Elim1Store]: treesize reduction 190, result has 17.0 percent of original size [2022-11-26 00:48:49,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 235 [2022-11-26 00:48:50,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:50,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:50,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:50,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:50,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:50,432 INFO L321 Elim1Store]: treesize reduction 297, result has 11.3 percent of original size [2022-11-26 00:48:50,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 703 treesize of output 673 [2022-11-26 00:48:50,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:50,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:50,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:50,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:50,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:50,489 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 2 case distinctions, treesize of input 664 treesize of output 610 [2022-11-26 00:48:50,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:50,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:50,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:50,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:50,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:50,609 INFO L321 Elim1Store]: treesize reduction 312, result has 6.9 percent of original size [2022-11-26 00:48:50,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 687 treesize of output 622 [2022-11-26 00:48:51,349 INFO L321 Elim1Store]: treesize reduction 107, result has 9.3 percent of original size [2022-11-26 00:48:51,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 639 treesize of output 538 [2022-11-26 00:48:52,039 INFO L321 Elim1Store]: treesize reduction 107, result has 9.3 percent of original size [2022-11-26 00:48:52,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 639 treesize of output 538 [2022-11-26 00:48:52,753 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:48:52,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:48:52,873 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:48:52,874 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:48:52,886 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 [2022-11-26 00:48:52,919 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:48:52,919 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:48:52,968 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 [2022-11-26 00:48:52,986 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 [2022-11-26 00:48:52,996 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 [2022-11-26 00:48:53,046 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:48:53,046 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 31 treesize of output 21 [2022-11-26 00:48:53,060 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 [2022-11-26 00:48:53,094 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:48:53,094 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 31 treesize of output 21 [2022-11-26 00:48:53,171 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:48:53,171 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 29 treesize of output 40 [2022-11-26 00:48:53,228 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:48:53,228 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 29 treesize of output 40 [2022-11-26 00:48:53,289 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:48:53,290 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 25 treesize of output 23 [2022-11-26 00:48:53,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:53,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:53,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:53,454 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:48:53,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:48:53,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:53,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:53,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:53,561 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:48:53,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:48:53,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:53,591 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 43 treesize of output 23 [2022-11-26 00:48:55,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:48:55,258 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:48:55,343 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 23 treesize of output 1 [2022-11-26 00:48:55,376 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:48:55,376 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:48:55,411 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-26 00:48:55,411 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-26 00:48:55,447 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 [2022-11-26 00:48:55,458 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 [2022-11-26 00:48:55,474 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 [2022-11-26 00:48:55,498 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 [2022-11-26 00:48:55,532 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:48:55,532 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 31 treesize of output 21 [2022-11-26 00:48:55,566 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:48:55,566 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 31 treesize of output 21 [2022-11-26 00:48:55,652 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-26 00:48:55,652 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 25 treesize of output 23 [2022-11-26 00:48:55,700 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:48:55,701 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 29 treesize of output 40 [2022-11-26 00:48:55,759 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-26 00:48:55,759 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 29 treesize of output 40 [2022-11-26 00:48:55,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:55,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:55,943 INFO L321 Elim1Store]: treesize reduction 107, result has 35.5 percent of original size [2022-11-26 00:48:55,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 96 [2022-11-26 00:48:55,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:55,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:55,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:56,047 INFO L321 Elim1Store]: treesize reduction 136, result has 18.1 percent of original size [2022-11-26 00:48:56,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 67 [2022-11-26 00:48:56,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:56,076 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 43 treesize of output 23 [2022-11-26 00:48:56,644 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:48:56,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:48:56,827 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 17 for LOIs [2022-11-26 00:48:56,834 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:49:08,897 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26350#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (<= |#NULL.base| 0) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| 0) (or (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_#t~ret32#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret32#1|)) (<= 0 |~#list~0.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |~#list~0.base|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|)) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (not (< |ULTIMATE.start_is_empty_~list#1.base| |#StackHeapBarrier|)) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret32#1|) (<= |~#list~0.offset| 0))' at error location [2022-11-26 00:49:08,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:49:08,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:49:08,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 36 [2022-11-26 00:49:08,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093207251] [2022-11-26 00:49:08,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:49:08,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 00:49:08,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 00:49:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=3724, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 00:49:08,901 INFO L87 Difference]: Start difference. First operand 438 states and 610 transitions. Second operand has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:49:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:29,137 INFO L93 Difference]: Finished difference Result 2133 states and 2761 transitions. [2022-11-26 00:49:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-26 00:49:29,137 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-11-26 00:49:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:29,145 INFO L225 Difference]: With dead ends: 2133 [2022-11-26 00:49:29,146 INFO L226 Difference]: Without dead ends: 2125 [2022-11-26 00:49:29,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6016 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=2347, Invalid=16559, Unknown=0, NotChecked=0, Total=18906 [2022-11-26 00:49:29,150 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 5759 mSDsluCounter, 4962 mSDsCounter, 0 mSdLazyCounter, 3864 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5759 SdHoareTripleChecker+Valid, 5134 SdHoareTripleChecker+Invalid, 4492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 3864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:29,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5759 Valid, 5134 Invalid, 4492 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [628 Valid, 3864 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-26 00:49:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2022-11-26 00:49:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 426. [2022-11-26 00:49:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 356 states have (on average 1.547752808988764) internal successors, (551), 402 states have internal predecessors, (551), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 00:49:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 587 transitions. [2022-11-26 00:49:29,179 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 587 transitions. Word has length 39 [2022-11-26 00:49:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:29,179 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 587 transitions. [2022-11-26 00:49:29,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.75) internal successors, (99), 36 states have internal predecessors, (99), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:49:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 587 transitions. [2022-11-26 00:49:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:49:29,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:29,180 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:49:29,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-26 00:49:29,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-26 00:49:29,387 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:49:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash 478728114, now seen corresponding path program 1 times [2022-11-26 00:49:29,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:29,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352538330] [2022-11-26 00:49:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:29,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:49:29,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:29,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352538330] [2022-11-26 00:49:29,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352538330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:49:29,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:49:29,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:49:29,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96167165] [2022-11-26 00:49:29,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:49:29,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:49:29,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:29,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:49:29,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:49:29,656 INFO L87 Difference]: Start difference. First operand 426 states and 587 transitions. Second operand has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:49:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:30,087 INFO L93 Difference]: Finished difference Result 518 states and 696 transitions. [2022-11-26 00:49:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:49:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-11-26 00:49:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:30,090 INFO L225 Difference]: With dead ends: 518 [2022-11-26 00:49:30,090 INFO L226 Difference]: Without dead ends: 518 [2022-11-26 00:49:30,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:49:30,091 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 353 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:30,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 237 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:49:30,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-11-26 00:49:30,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 423. [2022-11-26 00:49:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 356 states have (on average 1.4887640449438202) internal successors, (530), 399 states have internal predecessors, (530), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 00:49:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 566 transitions. [2022-11-26 00:49:30,102 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 566 transitions. Word has length 40 [2022-11-26 00:49:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:30,103 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 566 transitions. [2022-11-26 00:49:30,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.833333333333333) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:49:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 566 transitions. [2022-11-26 00:49:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:49:30,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:30,104 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:49:30,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-26 00:49:30,104 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:49:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:30,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2114836433, now seen corresponding path program 1 times [2022-11-26 00:49:30,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:30,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37840368] [2022-11-26 00:49:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:30,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:49:30,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:30,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37840368] [2022-11-26 00:49:30,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37840368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:49:30,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:49:30,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:49:30,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858629823] [2022-11-26 00:49:30,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:49:30,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:49:30,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:30,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:49:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:49:30,220 INFO L87 Difference]: Start difference. First operand 423 states and 566 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:49:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:30,579 INFO L93 Difference]: Finished difference Result 522 states and 690 transitions. [2022-11-26 00:49:30,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:49:30,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-26 00:49:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:30,582 INFO L225 Difference]: With dead ends: 522 [2022-11-26 00:49:30,582 INFO L226 Difference]: Without dead ends: 522 [2022-11-26 00:49:30,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:49:30,582 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 112 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:30,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 306 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:49:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-11-26 00:49:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 424. [2022-11-26 00:49:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 357 states have (on average 1.4873949579831933) internal successors, (531), 400 states have internal predecessors, (531), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 00:49:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 567 transitions. [2022-11-26 00:49:30,594 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 567 transitions. Word has length 40 [2022-11-26 00:49:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:30,594 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 567 transitions. [2022-11-26 00:49:30,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:49:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 567 transitions. [2022-11-26 00:49:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:49:30,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:30,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:49:30,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-26 00:49:30,596 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:49:30,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:30,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2114836432, now seen corresponding path program 1 times [2022-11-26 00:49:30,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:30,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336428643] [2022-11-26 00:49:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:30,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:49:30,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:30,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336428643] [2022-11-26 00:49:30,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336428643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:49:30,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:49:30,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:49:30,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438798209] [2022-11-26 00:49:30,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:49:30,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:49:30,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:30,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:49:30,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:49:30,792 INFO L87 Difference]: Start difference. First operand 424 states and 567 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:49:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:31,121 INFO L93 Difference]: Finished difference Result 420 states and 555 transitions. [2022-11-26 00:49:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:49:31,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-26 00:49:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:31,124 INFO L225 Difference]: With dead ends: 420 [2022-11-26 00:49:31,124 INFO L226 Difference]: Without dead ends: 420 [2022-11-26 00:49:31,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:49:31,125 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 115 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:31,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 278 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:49:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-26 00:49:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 413. [2022-11-26 00:49:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 350 states have (on average 1.4485714285714286) internal successors, (507), 389 states have internal predecessors, (507), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 00:49:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 543 transitions. [2022-11-26 00:49:31,136 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 543 transitions. Word has length 40 [2022-11-26 00:49:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:31,136 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 543 transitions. [2022-11-26 00:49:31,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:49:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 543 transitions. [2022-11-26 00:49:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:49:31,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:31,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:49:31,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-26 00:49:31,141 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-26 00:49:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1544482075, now seen corresponding path program 1 times [2022-11-26 00:49:31,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:31,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837851878] [2022-11-26 00:49:31,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:31,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:49:35,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:35,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837851878] [2022-11-26 00:49:35,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837851878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:35,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583830516] [2022-11-26 00:49:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:35,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:35,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:35,667 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:35,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfd09c65-ae6b-47d3-8dc9-6fbbbee926f0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:49:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:35,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-26 00:49:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:36,323 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:49:36,323 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 11 treesize of output 11 [2022-11-26 00:49:37,039 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 16 treesize of output 18 [2022-11-26 00:49:37,052 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 25 treesize of output 24 [2022-11-26 00:49:37,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:37,654 INFO L321 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-11-26 00:49:37,654 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 2 case distinctions, treesize of input 73 treesize of output 94 [2022-11-26 00:49:37,664 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 25 treesize of output 24 [2022-11-26 00:49:37,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:37,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:37,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:37,991 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 0 case distinctions, treesize of input 109 treesize of output 98 [2022-11-26 00:49:38,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:38,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:38,005 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 0 case distinctions, treesize of input 109 treesize of output 114 [2022-11-26 00:49:38,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:38,367 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2022-11-26 00:49:38,367 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 1 case distinctions, treesize of input 107 treesize of output 107 [2022-11-26 00:49:38,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:38,392 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2022-11-26 00:49:38,392 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 1 case distinctions, treesize of input 107 treesize of output 123 [2022-11-26 00:49:39,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:39,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:39,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:39,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:39,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:39,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:39,036 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-26 00:49:39,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 95 treesize of output 78 [2022-11-26 00:49:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:39,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:39,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 138 [2022-11-26 00:49:40,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:41,843 INFO L321 Elim1Store]: treesize reduction 80, result has 91.2 percent of original size [2022-11-26 00:49:41,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 483 treesize of output 1179 [2022-11-26 00:49:41,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:41,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:45,756 INFO L321 Elim1Store]: treesize reduction 1597, result has 38.1 percent of original size [2022-11-26 00:49:45,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 3 disjoint index pairs (out of 210 index pairs), introduced 24 new quantified variables, introduced 206 case distinctions, treesize of input 1179 treesize of output 1582