./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/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_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/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_111ea5a2-b5d2-4336-a21a-98e281de76e0/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 bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd --- 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 00:06:20,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:06:20,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:06:21,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:06:21,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:06:21,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:06:21,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:06:21,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:06:21,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:06:21,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:06:21,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:06:21,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:06:21,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:06:21,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:06:21,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:06:21,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:06:21,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:06:21,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:06:21,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:06:21,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:06:21,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:06:21,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:06:21,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:06:21,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:06:21,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:06:21,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:06:21,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:06:21,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:06:21,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:06:21,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:06:21,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:06:21,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:06:21,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:06:21,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:06:21,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:06:21,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:06:21,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:06:21,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:06:21,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:06:21,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:06:21,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:06:21,081 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:06:21,127 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:06:21,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:06:21,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:06:21,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:06:21,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:06:21,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:06:21,130 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:06:21,130 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:06:21,130 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:06:21,130 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:06:21,131 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:06:21,132 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:06:21,132 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:06:21,132 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:06:21,132 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:06:21,132 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:06:21,133 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:06:21,133 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:06:21,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:06:21,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:06:21,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:06:21,134 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:06:21,135 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:06:21,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:06:21,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:06:21,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:06:21,136 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:06:21,136 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:06:21,136 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:06:21,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:06:21,137 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:06:21,137 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:06:21,137 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:06:21,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:06:21,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:06:21,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:06:21,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:06:21,138 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:06:21,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:06:21,139 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:06:21,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:06:21,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:06:21,139 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_111ea5a2-b5d2-4336-a21a-98e281de76e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd [2022-11-26 00:06:21,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:06:21,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:06:21,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:06:21,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:06:21,498 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:06:21,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2022-11-26 00:06:24,507 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:06:24,740 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:06:24,741 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2022-11-26 00:06:24,757 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/data/acac1c5f9/35f2c0671d28410db8a840eace2e6d3a/FLAG7947c6488 [2022-11-26 00:06:24,779 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/data/acac1c5f9/35f2c0671d28410db8a840eace2e6d3a [2022-11-26 00:06:24,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:06:24,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:06:24,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:06:24,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:06:24,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:06:24,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:06:24" (1/1) ... [2022-11-26 00:06:24,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb31860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:24, skipping insertion in model container [2022-11-26 00:06:24,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:06:24" (1/1) ... [2022-11-26 00:06:24,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:06:24,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:06:25,284 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2022-11-26 00:06:25,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:06:25,300 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:06:25,407 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2022-11-26 00:06:25,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:06:25,462 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:06:25,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25 WrapperNode [2022-11-26 00:06:25,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:06:25,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:06:25,465 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:06:25,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:06:25,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,535 INFO L138 Inliner]: procedures = 126, calls = 25, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2022-11-26 00:06:25,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:06:25,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:06:25,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:06:25,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:06:25,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,583 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:06:25,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:06:25,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:06:25,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:06:25,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (1/1) ... [2022-11-26 00:06:25,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:06:25,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:25,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:06:25,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:06:25,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:06:25,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:06:25,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:06:25,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:06:25,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:06:25,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:06:25,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:06:25,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:06:25,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:06:25,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:06:25,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:06:25,862 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:06:25,880 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:06:26,165 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:06:26,209 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:06:26,209 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:06:26,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:06:26 BoogieIcfgContainer [2022-11-26 00:06:26,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:06:26,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:06:26,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:06:26,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:06:26,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:06:24" (1/3) ... [2022-11-26 00:06:26,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e92a689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:06:26, skipping insertion in model container [2022-11-26 00:06:26,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:06:25" (2/3) ... [2022-11-26 00:06:26,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e92a689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:06:26, skipping insertion in model container [2022-11-26 00:06:26,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:06:26" (3/3) ... [2022-11-26 00:06:26,222 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2022-11-26 00:06:26,242 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:06:26,243 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-11-26 00:06:26,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:06:26,292 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;@45e9f183, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:06:26,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-26 00:06:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 40 states have internal predecessors, (44), 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 00:06:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:06:26,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:26,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:06:26,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:06:26,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash 3883661, now seen corresponding path program 1 times [2022-11-26 00:06:26,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:26,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433216037] [2022-11-26 00:06:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:26,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:26,547 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 00:06:26,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:26,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433216037] [2022-11-26 00:06:26,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433216037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:26,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:26,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:06:26,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326424417] [2022-11-26 00:06:26,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:26,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:06:26,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:26,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:06:26,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:26,590 INFO L87 Difference]: Start difference. First operand has 41 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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 00:06:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:26,642 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-11-26 00:06:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 00:06:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:26,654 INFO L225 Difference]: With dead ends: 53 [2022-11-26 00:06:26,654 INFO L226 Difference]: Without dead ends: 50 [2022-11-26 00:06:26,656 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 00:06:26,659 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:26,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:06:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-26 00:06:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2022-11-26 00:06:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-11-26 00:06:26,696 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 4 [2022-11-26 00:06:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:26,697 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-11-26 00:06:26,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 00:06:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-11-26 00:06:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:06:26,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:26,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:06:26,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:06:26,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:06:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash 3793582, now seen corresponding path program 1 times [2022-11-26 00:06:26,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:26,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460734678] [2022-11-26 00:06:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:26,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:26,793 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 00:06:26,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:26,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460734678] [2022-11-26 00:06:26,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460734678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:26,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:26,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:06:26,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427152558] [2022-11-26 00:06:26,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:26,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:06:26,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:06:26,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:26,798 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:26,873 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-11-26 00:06:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-26 00:06:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:26,875 INFO L225 Difference]: With dead ends: 60 [2022-11-26 00:06:26,875 INFO L226 Difference]: Without dead ends: 60 [2022-11-26 00:06:26,875 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 00:06:26,877 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:26,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:06:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-26 00:06:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2022-11-26 00:06:26,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 37 states have internal predecessors, (39), 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 00:06:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-11-26 00:06:26,884 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 4 [2022-11-26 00:06:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:26,884 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-11-26 00:06:26,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-11-26 00:06:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:06:26,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:26,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:06:26,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:06:26,886 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:06:26,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:26,887 INFO L85 PathProgramCache]: Analyzing trace with hash 3793583, now seen corresponding path program 1 times [2022-11-26 00:06:26,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:26,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756776314] [2022-11-26 00:06:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:26,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:26,993 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 00:06:26,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:26,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756776314] [2022-11-26 00:06:26,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756776314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:26,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:26,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:06:26,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909854281] [2022-11-26 00:06:26,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:26,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:06:26,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:26,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:06:26,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:06:26,998 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:27,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:27,042 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-11-26 00:06:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:06:27,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-26 00:06:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:27,044 INFO L225 Difference]: With dead ends: 36 [2022-11-26 00:06:27,044 INFO L226 Difference]: Without dead ends: 36 [2022-11-26 00:06:27,044 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 00:06:27,046 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:27,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:06:27,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-26 00:06:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-26 00:06:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 35 states have internal predecessors, (37), 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 00:06:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-11-26 00:06:27,052 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 4 [2022-11-26 00:06:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:27,052 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-11-26 00:06:27,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-11-26 00:06:27,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:06:27,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:27,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:06:27,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:06:27,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:06:27,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash -649332982, now seen corresponding path program 1 times [2022-11-26 00:06:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:27,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484640827] [2022-11-26 00:06:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:27,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:27,150 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 00:06:27,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:27,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484640827] [2022-11-26 00:06:27,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484640827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:27,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:27,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:06:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467153751] [2022-11-26 00:06:27,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:27,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:27,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:27,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:27,154 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:27,245 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-11-26 00:06:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:06:27,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:06:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:27,246 INFO L225 Difference]: With dead ends: 60 [2022-11-26 00:06:27,247 INFO L226 Difference]: Without dead ends: 60 [2022-11-26 00:06:27,247 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 00:06:27,248 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:27,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:06:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-26 00:06:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 35. [2022-11-26 00:06:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.894736842105263) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-26 00:06:27,254 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 6 [2022-11-26 00:06:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:27,255 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-26 00:06:27,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-26 00:06:27,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:06:27,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:27,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:06:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:06:27,256 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:06:27,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash -649332981, now seen corresponding path program 1 times [2022-11-26 00:06:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:27,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783508417] [2022-11-26 00:06:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:27,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:27,431 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 00:06:27,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:27,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783508417] [2022-11-26 00:06:27,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783508417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:27,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:06:27,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:06:27,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808979699] [2022-11-26 00:06:27,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:27,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:27,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:27,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:27,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:06:27,434 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:27,496 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-11-26 00:06:27,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:06:27,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:06:27,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:27,500 INFO L225 Difference]: With dead ends: 37 [2022-11-26 00:06:27,500 INFO L226 Difference]: Without dead ends: 37 [2022-11-26 00:06:27,501 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 00:06:27,506 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:27,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:06:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-26 00:06:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2022-11-26 00:06:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 33 states have internal predecessors, (35), 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 00:06:27,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-11-26 00:06:27,520 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 6 [2022-11-26 00:06:27,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:27,521 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-11-26 00:06:27,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-11-26 00:06:27,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:06:27,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:27,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:27,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:06:27,522 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:06:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:27,523 INFO L85 PathProgramCache]: Analyzing trace with hash 255990205, now seen corresponding path program 1 times [2022-11-26 00:06:27,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:27,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495059649] [2022-11-26 00:06:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:27,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:27,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495059649] [2022-11-26 00:06:27,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495059649] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200189181] [2022-11-26 00:06:27,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:27,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:27,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:27,643 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:27,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:06:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:27,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:06:27,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:27,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:27,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200189181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:27,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457360478] [2022-11-26 00:06:27,920 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:06:27,920 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:27,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:27,931 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:27,932 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:28,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:06:28,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:06:28,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:06:28,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:06:28,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:06:28,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:06:28,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,341 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 25 treesize of output 13 [2022-11-26 00:06:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,367 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 25 treesize of output 13 [2022-11-26 00:06:28,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,459 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 41 treesize of output 31 [2022-11-26 00:06:28,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:28,485 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 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-26 00:06:28,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:28,504 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 23 treesize of output 13 [2022-11-26 00:06:28,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:06:28,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:28,889 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:06:28,890 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 2 case distinctions, treesize of input 345 treesize of output 327 [2022-11-26 00:06:28,953 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:28,953 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 339 treesize of output 346 [2022-11-26 00:06:29,032 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:29,033 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 333 treesize of output 340 [2022-11-26 00:06:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:29,623 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:29,624 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 672 treesize of output 673 [2022-11-26 00:06:29,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:29,701 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:29,701 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 666 treesize of output 667 [2022-11-26 00:06:29,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:29,783 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:06:29,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 647 treesize of output 628 [2022-11-26 00:06:30,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:30,413 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:06:30,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-11-26 00:06:30,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:30,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:30,480 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:06:30,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 352 treesize of output 345 [2022-11-26 00:06:30,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:30,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:30,534 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-26 00:06:30,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 424 treesize of output 417 [2022-11-26 00:06:30,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:30,818 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:06:30,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-11-26 00:06:31,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:31,091 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:06:31,096 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 2 case distinctions, treesize of input 345 treesize of output 327 [2022-11-26 00:06:31,147 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:31,147 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 339 treesize of output 346 [2022-11-26 00:06:31,215 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:31,216 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 333 treesize of output 340 [2022-11-26 00:06:31,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:31,883 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:06:31,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1155 treesize of output 1104 [2022-11-26 00:06:31,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:31,989 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:31,989 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 1152 treesize of output 1147 [2022-11-26 00:06:32,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:32,074 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:32,075 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 1140 treesize of output 1135 [2022-11-26 00:06:32,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:32,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:32,859 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:06:32,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 348 treesize of output 341 [2022-11-26 00:06:32,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:32,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:32,908 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:06:32,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 360 treesize of output 353 [2022-11-26 00:06:32,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:32,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:32,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:32,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:32,945 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-26 00:06:32,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 430 treesize of output 415 [2022-11-26 00:06:33,116 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 00:06:33,128 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 00:06:33,134 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:36,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [457360478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:36,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:06:36,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2022-11-26 00:06:36,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405707535] [2022-11-26 00:06:36,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:36,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:06:36,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:36,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:06:36,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:06:36,108 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 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 00:06:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:36,430 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2022-11-26 00:06:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:06:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 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 9 [2022-11-26 00:06:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:36,434 INFO L225 Difference]: With dead ends: 53 [2022-11-26 00:06:36,434 INFO L226 Difference]: Without dead ends: 53 [2022-11-26 00:06:36,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:06:36,435 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:36,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 43 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:06:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-26 00:06:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2022-11-26 00:06:36,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.8) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-26 00:06:36,440 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 9 [2022-11-26 00:06:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:36,440 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-26 00:06:36,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 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 00:06:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-26 00:06:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:06:36,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:36,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:36,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:36,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:36,648 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:06:36,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:36,649 INFO L85 PathProgramCache]: Analyzing trace with hash 255988536, now seen corresponding path program 1 times [2022-11-26 00:06:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:36,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960450307] [2022-11-26 00:06:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:36,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:36,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:36,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:36,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960450307] [2022-11-26 00:06:36,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960450307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:36,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149691342] [2022-11-26 00:06:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:36,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:36,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:36,775 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:36,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:06:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:36,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:06:36,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:36,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:36,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149691342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:36,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1394629231] [2022-11-26 00:06:36,928 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:06:36,928 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:36,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:36,929 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:36,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:36,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:36,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:36,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:06:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:36,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:36,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:36,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:36,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:36,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:06:37,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:06:37,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:06:37,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:06:37,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:06:37,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,104 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 25 treesize of output 13 [2022-11-26 00:06:37,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,121 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 25 treesize of output 13 [2022-11-26 00:06:37,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,167 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 41 treesize of output 31 [2022-11-26 00:06:37,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:37,184 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 23 treesize of output 13 [2022-11-26 00:06:37,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:37,202 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 23 treesize of output 13 [2022-11-26 00:06:37,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:06:37,386 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:37,387 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 339 treesize of output 346 [2022-11-26 00:06:37,458 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:37,459 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 333 treesize of output 340 [2022-11-26 00:06:37,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:37,497 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:06:37,497 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 2 case distinctions, treesize of input 333 treesize of output 315 [2022-11-26 00:06:38,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:38,172 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:06:38,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1155 treesize of output 1104 [2022-11-26 00:06:38,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,273 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:38,274 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 1152 treesize of output 1147 [2022-11-26 00:06:38,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,346 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:38,347 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 1140 treesize of output 1135 [2022-11-26 00:06:38,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:38,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:38,951 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:06:38,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 348 treesize of output 333 [2022-11-26 00:06:38,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:38,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:38,996 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:06:38,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 344 treesize of output 337 [2022-11-26 00:06:39,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:39,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:39,035 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-26 00:06:39,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 404 treesize of output 397 [2022-11-26 00:06:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:39,236 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:06:39,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 405 treesize of output 409 [2022-11-26 00:06:39,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:39,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:39,445 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:06:39,446 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 2 case distinctions, treesize of input 345 treesize of output 327 [2022-11-26 00:06:39,490 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:39,490 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 339 treesize of output 346 [2022-11-26 00:06:39,536 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:39,537 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 333 treesize of output 340 [2022-11-26 00:06:39,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:39,832 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:39,833 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 672 treesize of output 673 [2022-11-26 00:06:39,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:39,896 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:39,898 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 666 treesize of output 667 [2022-11-26 00:06:39,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:39,971 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:06:39,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 647 treesize of output 628 [2022-11-26 00:06:40,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:40,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:40,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:40,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:40,334 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:06:40,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-11-26 00:06:40,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:40,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:40,380 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:06:40,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 352 treesize of output 345 [2022-11-26 00:06:40,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:40,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:40,427 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-26 00:06:40,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 424 treesize of output 417 [2022-11-26 00:06:40,624 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 00:06:40,633 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 00:06:40,636 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:43,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '695#(and (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:43,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:43,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:06:43,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-26 00:06:43,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263350620] [2022-11-26 00:06:43,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:43,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:06:43,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:43,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:06:43,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:06:43,842 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:43,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:43,875 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-11-26 00:06:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:06:43,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:06:43,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:43,876 INFO L225 Difference]: With dead ends: 40 [2022-11-26 00:06:43,876 INFO L226 Difference]: Without dead ends: 40 [2022-11-26 00:06:43,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:06:43,877 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:43,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 76 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:06:43,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-26 00:06:43,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-26 00:06:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.64) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-11-26 00:06:43,881 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 9 [2022-11-26 00:06:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:43,881 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-11-26 00:06:43,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-11-26 00:06:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:06:43,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:43,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-26 00:06:43,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:44,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 00:06:44,088 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:06:44,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:44,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1479394808, now seen corresponding path program 2 times [2022-11-26 00:06:44,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:44,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406277166] [2022-11-26 00:06:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:44,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:06:44,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:44,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406277166] [2022-11-26 00:06:44,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406277166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:44,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916620912] [2022-11-26 00:06:44,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:06:44,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:44,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:44,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:06:44,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:06:44,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:44,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:06:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:44,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:06:44,479 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:06:44,479 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 00:06:44,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,541 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 14 [2022-11-26 00:06:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:06:44,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:44,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916620912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:44,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1471980053] [2022-11-26 00:06:44,682 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:06:44,682 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:44,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:44,683 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:44,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:44,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:06:44,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:06:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:06:44,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:06:44,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:06:44,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,826 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 25 treesize of output 13 [2022-11-26 00:06:44,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:06:44,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,862 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 25 treesize of output 13 [2022-11-26 00:06:44,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:44,901 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 23 treesize of output 13 [2022-11-26 00:06:44,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,920 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 41 treesize of output 31 [2022-11-26 00:06:44,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:44,942 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 23 treesize of output 13 [2022-11-26 00:06:44,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:44,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:45,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:45,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:45,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:45,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:06:45,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:45,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:45,158 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-26 00:06:45,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 344 [2022-11-26 00:06:45,211 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:45,212 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 342 treesize of output 349 [2022-11-26 00:06:45,265 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:45,266 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 336 treesize of output 343 [2022-11-26 00:06:45,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:45,832 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-26 00:06:45,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 871 treesize of output 844 [2022-11-26 00:06:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:45,912 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:45,912 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 872 treesize of output 873 [2022-11-26 00:06:45,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:45,980 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:45,981 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 866 treesize of output 861 [2022-11-26 00:06:46,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:46,645 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:06:46,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-11-26 00:06:46,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:46,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:46,693 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:06:46,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 352 treesize of output 345 [2022-11-26 00:06:46,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:46,740 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:06:46,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 364 treesize of output 357 [2022-11-26 00:06:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:46,951 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:06:46,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-11-26 00:06:47,206 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:47,206 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 346 treesize of output 353 [2022-11-26 00:06:47,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:47,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:47,272 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-26 00:06:47,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 346 treesize of output 338 [2022-11-26 00:06:47,320 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:47,321 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 336 treesize of output 343 [2022-11-26 00:06:47,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:48,001 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-26 00:06:48,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1193 treesize of output 1146 [2022-11-26 00:06:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:48,093 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:48,094 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 1190 treesize of output 1185 [2022-11-26 00:06:48,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:48,177 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:48,178 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 1178 treesize of output 1173 [2022-11-26 00:06:49,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:49,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:49,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:49,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:49,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:49,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:49,114 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:06:49,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 386 treesize of output 371 [2022-11-26 00:06:49,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:49,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:49,154 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:06:49,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 382 treesize of output 375 [2022-11-26 00:06:49,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:49,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:49,195 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-26 00:06:49,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 436 treesize of output 429 [2022-11-26 00:06:49,370 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 00:06:49,377 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 00:06:49,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:06:52,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '872#(and (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:06:52,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:06:52,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:06:52,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-26 00:06:52,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507188475] [2022-11-26 00:06:52,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:52,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:06:52,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:52,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:06:52,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:06:52,803 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 00:06:52,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:52,953 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-11-26 00:06:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:06:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:06:52,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:52,954 INFO L225 Difference]: With dead ends: 52 [2022-11-26 00:06:52,954 INFO L226 Difference]: Without dead ends: 52 [2022-11-26 00:06:52,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:06:52,955 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:52,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 36 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:06:52,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-26 00:06:52,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2022-11-26 00:06:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 39 states have internal predecessors, (42), 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 00:06:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-11-26 00:06:52,958 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 14 [2022-11-26 00:06:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:52,958 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-11-26 00:06:52,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 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 00:06:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-11-26 00:06:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:06:52,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:52,959 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-26 00:06:52,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:53,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:06:53,160 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:06:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:53,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1479394807, now seen corresponding path program 1 times [2022-11-26 00:06:53,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:53,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312901302] [2022-11-26 00:06:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:53,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:06:53,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:53,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312901302] [2022-11-26 00:06:53,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312901302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:53,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630263123] [2022-11-26 00:06:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:53,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:53,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:53,560 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:53,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:06:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:06:53,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:53,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:06:53,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:53,726 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 14 [2022-11-26 00:06:53,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:53,761 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 14 [2022-11-26 00:06:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:06:53,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:58,095 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_node_create_~temp~0#1.base_27| Int)) (or (not (< |v_ULTIMATE.start_node_create_~temp~0#1.base_27| |c_#StackHeapBarrier|)) (forall ((|v_ULTIMATE.start_node_create_~temp~0#1.base_26| Int) (v_ArrVal_303 Int)) (or (forall ((v_ArrVal_304 Int)) (<= (+ |c_ULTIMATE.start_main_~#s~0#1.offset| 4) (select (store (store |c_#length| |v_ULTIMATE.start_node_create_~temp~0#1.base_27| v_ArrVal_303) |v_ULTIMATE.start_node_create_~temp~0#1.base_26| v_ArrVal_304) |c_ULTIMATE.start_main_~#s~0#1.base|))) (not (< |v_ULTIMATE.start_node_create_~temp~0#1.base_26| |c_#StackHeapBarrier|)))))) (<= 0 |c_ULTIMATE.start_main_~#s~0#1.offset|)) is different from false [2022-11-26 00:06:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-26 00:06:58,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630263123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293214107] [2022-11-26 00:06:58,099 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-26 00:06:58,099 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:58,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:58,100 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:58,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:58,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:06:58,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:06:58,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:06:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:06:58,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:06:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,264 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 25 treesize of output 13 [2022-11-26 00:06:58,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:06:58,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,299 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 25 treesize of output 13 [2022-11-26 00:06:58,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:58,334 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 23 treesize of output 13 [2022-11-26 00:06:58,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:58,351 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 23 treesize of output 13 [2022-11-26 00:06:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,368 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 41 treesize of output 31 [2022-11-26 00:06:58,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:06:58,538 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:58,539 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 346 treesize of output 353 [2022-11-26 00:06:58,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:58,572 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:06:58,573 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 2 case distinctions, treesize of input 346 treesize of output 328 [2022-11-26 00:06:58,629 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:06:58,630 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 340 treesize of output 347 [2022-11-26 00:06:58,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:59,024 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:06:59,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 673 treesize of output 654 [2022-11-26 00:06:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:59,101 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:59,101 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 678 treesize of output 679 [2022-11-26 00:06:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:59,183 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:06:59,184 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 672 treesize of output 673 [2022-11-26 00:06:59,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:59,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:59,607 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:06:59,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 348 treesize of output 341 [2022-11-26 00:06:59,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:59,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:59,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:59,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:59,647 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:06:59,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 364 treesize of output 349 [2022-11-26 00:06:59,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:59,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:06:59,685 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:06:59,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 360 treesize of output 353 [2022-11-26 00:06:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:06:59,897 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:06:59,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 415 treesize of output 419 [2022-11-26 00:07:00,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:00,139 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:07:00,140 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 2 case distinctions, treesize of input 352 treesize of output 334 [2022-11-26 00:07:00,186 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:00,186 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 346 treesize of output 353 [2022-11-26 00:07:00,237 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:00,238 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 340 treesize of output 347 [2022-11-26 00:07:00,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:00,569 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:00,570 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 686 treesize of output 687 [2022-11-26 00:07:00,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:00,643 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:00,643 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 680 treesize of output 681 [2022-11-26 00:07:00,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:00,710 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:07:00,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 661 treesize of output 642 [2022-11-26 00:07:01,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:01,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:01,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:01,231 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:07:01,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 380 treesize of output 365 [2022-11-26 00:07:01,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:01,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:01,273 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:07:01,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 376 treesize of output 369 [2022-11-26 00:07:01,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:01,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:01,311 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-26 00:07:01,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 460 treesize of output 453 [2022-11-26 00:07:01,495 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 00:07:01,502 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 00:07:01,505 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:07:04,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1069#(and (not (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|))) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:07:04,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:07:04,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:07:04,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 13 [2022-11-26 00:07:04,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323698009] [2022-11-26 00:07:04,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:07:04,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:07:04,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:04,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:07:04,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=356, Unknown=1, NotChecked=40, Total=506 [2022-11-26 00:07:04,877 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 00:07:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:05,124 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-26 00:07:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:07:05,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:07:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:05,125 INFO L225 Difference]: With dead ends: 46 [2022-11-26 00:07:05,125 INFO L226 Difference]: Without dead ends: 46 [2022-11-26 00:07:05,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=166, Invalid=487, Unknown=1, NotChecked=48, Total=702 [2022-11-26 00:07:05,127 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 150 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:05,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 11 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-26 00:07:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-26 00:07:05,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2022-11-26 00:07:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 35 states have internal predecessors, (37), 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 00:07:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-11-26 00:07:05,130 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 14 [2022-11-26 00:07:05,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:05,130 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-11-26 00:07:05,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 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 00:07:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-11-26 00:07:05,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:07:05,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:05,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:07:05,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:05,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:05,334 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:07:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1383401228, now seen corresponding path program 1 times [2022-11-26 00:07:05,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:05,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888520284] [2022-11-26 00:07:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:05,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:07:05,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:05,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888520284] [2022-11-26 00:07:05,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888520284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:07:05,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:07:05,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:07:05,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444779102] [2022-11-26 00:07:05,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:07:05,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:07:05,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:05,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:07:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:07:05,513 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:05,631 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-11-26 00:07:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:07:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:07:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:05,632 INFO L225 Difference]: With dead ends: 45 [2022-11-26 00:07:05,632 INFO L226 Difference]: Without dead ends: 45 [2022-11-26 00:07:05,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:07:05,633 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:05,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 52 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:07:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-26 00:07:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-11-26 00:07:05,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 36 states have internal predecessors, (39), 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 00:07:05,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-11-26 00:07:05,636 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 15 [2022-11-26 00:07:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:05,637 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-11-26 00:07:05,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-11-26 00:07:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:07:05,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:05,637 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:07:05,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:07:05,638 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:07:05,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:05,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1383401229, now seen corresponding path program 1 times [2022-11-26 00:07:05,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:05,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341886493] [2022-11-26 00:07:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:05,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:05,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:07:05,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:05,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341886493] [2022-11-26 00:07:05,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341886493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:07:05,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:07:05,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:07:05,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043950516] [2022-11-26 00:07:05,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:07:05,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:07:05,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:05,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:07:05,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:07:05,957 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:06,150 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-26 00:07:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:07:06,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:07:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:06,151 INFO L225 Difference]: With dead ends: 46 [2022-11-26 00:07:06,151 INFO L226 Difference]: Without dead ends: 46 [2022-11-26 00:07:06,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:07:06,152 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 134 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:06,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 50 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:07:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-26 00:07:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2022-11-26 00:07:06,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-26 00:07:06,155 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 15 [2022-11-26 00:07:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:06,155 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-26 00:07:06,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-26 00:07:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:07:06,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:06,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:06,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:07:06,156 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:07:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1991243403, now seen corresponding path program 1 times [2022-11-26 00:07:06,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:06,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122846119] [2022-11-26 00:07:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:07:06,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:06,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122846119] [2022-11-26 00:07:06,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122846119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:07:06,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:07:06,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:07:06,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566047140] [2022-11-26 00:07:06,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:07:06,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:07:06,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:06,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:07:06,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:07:06,301 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:06,437 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-11-26 00:07:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:07:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-26 00:07:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:06,443 INFO L225 Difference]: With dead ends: 45 [2022-11-26 00:07:06,443 INFO L226 Difference]: Without dead ends: 45 [2022-11-26 00:07:06,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:07:06,443 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:06,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 58 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:07:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-26 00:07:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-11-26 00:07:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-26 00:07:06,446 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 17 [2022-11-26 00:07:06,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:06,447 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-26 00:07:06,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,447 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-26 00:07:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:07:06,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:06,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:06,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:07:06,448 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:07:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:06,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1599003259, now seen corresponding path program 1 times [2022-11-26 00:07:06,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:06,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268975197] [2022-11-26 00:07:06,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:06,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:07:06,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:06,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268975197] [2022-11-26 00:07:06,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268975197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:07:06,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:07:06,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:07:06,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307287215] [2022-11-26 00:07:06,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:07:06,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:07:06,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:07:06,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:07:06,653 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:06,834 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2022-11-26 00:07:06,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:07:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-26 00:07:06,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:06,836 INFO L225 Difference]: With dead ends: 44 [2022-11-26 00:07:06,836 INFO L226 Difference]: Without dead ends: 44 [2022-11-26 00:07:06,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:07:06,837 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:06,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 40 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:07:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-26 00:07:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-11-26 00:07:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-11-26 00:07:06,840 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 18 [2022-11-26 00:07:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:06,841 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-11-26 00:07:06,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-11-26 00:07:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:07:06,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:06,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-26 00:07:06,842 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:07:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1970506615, now seen corresponding path program 1 times [2022-11-26 00:07:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:06,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300631630] [2022-11-26 00:07:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:07:06,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:06,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300631630] [2022-11-26 00:07:06,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300631630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:07:06,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:07:06,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:07:06,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192892670] [2022-11-26 00:07:06,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:07:06,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:07:06,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:07:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:07:06,921 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:06,990 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-11-26 00:07:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:07:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 00:07:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:06,991 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:07:06,991 INFO L226 Difference]: Without dead ends: 39 [2022-11-26 00:07:06,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:07:06,992 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:06,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 30 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:07:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-26 00:07:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-26 00:07:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-26 00:07:06,996 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 19 [2022-11-26 00:07:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:06,996 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-26 00:07:06,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-26 00:07:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 00:07:06,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:06,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:06,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 00:07:06,998 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:07:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash 956163016, now seen corresponding path program 1 times [2022-11-26 00:07:06,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:06,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281411789] [2022-11-26 00:07:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:06,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:07:07,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:07,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281411789] [2022-11-26 00:07:07,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281411789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:07:07,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031447334] [2022-11-26 00:07:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:07,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:07,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:07,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:07,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:07:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:07,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:07:07,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:07,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:07,461 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 14 [2022-11-26 00:07:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:07:07,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:07:07,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031447334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:07:07,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:07:07,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-26 00:07:07,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102672786] [2022-11-26 00:07:07,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:07:07,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:07:07,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:07:07,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:07:07,471 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:07,556 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2022-11-26 00:07:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:07:07,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-26 00:07:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:07,557 INFO L225 Difference]: With dead ends: 38 [2022-11-26 00:07:07,557 INFO L226 Difference]: Without dead ends: 38 [2022-11-26 00:07:07,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:07:07,558 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:07,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 17 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:07:07,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-26 00:07:07,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-26 00:07:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3) internal successors, (39), 37 states have internal predecessors, (39), 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 00:07:07,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-11-26 00:07:07,561 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 20 [2022-11-26 00:07:07,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:07,562 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-11-26 00:07:07,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:07,562 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-11-26 00:07:07,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:07:07,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:07,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:07,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:07,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:07:07,766 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:07:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash -250310995, now seen corresponding path program 1 times [2022-11-26 00:07:07,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:07,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684849855] [2022-11-26 00:07:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:07,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:07:07,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:07,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684849855] [2022-11-26 00:07:07,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684849855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:07:07,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542435852] [2022-11-26 00:07:07,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:07,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:07,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:07,870 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:07,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:07:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:07:08,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:07:08,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:07:08,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542435852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:08,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176957548] [2022-11-26 00:07:08,115 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-26 00:07:08,115 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:07:08,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:07:08,116 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:07:08,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:07:08,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:07:08,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:07:08,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:07:08,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:07:08,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:07:08,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,254 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 25 treesize of output 13 [2022-11-26 00:07:08,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:07:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,283 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 25 treesize of output 13 [2022-11-26 00:07:08,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:08,320 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 23 treesize of output 13 [2022-11-26 00:07:08,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:08,337 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 23 treesize of output 13 [2022-11-26 00:07:08,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,359 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 41 treesize of output 31 [2022-11-26 00:07:08,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:07:08,523 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:08,523 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 346 treesize of output 353 [2022-11-26 00:07:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:08,552 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:07:08,553 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 2 case distinctions, treesize of input 346 treesize of output 328 [2022-11-26 00:07:08,599 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:08,600 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 340 treesize of output 347 [2022-11-26 00:07:08,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:09,033 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:09,034 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 874 treesize of output 869 [2022-11-26 00:07:09,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:09,120 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:07:09,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 849 treesize of output 818 [2022-11-26 00:07:09,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:09,192 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:09,193 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 850 treesize of output 851 [2022-11-26 00:07:09,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:09,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:09,611 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:07:09,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 386 treesize of output 379 [2022-11-26 00:07:09,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:09,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:09,655 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-26 00:07:09,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 434 treesize of output 427 [2022-11-26 00:07:09,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:09,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:09,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:09,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:09,688 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-26 00:07:09,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 528 treesize of output 513 [2022-11-26 00:07:09,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:09,929 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:07:09,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 513 treesize of output 509 [2022-11-26 00:07:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,176 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:07:10,177 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 2 case distinctions, treesize of input 352 treesize of output 334 [2022-11-26 00:07:10,223 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:10,223 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 346 treesize of output 353 [2022-11-26 00:07:10,274 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:10,274 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 340 treesize of output 347 [2022-11-26 00:07:10,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:10,584 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:07:10,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 673 treesize of output 654 [2022-11-26 00:07:10,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,657 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:10,658 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 678 treesize of output 679 [2022-11-26 00:07:10,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:10,757 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:10,757 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 672 treesize of output 673 [2022-11-26 00:07:11,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:11,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:11,318 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:07:11,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 363 treesize of output 356 [2022-11-26 00:07:11,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:11,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:11,364 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-26 00:07:11,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 399 treesize of output 392 [2022-11-26 00:07:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:11,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:11,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:11,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:11,397 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-26 00:07:11,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 475 treesize of output 460 [2022-11-26 00:07:11,634 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-26 00:07:11,634 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 25 treesize of output 29 [2022-11-26 00:07:11,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:11,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 57 [2022-11-26 00:07:11,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:11,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:07:11,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 50 [2022-11-26 00:07:11,722 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 1 [2022-11-26 00:07:11,885 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:07:11,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-11-26 00:07:11,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:11,959 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 1 [2022-11-26 00:07:11,968 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 11 treesize of output 7 [2022-11-26 00:07:12,235 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:07:12,235 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 30 treesize of output 45 [2022-11-26 00:07:12,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:12,290 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 1 [2022-11-26 00:07:12,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:12,482 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 00:07:12,490 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 00:07:12,495 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:07:16,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1944#(and (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:07:16,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:07:16,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:07:16,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-11-26 00:07:16,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628184979] [2022-11-26 00:07:16,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:07:16,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:07:16,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:16,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:07:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:07:16,571 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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 00:07:16,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:16,618 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2022-11-26 00:07:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:07:16,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-26 00:07:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:16,619 INFO L225 Difference]: With dead ends: 41 [2022-11-26 00:07:16,619 INFO L226 Difference]: Without dead ends: 41 [2022-11-26 00:07:16,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:07:16,620 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:16,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 38 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:07:16,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-26 00:07:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-26 00:07:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 40 states have internal predecessors, (42), 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 00:07:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-26 00:07:16,623 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 22 [2022-11-26 00:07:16,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:16,624 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-26 00:07:16,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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 00:07:16,624 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-26 00:07:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:07:16,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:16,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:16,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:16,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:07:16,831 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:07:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash -250312664, now seen corresponding path program 1 times [2022-11-26 00:07:16,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:16,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447131082] [2022-11-26 00:07:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:16,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:07:16,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:16,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447131082] [2022-11-26 00:07:16,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447131082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:07:16,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758434945] [2022-11-26 00:07:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:16,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:16,920 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:16,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:07:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:07:17,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:07:17,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:17,097 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-26 00:07:17,097 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 12 treesize of output 11 [2022-11-26 00:07:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:07:17,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758434945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:17,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [16194272] [2022-11-26 00:07:17,117 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:07:17,117 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:07:17,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:07:17,118 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:07:17,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:07:17,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:07:17,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:07:17,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:07:17,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:07:17,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:07:17,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,250 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 25 treesize of output 13 [2022-11-26 00:07:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:07:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,280 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 25 treesize of output 13 [2022-11-26 00:07:17,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:17,316 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 23 treesize of output 13 [2022-11-26 00:07:17,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:17,328 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 23 treesize of output 13 [2022-11-26 00:07:17,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,350 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 41 treesize of output 31 [2022-11-26 00:07:17,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:07:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:17,528 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-26 00:07:17,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 344 [2022-11-26 00:07:17,582 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:17,582 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 342 treesize of output 349 [2022-11-26 00:07:17,633 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:17,634 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 336 treesize of output 343 [2022-11-26 00:07:18,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:18,174 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-26 00:07:18,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1193 treesize of output 1146 [2022-11-26 00:07:18,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:18,254 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:18,255 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 1190 treesize of output 1185 [2022-11-26 00:07:18,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:18,318 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:18,318 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 1178 treesize of output 1173 [2022-11-26 00:07:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:18,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:18,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:18,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:18,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:18,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:18,933 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:07:18,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 386 treesize of output 371 [2022-11-26 00:07:18,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:18,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:18,979 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:07:18,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 382 treesize of output 375 [2022-11-26 00:07:19,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:19,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:19,017 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-26 00:07:19,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 466 treesize of output 459 [2022-11-26 00:07:19,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:19,228 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:07:19,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 509 treesize of output 505 [2022-11-26 00:07:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:19,458 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-26 00:07:19,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 344 [2022-11-26 00:07:19,507 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:19,507 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 342 treesize of output 349 [2022-11-26 00:07:19,553 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:19,554 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 336 treesize of output 343 [2022-11-26 00:07:19,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:19,955 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:19,955 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 707 treesize of output 702 [2022-11-26 00:07:19,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:20,014 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:20,015 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 695 treesize of output 690 [2022-11-26 00:07:20,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:20,093 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-26 00:07:20,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 670 treesize of output 659 [2022-11-26 00:07:20,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:20,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:20,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:20,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:20,490 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:07:20,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 360 treesize of output 345 [2022-11-26 00:07:20,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:20,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:20,531 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:07:20,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 356 treesize of output 349 [2022-11-26 00:07:20,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:20,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:20,572 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:07:20,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 368 treesize of output 361 [2022-11-26 00:07:20,797 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-26 00:07:20,798 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 25 treesize of output 29 [2022-11-26 00:07:20,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:20,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:07:20,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-11-26 00:07:20,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:20,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-11-26 00:07:20,867 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 1 [2022-11-26 00:07:21,030 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:07:21,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-11-26 00:07:21,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:21,089 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 1 [2022-11-26 00:07:21,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:21,244 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:07:21,245 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 30 treesize of output 45 [2022-11-26 00:07:21,273 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 1 [2022-11-26 00:07:21,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:21,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:21,422 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 00:07:21,432 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 00:07:21,436 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:07:25,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2175#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:07:25,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:07:25,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:07:25,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-26 00:07:25,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107259860] [2022-11-26 00:07:25,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:07:25,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:07:25,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:25,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:07:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:07:25,344 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:25,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:25,395 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-11-26 00:07:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:07:25,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-26 00:07:25,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:25,396 INFO L225 Difference]: With dead ends: 39 [2022-11-26 00:07:25,396 INFO L226 Difference]: Without dead ends: 39 [2022-11-26 00:07:25,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:07:25,397 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:25,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:07:25,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-26 00:07:25,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-26 00:07:25,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-26 00:07:25,400 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 22 [2022-11-26 00:07:25,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:25,401 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-26 00:07:25,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-26 00:07:25,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:07:25,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:25,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:25,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:25,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:25,612 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:07:25,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:25,612 INFO L85 PathProgramCache]: Analyzing trace with hash 830242028, now seen corresponding path program 1 times [2022-11-26 00:07:25,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:25,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631515579] [2022-11-26 00:07:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:25,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:07:26,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:26,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631515579] [2022-11-26 00:07:26,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631515579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:07:26,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062970798] [2022-11-26 00:07:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:26,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:26,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:26,547 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:26,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:07:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:26,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-26 00:07:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:26,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:07:26,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:07:26,825 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:07:26,826 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 00:07:26,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:07:26,941 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 13 treesize of output 9 [2022-11-26 00:07:27,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-26 00:07:27,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:27,574 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 26 treesize of output 28 [2022-11-26 00:07:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:27,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:27,672 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-26 00:07:27,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 36 [2022-11-26 00:07:27,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:27,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:27,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:07:27,831 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 3 case distinctions, treesize of input 40 treesize of output 19 [2022-11-26 00:07:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:07:27,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:28,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-11-26 00:07:28,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:07:28,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 149 [2022-11-26 00:07:36,404 WARN L233 SmtUtils]: Spent 6.23s on a formula simplification. DAG size of input: 145 DAG size of output: 20 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:07:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:07:36,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062970798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:36,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035430595] [2022-11-26 00:07:36,770 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:07:36,771 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:07:36,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:07:36,771 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:07:36,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:07:36,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:07:36,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:07:36,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:07:36,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:07:36,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:07:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,907 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 25 treesize of output 13 [2022-11-26 00:07:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,923 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 25 treesize of output 13 [2022-11-26 00:07:36,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:07:36,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:36,981 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 41 treesize of output 31 [2022-11-26 00:07:37,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:37,001 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 23 treesize of output 13 [2022-11-26 00:07:37,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:37,019 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 23 treesize of output 13 [2022-11-26 00:07:37,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:07:37,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,194 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:07:37,194 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 2 case distinctions, treesize of input 345 treesize of output 327 [2022-11-26 00:07:37,247 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:37,248 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 339 treesize of output 346 [2022-11-26 00:07:37,305 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:37,306 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 333 treesize of output 340 [2022-11-26 00:07:37,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,653 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:37,655 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 672 treesize of output 673 [2022-11-26 00:07:37,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:37,722 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:37,723 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 666 treesize of output 667 [2022-11-26 00:07:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:37,783 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:07:37,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 647 treesize of output 628 [2022-11-26 00:07:38,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:38,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:38,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:38,206 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:07:38,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-11-26 00:07:38,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:38,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:38,250 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:07:38,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 352 treesize of output 345 [2022-11-26 00:07:38,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:38,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:38,290 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:07:38,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 364 treesize of output 357 [2022-11-26 00:07:38,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:38,501 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:07:38,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-11-26 00:07:38,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:38,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:38,697 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:07:38,698 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 2 case distinctions, treesize of input 345 treesize of output 327 [2022-11-26 00:07:38,739 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:38,739 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 339 treesize of output 346 [2022-11-26 00:07:38,779 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:07:38,779 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 333 treesize of output 340 [2022-11-26 00:07:39,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:39,089 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:39,089 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 672 treesize of output 673 [2022-11-26 00:07:39,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:39,145 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:07:39,145 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 666 treesize of output 667 [2022-11-26 00:07:39,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:39,199 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:07:39,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 647 treesize of output 628 [2022-11-26 00:07:39,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:39,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:39,536 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:07:39,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 379 treesize of output 372 [2022-11-26 00:07:39,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:39,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:39,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:39,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:39,571 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-26 00:07:39,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 467 treesize of output 452 [2022-11-26 00:07:39,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:39,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:39,612 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-26 00:07:39,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 463 treesize of output 456 [2022-11-26 00:07:39,868 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-26 00:07:39,872 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 25 treesize of output 29 [2022-11-26 00:07:39,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:39,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:07:39,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-11-26 00:07:39,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:39,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-11-26 00:07:39,956 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 1 [2022-11-26 00:07:40,069 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:07:40,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-11-26 00:07:40,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:40,133 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 1 [2022-11-26 00:07:40,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:40,387 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:07:40,388 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 30 treesize of output 45 [2022-11-26 00:07:40,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:40,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:40,444 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 1 [2022-11-26 00:07:40,614 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 00:07:40,620 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 00:07:40,623 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:07:46,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2444#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (= |ULTIMATE.start_sll_remove_first_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|)) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_#t~mem6#1.base|) 1)) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:07:46,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:07:46,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:07:46,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 43 [2022-11-26 00:07:46,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211128616] [2022-11-26 00:07:46,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:07:46,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-26 00:07:46,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:07:46,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-26 00:07:46,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2930, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 00:07:46,064 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 44 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:48,401 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-11-26 00:07:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:07:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:07:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:48,402 INFO L225 Difference]: With dead ends: 52 [2022-11-26 00:07:48,402 INFO L226 Difference]: Without dead ends: 52 [2022-11-26 00:07:48,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=580, Invalid=4970, Unknown=0, NotChecked=0, Total=5550 [2022-11-26 00:07:48,405 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 143 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:48,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 144 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:07:48,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-26 00:07:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-11-26 00:07:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:48,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-11-26 00:07:48,409 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 23 [2022-11-26 00:07:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:48,409 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-11-26 00:07:48,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-11-26 00:07:48,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:07:48,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:48,413 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:48,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:48,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:07:48,614 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:07:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:48,614 INFO L85 PathProgramCache]: Analyzing trace with hash 830242029, now seen corresponding path program 1 times [2022-11-26 00:07:48,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:07:48,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145201551] [2022-11-26 00:07:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:48,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:07:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:07:49,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:49,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145201551] [2022-11-26 00:07:49,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145201551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:07:49,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205047459] [2022-11-26 00:07:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:49,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:49,935 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:49,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:07:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:50,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-26 00:07:50,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:50,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:07:50,344 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:07:50,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-11-26 00:07:50,366 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:07:50,366 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 00:07:50,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:50,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:07:51,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:07:51,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:07:51,272 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-26 00:07:51,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 77 [2022-11-26 00:07:51,289 INFO L321 Elim1Store]: treesize reduction 49, result has 5.8 percent of original size [2022-11-26 00:07:51,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 47 [2022-11-26 00:07:51,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:07:51,470 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 36 treesize of output 16 [2022-11-26 00:07:51,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:07:51,477 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 1 case distinctions, treesize of input 35 treesize of output 15 [2022-11-26 00:07:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:07:51,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:52,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:07:52,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 356 treesize of output 358 [2022-11-26 00:07:52,514 INFO L321 Elim1Store]: treesize reduction 26, result has 76.6 percent of original size [2022-11-26 00:07:52,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 738 treesize of output 704 [2022-11-26 00:07:57,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 122 [2022-11-26 00:07:57,987 INFO L321 Elim1Store]: treesize reduction 57, result has 48.6 percent of original size [2022-11-26 00:07:57,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 288 treesize of output 295 [2022-11-26 00:08:00,613 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 30 treesize of output 26 [2022-11-26 00:08:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:00,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205047459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:00,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [4580125] [2022-11-26 00:08:00,683 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:08:00,683 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:08:00,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:08:00,683 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:08:00,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:08:00,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:08:00,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:08:00,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:08:00,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:08:00,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:08:00,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:08:00,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,847 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 25 treesize of output 13 [2022-11-26 00:08:00,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,862 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 25 treesize of output 13 [2022-11-26 00:08:00,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,898 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 41 treesize of output 31 [2022-11-26 00:08:00,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:00,916 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 23 treesize of output 13 [2022-11-26 00:08:00,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:00,935 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 23 treesize of output 13 [2022-11-26 00:08:00,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:00,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:08:01,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:01,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:01,049 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:08:01,049 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 2 case distinctions, treesize of input 352 treesize of output 334 [2022-11-26 00:08:01,094 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:01,095 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 346 treesize of output 353 [2022-11-26 00:08:01,145 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:01,146 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 340 treesize of output 347 [2022-11-26 00:08:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:01,649 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:08:01,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1183 treesize of output 1132 [2022-11-26 00:08:01,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:01,728 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:01,729 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 1180 treesize of output 1175 [2022-11-26 00:08:01,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:01,793 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:01,794 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 1168 treesize of output 1163 [2022-11-26 00:08:02,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:02,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:02,392 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:08:02,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 369 treesize of output 362 [2022-11-26 00:08:02,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:02,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:02,436 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-26 00:08:02,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 447 treesize of output 440 [2022-11-26 00:08:02,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:02,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:02,473 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-26 00:08:02,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 487 treesize of output 472 [2022-11-26 00:08:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:02,652 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:08:02,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 472 treesize of output 468 [2022-11-26 00:08:02,879 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:02,880 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 346 treesize of output 353 [2022-11-26 00:08:02,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:02,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:02,909 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:08:02,909 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 2 case distinctions, treesize of input 346 treesize of output 328 [2022-11-26 00:08:02,957 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:02,957 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 340 treesize of output 347 [2022-11-26 00:08:03,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:03,137 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:08:03,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 360 treesize of output 361 [2022-11-26 00:08:03,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:03,197 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:03,198 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 369 treesize of output 370 [2022-11-26 00:08:03,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:03,251 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:03,252 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 363 treesize of output 364 [2022-11-26 00:08:03,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:03,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:03,559 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:08:03,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 352 treesize of output 345 [2022-11-26 00:08:03,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:03,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:03,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:03,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:03,603 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-26 00:08:03,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 428 treesize of output 413 [2022-11-26 00:08:03,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:03,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:03,648 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-26 00:08:03,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 424 treesize of output 417 [2022-11-26 00:08:03,904 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-26 00:08:03,905 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 25 treesize of output 29 [2022-11-26 00:08:03,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:03,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:03,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-11-26 00:08:03,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:03,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-11-26 00:08:03,990 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 1 [2022-11-26 00:08:04,140 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:08:04,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-11-26 00:08:04,191 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 1 [2022-11-26 00:08:04,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:04,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:04,354 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:08:04,355 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 30 treesize of output 45 [2022-11-26 00:08:04,384 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 1 [2022-11-26 00:08:04,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:04,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:04,524 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 00:08:04,531 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 00:08:04,536 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:08:10,527 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2766#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (or (not (<= (+ 8 |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset|) (select |#length| |ULTIMATE.start_sll_remove_first_#t~mem6#1.base|))) (not (<= 0 (+ |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset| 4)))) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:08:10,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:08:10,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:08:10,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 47 [2022-11-26 00:08:10,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259141055] [2022-11-26 00:08:10,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:08:10,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-26 00:08:10,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:08:10,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-26 00:08:10,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=3395, Unknown=0, NotChecked=0, Total=3660 [2022-11-26 00:08:10,531 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:08:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:14,373 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-11-26 00:08:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:08:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:08:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:14,374 INFO L225 Difference]: With dead ends: 70 [2022-11-26 00:08:14,375 INFO L226 Difference]: Without dead ends: 70 [2022-11-26 00:08:14,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=902, Invalid=6238, Unknown=0, NotChecked=0, Total=7140 [2022-11-26 00:08:14,377 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 546 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:14,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 200 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:08:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-26 00:08:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2022-11-26 00:08:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2) internal successors, (42), 40 states have internal predecessors, (42), 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 00:08:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-26 00:08:14,381 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 23 [2022-11-26 00:08:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:14,381 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-26 00:08:14,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:08:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-26 00:08:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:08:14,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:14,383 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:08:14,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:14,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:14,590 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:08:14,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:14,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1001289899, now seen corresponding path program 1 times [2022-11-26 00:08:14,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:14,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672222160] [2022-11-26 00:08:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:14,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:15,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:08:15,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672222160] [2022-11-26 00:08:15,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672222160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:08:15,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756559502] [2022-11-26 00:08:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:15,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:15,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:15,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:15,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:08:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-26 00:08:15,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:15,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:15,707 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:08:15,976 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 00:08:15,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 33 [2022-11-26 00:08:16,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:16,104 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 26 treesize of output 10 [2022-11-26 00:08:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:16,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:16,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-11-26 00:08:16,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:16,429 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 88 treesize of output 88 [2022-11-26 00:08:16,437 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 59 treesize of output 55 [2022-11-26 00:08:16,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:16,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 154 [2022-11-26 00:08:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:17,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756559502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:17,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896771965] [2022-11-26 00:08:17,081 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:08:17,081 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:08:17,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:08:17,082 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:08:17,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:08:17,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:08:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:08:17,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:08:17,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:08:17,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:08:17,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,228 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 25 treesize of output 13 [2022-11-26 00:08:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:08:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,256 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 25 treesize of output 13 [2022-11-26 00:08:17,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,286 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 41 treesize of output 31 [2022-11-26 00:08:17,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:17,304 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 23 treesize of output 13 [2022-11-26 00:08:17,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:17,318 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 23 treesize of output 13 [2022-11-26 00:08:17,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:08:17,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,468 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-26 00:08:17,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 337 [2022-11-26 00:08:17,519 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:17,519 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 335 treesize of output 342 [2022-11-26 00:08:17,566 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:17,567 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 329 treesize of output 336 [2022-11-26 00:08:17,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:17,903 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-26 00:08:17,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 669 treesize of output 654 [2022-11-26 00:08:17,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:17,968 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:17,969 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 674 treesize of output 675 [2022-11-26 00:08:17,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:18,028 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:18,029 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 668 treesize of output 669 [2022-11-26 00:08:18,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:18,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:18,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:18,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:18,516 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:08:18,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 352 treesize of output 337 [2022-11-26 00:08:18,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:18,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:18,559 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:08:18,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 348 treesize of output 341 [2022-11-26 00:08:18,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:18,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:18,597 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:08:18,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 360 treesize of output 353 [2022-11-26 00:08:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:18,788 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:08:18,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 415 treesize of output 419 [2022-11-26 00:08:18,980 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:18,980 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 339 treesize of output 346 [2022-11-26 00:08:18,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:19,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:19,039 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-26 00:08:19,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 339 treesize of output 331 [2022-11-26 00:08:19,088 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:19,088 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 329 treesize of output 336 [2022-11-26 00:08:19,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:19,523 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:19,523 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 999 treesize of output 994 [2022-11-26 00:08:19,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:19,616 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-26 00:08:19,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 974 treesize of output 943 [2022-11-26 00:08:19,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:19,689 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:19,689 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 979 treesize of output 974 [2022-11-26 00:08:20,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:20,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:20,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:20,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:20,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:20,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:20,277 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:08:20,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 378 treesize of output 363 [2022-11-26 00:08:20,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:20,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:20,331 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:08:20,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 374 treesize of output 367 [2022-11-26 00:08:20,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:20,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:20,375 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-26 00:08:20,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 422 treesize of output 415 [2022-11-26 00:08:20,565 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-26 00:08:20,565 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 25 treesize of output 29 [2022-11-26 00:08:20,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:20,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:20,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-11-26 00:08:20,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:20,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-11-26 00:08:20,638 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 1 [2022-11-26 00:08:20,783 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:08:20,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-11-26 00:08:20,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:20,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:20,840 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 1 [2022-11-26 00:08:20,998 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:08:20,998 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 30 treesize of output 45 [2022-11-26 00:08:21,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:21,031 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 1 [2022-11-26 00:08:21,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:21,170 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 00:08:21,179 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 00:08:21,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:08:26,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3119#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (not (= |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset| 0)) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:08:26,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:08:26,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:08:26,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 36 [2022-11-26 00:08:26,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110361371] [2022-11-26 00:08:26,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:08:26,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-26 00:08:26,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:08:26,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-26 00:08:26,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2181, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 00:08:26,772 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 states have internal predecessors, (59), 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 00:08:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:27,823 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2022-11-26 00:08:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:08:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 states have internal predecessors, (59), 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 25 [2022-11-26 00:08:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:27,824 INFO L225 Difference]: With dead ends: 65 [2022-11-26 00:08:27,824 INFO L226 Difference]: Without dead ends: 65 [2022-11-26 00:08:27,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=690, Invalid=3732, Unknown=0, NotChecked=0, Total=4422 [2022-11-26 00:08:27,826 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 342 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:27,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 210 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:08:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-26 00:08:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2022-11-26 00:08:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 42 states have internal predecessors, (44), 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 00:08:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-26 00:08:27,830 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 25 [2022-11-26 00:08:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:27,830 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-26 00:08:27,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 states have internal predecessors, (59), 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 00:08:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-26 00:08:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:08:27,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:27,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:08:27,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:28,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:28,039 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:08:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash -975215707, now seen corresponding path program 1 times [2022-11-26 00:08:28,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:28,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589922545] [2022-11-26 00:08:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:28,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:28,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:28,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:08:28,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589922545] [2022-11-26 00:08:28,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589922545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:08:28,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589239462] [2022-11-26 00:08:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:28,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:28,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:28,893 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:28,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:08:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:29,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-26 00:08:29,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:29,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:29,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-26 00:08:29,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:29,788 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2022-11-26 00:08:29,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:29,921 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 28 treesize of output 12 [2022-11-26 00:08:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:29,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:30,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-11-26 00:08:30,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:30,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 134 [2022-11-26 00:08:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:30,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589239462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:30,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1553896618] [2022-11-26 00:08:30,940 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-26 00:08:30,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:08:30,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:08:30,941 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:08:30,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:08:30,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:08:30,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:30,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:08:31,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:08:31,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:08:31,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:08:31,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:08:31,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,077 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 25 treesize of output 13 [2022-11-26 00:08:31,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,096 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 25 treesize of output 13 [2022-11-26 00:08:31,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,127 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 41 treesize of output 31 [2022-11-26 00:08:31,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:31,144 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 23 treesize of output 13 [2022-11-26 00:08:31,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:31,157 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 23 treesize of output 13 [2022-11-26 00:08:31,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:08:31,303 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:31,304 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 339 treesize of output 346 [2022-11-26 00:08:31,350 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:31,350 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 333 treesize of output 340 [2022-11-26 00:08:31,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,415 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-26 00:08:31,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 333 treesize of output 325 [2022-11-26 00:08:31,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:31,795 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-26 00:08:31,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 669 treesize of output 654 [2022-11-26 00:08:31,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,861 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:31,862 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 674 treesize of output 675 [2022-11-26 00:08:31,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:31,919 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:31,919 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 668 treesize of output 669 [2022-11-26 00:08:32,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:32,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:32,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:32,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:32,358 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:08:32,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-11-26 00:08:32,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:32,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:32,399 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:08:32,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 352 treesize of output 345 [2022-11-26 00:08:32,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:32,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:32,439 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:08:32,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 364 treesize of output 357 [2022-11-26 00:08:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:32,648 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:08:32,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-11-26 00:08:32,853 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:32,854 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 339 treesize of output 346 [2022-11-26 00:08:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:32,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:32,914 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-26 00:08:32,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 339 treesize of output 331 [2022-11-26 00:08:32,965 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:08:32,965 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 329 treesize of output 336 [2022-11-26 00:08:33,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:33,481 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-26 00:08:33,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1165 treesize of output 1118 [2022-11-26 00:08:33,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:33,565 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:33,566 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 1162 treesize of output 1157 [2022-11-26 00:08:33,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:33,635 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:08:33,636 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 1150 treesize of output 1145 [2022-11-26 00:08:34,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:34,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:34,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:34,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:34,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:34,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:34,283 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:08:34,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 379 treesize of output 364 [2022-11-26 00:08:34,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:34,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:34,324 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:08:34,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 375 treesize of output 368 [2022-11-26 00:08:34,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:34,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:34,363 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-26 00:08:34,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 453 treesize of output 446 [2022-11-26 00:08:34,569 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-26 00:08:34,569 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 25 treesize of output 29 [2022-11-26 00:08:34,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:34,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:34,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-11-26 00:08:34,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:34,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-11-26 00:08:34,636 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 1 [2022-11-26 00:08:34,758 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:08:34,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-11-26 00:08:34,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:34,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:08:34,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:35,043 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:08:35,043 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 30 treesize of output 45 [2022-11-26 00:08:35,087 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 1 [2022-11-26 00:08:35,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:35,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:08:35,230 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 00:08:35,241 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 00:08:35,243 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:08:40,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3461#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset| 0) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (not (< |ULTIMATE.start_sll_remove_first_#t~mem8#1.base| |#StackHeapBarrier|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:08:40,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:08:40,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:08:40,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 36 [2022-11-26 00:08:40,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973204313] [2022-11-26 00:08:40,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:08:40,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-26 00:08:40,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:08:40,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-26 00:08:40,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 00:08:40,699 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:08:42,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:42,293 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-11-26 00:08:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:08:42,294 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-26 00:08:42,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:42,295 INFO L225 Difference]: With dead ends: 64 [2022-11-26 00:08:42,295 INFO L226 Difference]: Without dead ends: 64 [2022-11-26 00:08:42,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=645, Invalid=3777, Unknown=0, NotChecked=0, Total=4422 [2022-11-26 00:08:42,298 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 543 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:42,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 110 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:08:42,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-26 00:08:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2022-11-26 00:08:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 43 states have internal predecessors, (45), 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 00:08:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-11-26 00:08:42,301 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 26 [2022-11-26 00:08:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:42,301 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-11-26 00:08:42,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:08:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-11-26 00:08:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-26 00:08:42,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:42,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-11-26 00:08:42,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:42,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:42,506 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:08:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash 471864012, now seen corresponding path program 2 times [2022-11-26 00:08:42,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:42,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480369937] [2022-11-26 00:08:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:42,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:08:42,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:08:42,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480369937] [2022-11-26 00:08:42,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480369937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:08:42,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754459] [2022-11-26 00:08:42,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:08:42,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:42,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:42,619 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:42,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:08:42,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:08:42,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:08:42,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:08:42,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:08:42,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:08:42,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:08:42,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:08:42,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-26 00:08:42,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806306887] [2022-11-26 00:08:42,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:08:42,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:08:42,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:08:42,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:08:42,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:08:42,902 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 00:08:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:42,961 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-11-26 00:08:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:08:42,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 31 [2022-11-26 00:08:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:42,964 INFO L225 Difference]: With dead ends: 35 [2022-11-26 00:08:42,964 INFO L226 Difference]: Without dead ends: 35 [2022-11-26 00:08:42,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:08:42,965 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:42,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:08:42,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-26 00:08:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-26 00:08:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 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 00:08:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-11-26 00:08:42,967 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2022-11-26 00:08:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:42,967 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-11-26 00:08:42,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 00:08:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-11-26 00:08:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:08:42,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:42,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:08:42,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:43,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-26 00:08:43,169 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:08:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:43,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1744487377, now seen corresponding path program 1 times [2022-11-26 00:08:43,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:08:43,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281922796] [2022-11-26 00:08:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:43,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:08:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:44,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:08:44,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281922796] [2022-11-26 00:08:44,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281922796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:08:44,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769047204] [2022-11-26 00:08:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:08:44,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:44,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:44,562 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:44,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:08:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:08:44,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-26 00:08:44,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:45,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:08:45,451 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 13 treesize of output 9 [2022-11-26 00:08:45,458 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 13 treesize of output 9 [2022-11-26 00:08:46,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-26 00:08:46,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:08:46,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:46,679 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-26 00:08:46,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 63 [2022-11-26 00:08:47,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:08:47,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:47,069 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 3 case distinctions, treesize of input 79 treesize of output 46 [2022-11-26 00:08:47,435 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_18| Int) (v_ArrVal_1442 Int) (v_ArrVal_1443 Int) (v_arrayElimCell_810 Int) (|v_ULTIMATE.start_sll_remove_first_#t~mem8#1.base_51| Int)) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#s~0#1.base_18| v_ArrVal_1442))) (let ((.cse0 (store .cse1 |v_ULTIMATE.start_sll_remove_first_#t~mem8#1.base_51| v_ArrVal_1443))) (and (= |c_#valid| (store (store (store .cse0 v_arrayElimCell_810 0) |v_ULTIMATE.start_sll_remove_first_#t~mem8#1.base_51| 0) |v_ULTIMATE.start_main_~#s~0#1.base_18| 0)) (= (select .cse1 |v_ULTIMATE.start_sll_remove_first_#t~mem8#1.base_51|) 0) (= 0 (select .cse0 v_arrayElimCell_810)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#s~0#1.base_18|) 0) (<= (+ 2 |v_ULTIMATE.start_sll_remove_first_#t~mem8#1.base_51|) |v_ULTIMATE.start_main_~#s~0#1.base_18|))))) is different from true [2022-11-26 00:08:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:47,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:48,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-11-26 00:08:50,075 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_antiDerIndex_entry0_1 Int)) (= (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1) (select (store (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_first_~head#1.base|))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_sll_remove_first_~head#1.offset|))) (store (store |c_#valid| .cse0 0) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_first_~head#1.base| (store .cse1 |c_ULTIMATE.start_sll_remove_first_~head#1.offset| (select (select |c_#memory_$Pointer$.base| .cse0) 4))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0))) |c_ULTIMATE.start_main_~#s~0#1.base| 0) v_antiDerIndex_entry0_1))) is different from false [2022-11-26 00:08:52,088 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_antiDerIndex_entry0_1 Int)) (= (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_1) (select (store (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (store (store |c_#valid| .cse0 0) (select (select |c_#memory_$Pointer$.base| .cse0) 4) 0)) |c_ULTIMATE.start_main_~#s~0#1.base| 0) v_antiDerIndex_entry0_1))) is different from false [2022-11-26 00:08:54,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:08:54,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 183 [2022-11-26 00:11:39,460 WARN L233 SmtUtils]: Spent 2.62m on a formula simplification. DAG size of input: 273 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:12:29,216 WARN L233 SmtUtils]: Spent 49.00s on a formula simplification. DAG size of input: 114 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:12:33,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-26 00:12:33,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769047204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:12:33,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [261065231] [2022-11-26 00:12:33,446 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:12:33,446 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:12:33,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:12:33,447 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:12:33,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:12:33,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:12:33,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:12:33,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:12:33,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:12:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:12:33,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:12:33,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,607 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 25 treesize of output 13 [2022-11-26 00:12:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,621 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 25 treesize of output 13 [2022-11-26 00:12:33,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:33,651 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 23 treesize of output 13 [2022-11-26 00:12:33,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:33,667 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 23 treesize of output 13 [2022-11-26 00:12:33,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,686 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 41 treesize of output 31 [2022-11-26 00:12:33,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:12:33,901 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:12:33,901 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 346 treesize of output 353 [2022-11-26 00:12:33,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:33,935 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:12:33,936 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 2 case distinctions, treesize of input 346 treesize of output 328 [2022-11-26 00:12:33,997 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:12:33,998 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 340 treesize of output 347 [2022-11-26 00:12:34,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:34,458 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:12:34,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1183 treesize of output 1132 [2022-11-26 00:12:34,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,551 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:12:34,552 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 1180 treesize of output 1175 [2022-11-26 00:12:34,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:34,636 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:12:34,637 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 1168 treesize of output 1163 [2022-11-26 00:12:35,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:35,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:35,148 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:12:35,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 348 treesize of output 341 [2022-11-26 00:12:35,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:35,185 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-26 00:12:35,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 403 [2022-11-26 00:12:35,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:35,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:35,229 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-26 00:12:35,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 414 treesize of output 407 [2022-11-26 00:12:35,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,433 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:12:35,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 415 treesize of output 419 [2022-11-26 00:12:35,639 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:12:35,640 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 346 treesize of output 353 [2022-11-26 00:12:35,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:35,671 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:12:35,672 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 2 case distinctions, treesize of input 346 treesize of output 328 [2022-11-26 00:12:35,730 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:12:35,730 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 340 treesize of output 347 [2022-11-26 00:12:35,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:36,035 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:12:36,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 673 treesize of output 654 [2022-11-26 00:12:36,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:36,123 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:12:36,123 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 678 treesize of output 679 [2022-11-26 00:12:36,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:36,189 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:12:36,189 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 672 treesize of output 673 [2022-11-26 00:12:36,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:36,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:36,671 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:12:36,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 367 treesize of output 360 [2022-11-26 00:12:36,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:36,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:36,728 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-26 00:12:36,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 403 treesize of output 396 [2022-11-26 00:12:36,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:36,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:36,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:36,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:12:36,765 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-26 00:12:36,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 485 treesize of output 470 [2022-11-26 00:12:36,971 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-26 00:12:36,972 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 25 treesize of output 29 [2022-11-26 00:12:37,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:37,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:12:37,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-11-26 00:12:37,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:12:37,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-11-26 00:12:37,043 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 1 [2022-11-26 00:12:37,184 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:12:37,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-11-26 00:12:37,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:12:37,246 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 1 [2022-11-26 00:12:37,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:12:37,497 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:12:37,497 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 30 treesize of output 45 [2022-11-26 00:12:37,540 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 1 [2022-11-26 00:12:37,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:12:37,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:12:37,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 00:12:37,792 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 00:12:37,816 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 00:12:37,820 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:47,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4032#(and (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_19| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_19|) 0) 0) (<= 0 |v_ULTIMATE.start_main_~#s~0#1.base_19|) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#s~0#1.base_19|)) (= 0 (select |#valid| |v_ULTIMATE.start_main_~#s~0#1.base_19|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_19|) 0) 0))) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-26 00:12:47,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:47,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:47,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 54 [2022-11-26 00:12:47,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9304349] [2022-11-26 00:12:47,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:47,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-26 00:12:47,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:47,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-26 00:12:47,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=4439, Unknown=4, NotChecked=408, Total=5112 [2022-11-26 00:12:47,406 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 56 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:56,963 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-11-26 00:12:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:12:56,964 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 55 states have internal predecessors, (91), 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 32 [2022-11-26 00:12:56,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:56,964 INFO L225 Difference]: With dead ends: 62 [2022-11-26 00:12:56,964 INFO L226 Difference]: Without dead ends: 61 [2022-11-26 00:12:56,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 238.9s TimeCoverageRelationStatistics Valid=510, Invalid=7154, Unknown=4, NotChecked=522, Total=8190 [2022-11-26 00:12:56,967 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 99 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:56,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 99 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 713 Invalid, 0 Unknown, 132 Unchecked, 2.9s Time] [2022-11-26 00:12:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-26 00:12:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2022-11-26 00:12:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-11-26 00:12:56,973 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 32 [2022-11-26 00:12:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:56,973 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-11-26 00:12:56,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.6545454545454545) internal successors, (91), 55 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:12:56,975 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-11-26 00:12:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-26 00:12:56,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:56,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:56,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:57,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-26 00:12:57,177 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:12:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1744487312, now seen corresponding path program 1 times [2022-11-26 00:12:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:57,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914992633] [2022-11-26 00:12:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:57,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:12:59,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:59,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914992633] [2022-11-26 00:12:59,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914992633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:59,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942946072] [2022-11-26 00:12:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:59,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:59,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:59,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:59,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:12:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:59,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-26 00:12:59,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:59,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:13:00,009 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:13:00,009 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 00:13:00,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:13:00,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:13:00,367 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:13:00,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:13:00,397 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:13:00,397 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 14 treesize of output 20 [2022-11-26 00:13:00,505 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:13:00,506 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 18 treesize of output 24 [2022-11-26 00:13:00,533 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:13:00,534 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 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-26 00:13:00,657 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:13:00,657 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 23 treesize of output 26 [2022-11-26 00:13:00,684 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:13:00,684 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 26 treesize of output 36 [2022-11-26 00:13:01,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:13:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:01,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:01,865 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-26 00:13:01,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 68 [2022-11-26 00:13:01,872 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 50 treesize of output 48 [2022-11-26 00:13:01,878 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 21 treesize of output 17 [2022-11-26 00:13:02,575 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-11-26 00:13:02,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 108 [2022-11-26 00:13:03,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:03,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:03,382 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:13:03,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 83 [2022-11-26 00:13:03,390 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:13:03,391 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 58 [2022-11-26 00:13:03,573 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:13:03,573 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 39 [2022-11-26 00:13:03,580 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 26 treesize of output 10 [2022-11-26 00:13:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:03,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:04,464 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 34 treesize of output 20 [2022-11-26 00:13:04,485 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_first_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_remove_first_~head#1.base|) |c_ULTIMATE.start_sll_remove_first_~head#1.offset| |c_ULTIMATE.start_sll_remove_first_~temp~1#1.base|)))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= .cse0 |c_ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (and (or (forall ((v_ArrVal_1579 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_remove_first_~head#1.base| v_ArrVal_1579) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (= (select (select .cse1 .cse0) 4) 0)) (forall ((v_ArrVal_1579 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_remove_first_~head#1.base| v_ArrVal_1579))) (or (not (= 0 (select (select .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (= (select (select .cse2 .cse0) 4) 0)))))))) is different from false [2022-11-26 00:13:05,390 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 6 treesize of output 4 [2022-11-26 00:13:06,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:06,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 220 [2022-11-26 00:13:07,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:07,723 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 242 treesize of output 152 [2022-11-26 00:13:07,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:07,732 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 122 [2022-11-26 00:13:07,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:07,944 INFO L321 Elim1Store]: treesize reduction 8, result has 95.7 percent of original size [2022-11-26 00:13:07,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 1395 treesize of output 1362 [2022-11-26 00:13:08,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:08,008 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 2559 treesize of output 2278 [2022-11-26 00:13:08,065 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 2261 treesize of output 2117 [2022-11-26 00:13:08,238 INFO L321 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2022-11-26 00:13:08,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2148 treesize of output 1844 [2022-11-26 00:13:09,795 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 5 treesize of output 3 [2022-11-26 00:13:09,835 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 16 treesize of output 10 [2022-11-26 00:13:10,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:10,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 113 [2022-11-26 00:13:10,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:10,429 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 121 [2022-11-26 00:13:10,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:10,442 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 91 [2022-11-26 00:13:10,522 INFO L321 Elim1Store]: treesize reduction 66, result has 36.5 percent of original size [2022-11-26 00:13:10,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 319 treesize of output 262 [2022-11-26 00:13:10,745 INFO L321 Elim1Store]: treesize reduction 66, result has 63.3 percent of original size [2022-11-26 00:13:10,746 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 7 new quantified variables, introduced 15 case distinctions, treesize of input 827 treesize of output 814 [2022-11-26 00:13:10,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:10,825 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 748 treesize of output 698 [2022-11-26 00:13:10,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:10,872 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 566 treesize of output 540 [2022-11-26 00:13:11,018 INFO L321 Elim1Store]: treesize reduction 16, result has 69.8 percent of original size [2022-11-26 00:13:11,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 760 treesize of output 622 [2022-11-26 00:13:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-26 00:13:12,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942946072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:12,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [430082266] [2022-11-26 00:13:12,649 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:13:12,649 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:13:12,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:13:12,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:13:12,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:13:12,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:13:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-26 00:13:12,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-26 00:13:12,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:13:12,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:13:12,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,770 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 25 treesize of output 13 [2022-11-26 00:13:12,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:13:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,800 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 25 treesize of output 13 [2022-11-26 00:13:12,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,835 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 41 treesize of output 31 [2022-11-26 00:13:12,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:12,849 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 23 treesize of output 13 [2022-11-26 00:13:12,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:12,864 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 23 treesize of output 13 [2022-11-26 00:13:12,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-26 00:13:12,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:12,984 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:13:12,985 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 2 case distinctions, treesize of input 345 treesize of output 327 [2022-11-26 00:13:13,037 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:13:13,037 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 339 treesize of output 346 [2022-11-26 00:13:13,095 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:13:13,095 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 333 treesize of output 340 [2022-11-26 00:13:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:13,285 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:13:13,285 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 366 treesize of output 367 [2022-11-26 00:13:13,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:13,344 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:13:13,344 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 360 treesize of output 361 [2022-11-26 00:13:13,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:13,400 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:13:13,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 341 treesize of output 342 [2022-11-26 00:13:13,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:13,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:13,700 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:13:13,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 373 treesize of output 366 [2022-11-26 00:13:13,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:13,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:13,752 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-26 00:13:13,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 415 treesize of output 408 [2022-11-26 00:13:13,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:13,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:13,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:13,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:13,792 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-26 00:13:13,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 497 treesize of output 482 [2022-11-26 00:13:13,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:14,042 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-11-26 00:13:14,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 482 treesize of output 486 [2022-11-26 00:13:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:14,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:14,281 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:13:14,282 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 2 case distinctions, treesize of input 345 treesize of output 327 [2022-11-26 00:13:14,338 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:13:14,338 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 339 treesize of output 346 [2022-11-26 00:13:14,408 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:13:14,409 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 333 treesize of output 340 [2022-11-26 00:13:14,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:14,660 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:13:14,661 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 366 treesize of output 367 [2022-11-26 00:13:14,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:14,731 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:13:14,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 348 [2022-11-26 00:13:14,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:14,807 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-26 00:13:14,807 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 356 treesize of output 357 [2022-11-26 00:13:15,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:15,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:15,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:15,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:15,104 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-26 00:13:15,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 381 treesize of output 366 [2022-11-26 00:13:15,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:15,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:15,148 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-26 00:13:15,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 377 treesize of output 370 [2022-11-26 00:13:15,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:15,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:13:15,195 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-26 00:13:15,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 419 treesize of output 412 [2022-11-26 00:13:15,413 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-26 00:13:15,413 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 25 treesize of output 29 [2022-11-26 00:13:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:15,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:13:15,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-11-26 00:13:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:13:15,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-11-26 00:13:15,486 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 1 [2022-11-26 00:13:15,627 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:13:15,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-11-26 00:13:15,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:13:15,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:13:15,703 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 1 [2022-11-26 00:13:16,004 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-11-26 00:13:16,005 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 30 treesize of output 45 [2022-11-26 00:13:16,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:13:16,060 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 11 treesize of output 7 [2022-11-26 00:13:16,070 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 1 [2022-11-26 00:13:16,233 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 00:13:16,241 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 00:13:16,244 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:13:24,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4458#(and (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 0))) (< |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= (+ |ULTIMATE.start_main_~#s~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:13:24,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:13:24,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:13:24,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 64 [2022-11-26 00:13:24,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721965631] [2022-11-26 00:13:24,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:24,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-26 00:13:24,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:24,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-26 00:13:24,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=5740, Unknown=97, NotChecked=154, Total=6320 [2022-11-26 00:13:24,718 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 65 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 64 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:38,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:38,873 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-11-26 00:13:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:13:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 64 states have internal predecessors, (90), 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 32 [2022-11-26 00:13:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:38,874 INFO L225 Difference]: With dead ends: 61 [2022-11-26 00:13:38,874 INFO L226 Difference]: Without dead ends: 42 [2022-11-26 00:13:38,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=651, Invalid=8944, Unknown=111, NotChecked=194, Total=9900 [2022-11-26 00:13:38,877 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 102 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:38,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 225 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1302 Invalid, 0 Unknown, 41 Unchecked, 2.9s Time] [2022-11-26 00:13:38,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-26 00:13:38,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-11-26 00:13:38,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-11-26 00:13:38,879 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 32 [2022-11-26 00:13:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:38,880 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-11-26 00:13:38,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 64 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-11-26 00:13:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:13:38,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:38,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:38,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:39,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:39,087 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-26 00:13:39,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:39,087 INFO L85 PathProgramCache]: Analyzing trace with hash 702804737, now seen corresponding path program 2 times [2022-11-26 00:13:39,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:39,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419415002] [2022-11-26 00:13:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:13:39,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:39,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419415002] [2022-11-26 00:13:39,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419415002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:39,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472069516] [2022-11-26 00:13:39,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:13:39,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:39,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:39,206 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:39,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:13:39,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:13:39,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:39,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:13:39,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:13:39,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:13:39,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472069516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:13:39,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:13:39,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-26 00:13:39,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356425721] [2022-11-26 00:13:39,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:13:39,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:13:39,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:39,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:13:39,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:13:39,732 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:39,757 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2022-11-26 00:13:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:13:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-26 00:13:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:39,758 INFO L225 Difference]: With dead ends: 12 [2022-11-26 00:13:39,758 INFO L226 Difference]: Without dead ends: 0 [2022-11-26 00:13:39,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:13:39,759 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:39,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:13:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-26 00:13:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-26 00:13:39,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-26 00:13:39,760 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2022-11-26 00:13:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:39,760 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-26 00:13:39,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-26 00:13:39,761 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-26 00:13:39,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 21 remaining) [2022-11-26 00:13:39,764 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2022-11-26 00:13:39,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2022-11-26 00:13:39,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2022-11-26 00:13:39,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2022-11-26 00:13:39,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2022-11-26 00:13:39,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2022-11-26 00:13:39,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2022-11-26 00:13:39,765 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 21 remaining) [2022-11-26 00:13:39,766 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 21 remaining) [2022-11-26 00:13:39,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 21 remaining) [2022-11-26 00:13:39,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 21 remaining) [2022-11-26 00:13:39,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (8 of 21 remaining) [2022-11-26 00:13:39,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (7 of 21 remaining) [2022-11-26 00:13:39,767 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (6 of 21 remaining) [2022-11-26 00:13:39,768 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 21 remaining) [2022-11-26 00:13:39,768 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 21 remaining) [2022-11-26 00:13:39,768 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 21 remaining) [2022-11-26 00:13:39,768 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 21 remaining) [2022-11-26 00:13:39,769 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (1 of 21 remaining) [2022-11-26 00:13:39,769 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2022-11-26 00:13:39,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:39,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:13:39,980 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:39,982 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:13:39,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:13:39 BoogieIcfgContainer [2022-11-26 00:13:39,985 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:13:39,986 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:13:39,986 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:13:39,986 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:13:39,987 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:06:26" (3/4) ... [2022-11-26 00:13:39,990 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-26 00:13:40,005 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2022-11-26 00:13:40,006 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-11-26 00:13:40,007 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-26 00:13:40,007 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 00:13:40,057 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:13:40,057 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:13:40,058 INFO L158 Benchmark]: Toolchain (without parser) took 435273.87ms. Allocated memory was 136.3MB in the beginning and 536.9MB in the end (delta: 400.6MB). Free memory was 83.1MB in the beginning and 342.4MB in the end (delta: -259.3MB). Peak memory consumption was 145.3MB. Max. memory is 16.1GB. [2022-11-26 00:13:40,059 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 136.3MB. Free memory was 109.1MB in the beginning and 108.9MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:13:40,059 INFO L158 Benchmark]: CACSL2BoogieTranslator took 675.92ms. Allocated memory was 136.3MB in the beginning and 205.5MB in the end (delta: 69.2MB). Free memory was 82.8MB in the beginning and 172.2MB in the end (delta: -89.3MB). Peak memory consumption was 25.1MB. Max. memory is 16.1GB. [2022-11-26 00:13:40,059 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.27ms. Allocated memory is still 205.5MB. Free memory was 172.2MB in the beginning and 169.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:13:40,060 INFO L158 Benchmark]: Boogie Preprocessor took 59.50ms. Allocated memory is still 205.5MB. Free memory was 169.9MB in the beginning and 169.0MB in the end (delta: 904.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:13:40,060 INFO L158 Benchmark]: RCFGBuilder took 615.98ms. Allocated memory is still 205.5MB. Free memory was 169.0MB in the beginning and 149.1MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-26 00:13:40,060 INFO L158 Benchmark]: TraceAbstraction took 433770.50ms. Allocated memory was 205.5MB in the beginning and 536.9MB in the end (delta: 331.4MB). Free memory was 149.1MB in the beginning and 345.6MB in the end (delta: -196.5MB). Peak memory consumption was 134.9MB. Max. memory is 16.1GB. [2022-11-26 00:13:40,060 INFO L158 Benchmark]: Witness Printer took 71.51ms. Allocated memory is still 536.9MB. Free memory was 345.6MB in the beginning and 342.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:13:40,061 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 136.3MB. Free memory was 109.1MB in the beginning and 108.9MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 675.92ms. Allocated memory was 136.3MB in the beginning and 205.5MB in the end (delta: 69.2MB). Free memory was 82.8MB in the beginning and 172.2MB in the end (delta: -89.3MB). Peak memory consumption was 25.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.27ms. Allocated memory is still 205.5MB. Free memory was 172.2MB in the beginning and 169.9MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.50ms. Allocated memory is still 205.5MB. Free memory was 169.9MB in the beginning and 169.0MB in the end (delta: 904.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 615.98ms. Allocated memory is still 205.5MB. Free memory was 169.0MB in the beginning and 149.1MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 433770.50ms. Allocated memory was 205.5MB in the beginning and 536.9MB in the end (delta: 331.4MB). Free memory was 149.1MB in the beginning and 345.6MB in the end (delta: -196.5MB). Peak memory consumption was 134.9MB. Max. memory is 16.1GB. * Witness Printer took 71.51ms. Allocated memory is still 536.9MB. Free memory was 345.6MB in the beginning and 342.4MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 609]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 597]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 433.7s, OverallIterations: 25, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 34.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2869 SdHoareTripleChecker+Valid, 9.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2869 mSDsluCounter, 1671 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 203 IncrementalHoareTripleChecker+Unchecked, 1331 mSDsCounter, 196 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5085 IncrementalHoareTripleChecker+Invalid, 5484 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 196 mSolverCounterUnsat, 340 mSDtfsCounter, 5085 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1156 GetRequests, 472 SyntacticMatches, 26 SemanticMatches, 658 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 10131 ImplicationChecksByTransitivity, 335.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=23, InterpolantAutomatonStates: 242, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 213 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 280.7s InterpolantComputationTime, 786 NumberOfCodeBlocks, 786 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 985 ConstructedInterpolants, 137 QuantifiedInterpolants, 19360 SizeOfPredicates, 215 NumberOfNonLiveVariables, 4305 ConjunctsInSsa, 562 ConjunctsInUnsatCore, 52 InterpolantComputations, 13 PerfectInterpolantSequences, 218/483 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 5.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 19, TOOLS_POST_TIME: 5.0s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 19, TOOLS_QUANTIFIERELIM_TIME: 5.0s, TOOLS_QUANTIFIERELIM_MAX_TIME: 1.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 32, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 2.9s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 2.9s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 92, DAG_COMPRESSION_RETAINED_NODES: 30, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 21 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-26 00:13:40,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_111ea5a2-b5d2-4336-a21a-98e281de76e0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE