./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS --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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- 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-8393723 [2022-11-19 07:59:47,018 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:59:47,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:59:47,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:59:47,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:59:47,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:59:47,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:59:47,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:59:47,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:59:47,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:59:47,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:59:47,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:59:47,077 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:59:47,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:59:47,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:59:47,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:59:47,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:59:47,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:59:47,088 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:59:47,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:59:47,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:59:47,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:59:47,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:59:47,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:59:47,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:59:47,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:59:47,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:59:47,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:59:47,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:59:47,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:59:47,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:59:47,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:59:47,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:59:47,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:59:47,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:59:47,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:59:47,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:59:47,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:59:47,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:59:47,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:59:47,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:59:47,124 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:59:47,177 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:59:47,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:59:47,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:59:47,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:59:47,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:59:47,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:59:47,179 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:59:47,180 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:59:47,180 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:59:47,180 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:59:47,181 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:59:47,182 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:59:47,182 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:59:47,182 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:59:47,182 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:59:47,183 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:59:47,183 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:59:47,183 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:59:47,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:59:47,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:59:47,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:59:47,185 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:59:47,185 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:59:47,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:59:47,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:59:47,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:59:47,186 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:59:47,186 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:59:47,186 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:59:47,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:59:47,187 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:59:47,187 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:59:47,187 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:59:47,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:59:47,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:59:47,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:59:47,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:59:47,189 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:59:47,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:59:47,189 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:59:47,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:59:47,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:59:47,190 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_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2022-11-19 07:59:47,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:59:47,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:59:47,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:59:47,505 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:59:47,506 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:59:47,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-11-19 07:59:47,576 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/data/2f23d334c/2594bb920dfb44fea2e3058a6d772ce4/FLAG0332c4359 [2022-11-19 07:59:48,065 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:59:48,066 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-11-19 07:59:48,073 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/data/2f23d334c/2594bb920dfb44fea2e3058a6d772ce4/FLAG0332c4359 [2022-11-19 07:59:48,440 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/data/2f23d334c/2594bb920dfb44fea2e3058a6d772ce4 [2022-11-19 07:59:48,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:59:48,444 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:59:48,446 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:59:48,446 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:59:48,450 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:59:48,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a5bbdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48, skipping insertion in model container [2022-11-19 07:59:48,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:59:48,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:59:48,676 WARN L234 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_8b08e2a2-b326-441d-97d3-6aa835fce11c/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-11-19 07:59:48,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:59:48,717 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:59:48,731 WARN L234 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_8b08e2a2-b326-441d-97d3-6aa835fce11c/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-11-19 07:59:48,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:59:48,760 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:59:48,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48 WrapperNode [2022-11-19 07:59:48,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:59:48,762 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:59:48,762 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:59:48,762 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:59:48,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,804 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2022-11-19 07:59:48,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:59:48,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:59:48,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:59:48,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:59:48,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,827 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,846 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:59:48,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:59:48,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:59:48,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:59:48,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (1/1) ... [2022-11-19 07:59:48,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:59:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:59:48,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:59:48,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:59:48,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:59:48,940 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:59:48,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:59:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:59:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:59:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:59:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:59:48,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:59:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:59:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 07:59:48,943 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 07:59:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:59:49,059 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:59:49,061 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:59:49,502 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:59:49,601 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:59:49,601 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-19 07:59:49,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:49 BoogieIcfgContainer [2022-11-19 07:59:49,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:59:49,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:59:49,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:59:49,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:59:49,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:48" (1/3) ... [2022-11-19 07:59:49,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4bd83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:49, skipping insertion in model container [2022-11-19 07:59:49,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:48" (2/3) ... [2022-11-19 07:59:49,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e4bd83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:49, skipping insertion in model container [2022-11-19 07:59:49,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:49" (3/3) ... [2022-11-19 07:59:49,624 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-11-19 07:59:49,644 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:59:49,644 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-19 07:59:49,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:59:49,731 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;@b3f8e43, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:59:49,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-11-19 07:59:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:59:49,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:59:49,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:49,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:59:49,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 07:59:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:49,756 INFO L85 PathProgramCache]: Analyzing trace with hash -400663964, now seen corresponding path program 1 times [2022-11-19 07:59:49,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:59:49,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009331721] [2022-11-19 07:59:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:49,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:59:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:59:50,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:59:50,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009331721] [2022-11-19 07:59:50,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009331721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:59:50,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:59:50,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:59:50,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506746294] [2022-11-19 07:59:50,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:59:50,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:59:50,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:59:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:59:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:59:50,371 INFO L87 Difference]: Start difference. First operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:59:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:50,518 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-11-19 07:59:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:59:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2022-11-19 07:59:50,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:50,530 INFO L225 Difference]: With dead ends: 76 [2022-11-19 07:59:50,531 INFO L226 Difference]: Without dead ends: 75 [2022-11-19 07:59:50,533 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 [2022-11-19 07:59:50,540 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 116 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:50,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 63 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:59:50,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-19 07:59:50,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-19 07:59:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 2.027027027027027) internal successors, (75), 68 states have internal predecessors, (75), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:59:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2022-11-19 07:59:50,584 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 20 [2022-11-19 07:59:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:50,586 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2022-11-19 07:59:50,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:59:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2022-11-19 07:59:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:59:50,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:50,589 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:59:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:59:50,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 07:59:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:50,592 INFO L85 PathProgramCache]: Analyzing trace with hash -400663963, now seen corresponding path program 1 times [2022-11-19 07:59:50,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:59:50,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916006862] [2022-11-19 07:59:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:50,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:59:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:59:51,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:59:51,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916006862] [2022-11-19 07:59:51,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916006862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:59:51,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:59:51,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:59:51,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849035562] [2022-11-19 07:59:51,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:59:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:59:51,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:59:51,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:59:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:59:51,566 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:59:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:52,764 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2022-11-19 07:59:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:59:52,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2022-11-19 07:59:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:52,768 INFO L225 Difference]: With dead ends: 201 [2022-11-19 07:59:52,768 INFO L226 Difference]: Without dead ends: 201 [2022-11-19 07:59:52,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:59:52,770 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 601 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:52,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 195 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:59:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-19 07:59:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 106. [2022-11-19 07:59:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 96 states have internal predecessors, (137), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 07:59:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 151 transitions. [2022-11-19 07:59:52,783 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 151 transitions. Word has length 20 [2022-11-19 07:59:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:52,783 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 151 transitions. [2022-11-19 07:59:52,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:59:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 151 transitions. [2022-11-19 07:59:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:59:52,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:52,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:59:52,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:59:52,786 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 07:59:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:52,787 INFO L85 PathProgramCache]: Analyzing trace with hash -529353396, now seen corresponding path program 1 times [2022-11-19 07:59:52,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:59:52,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698324261] [2022-11-19 07:59:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:52,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:59:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:59:53,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:59:53,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698324261] [2022-11-19 07:59:53,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698324261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:59:53,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321602388] [2022-11-19 07:59:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:53,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:59:53,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:59:53,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:59:53,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:59:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:53,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:59:53,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:53,705 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 [2022-11-19 07:59:53,723 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 [2022-11-19 07:59:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:54,119 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 16 treesize of output 18 [2022-11-19 07:59:54,135 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:59:54,135 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 [2022-11-19 07:59:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:59:54,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:54,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321602388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:59:54,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695865571] [2022-11-19 07:59:54,834 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 07:59:54,834 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:59:54,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:59:54,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:59:54,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:59:55,224 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 10 treesize of output 9 [2022-11-19 07:59:55,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:59:55,294 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 7 treesize of output 6 [2022-11-19 07:59:55,442 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 07:59:55,442 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 07:59:55,478 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:59:55,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 07:59:55,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 07:59:55,637 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:59:55,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 07:59:55,848 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:59:56,118 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 07:59:56,153 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 07:59:56,155 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:59:59,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (= ((as const (Array Int Int)) 0) (select |#memory_int| |ULTIMATE.start_main_#t~malloc16#1.base|)) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_main_~i~1#1| 0) (< |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_main_#t~malloc16#1.base|) (= (* (mod |ULTIMATE.start_main_~n~0#1| 1073741824) 4) (select |#length| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= (select |#valid| |ULTIMATE.start_main_#t~malloc16#1.base|) 1) (< |ULTIMATE.start_main_#t~malloc15#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_#t~malloc15#1.base|) (= |ULTIMATE.start_main_~a0~0#1.offset| |ULTIMATE.start_main_#t~malloc16#1.offset|) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_main_#t~malloc15#1.offset|) (< |ULTIMATE.start_main_#t~malloc16#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_is_pow2_#res#1| 0)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= (select |#valid| |ULTIMATE.start_main_#t~malloc15#1.base|) 1) (not (= |ULTIMATE.start_main_#t~malloc16#1.base| 0)) (= (* (mod |ULTIMATE.start_main_~n~0#1| 1073741824) 4) (select |#length| |ULTIMATE.start_main_#t~malloc16#1.base|)) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (= (ite (= (mod |ULTIMATE.start_is_pow2_~x#1| 4294967296) 1) 1 0) |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (= |ULTIMATE.start_main_#t~malloc15#1.base| 0)) (not (= |ULTIMATE.start_main_#t~malloc16#1.base| |ULTIMATE.start_main_#t~malloc15#1.base|)) (= |#NULL.base| 0))' at error location [2022-11-19 07:59:59,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:59:59,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:59:59,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2022-11-19 07:59:59,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832402080] [2022-11-19 07:59:59,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:59:59,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:59:59,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:59:59,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:59:59,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:59:59,612 INFO L87 Difference]: Start difference. First operand 106 states and 151 transitions. Second operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-19 08:00:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:00,926 INFO L93 Difference]: Finished difference Result 207 states and 228 transitions. [2022-11-19 08:00:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:00:00,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 21 [2022-11-19 08:00:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:00,928 INFO L225 Difference]: With dead ends: 207 [2022-11-19 08:00:00,929 INFO L226 Difference]: Without dead ends: 207 [2022-11-19 08:00:00,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:00:00,931 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 829 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:00,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 548 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 856 Invalid, 0 Unknown, 126 Unchecked, 0.9s Time] [2022-11-19 08:00:00,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-19 08:00:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 86. [2022-11-19 08:00:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 75 states have internal predecessors, (84), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-11-19 08:00:00,951 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 21 [2022-11-19 08:00:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:00,952 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-11-19 08:00:00,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-19 08:00:00,952 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-11-19 08:00:00,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:00:00,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:00,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:00,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:01,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:01,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:01,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:01,161 INFO L85 PathProgramCache]: Analyzing trace with hash 464319011, now seen corresponding path program 1 times [2022-11-19 08:00:01,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:01,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987731373] [2022-11-19 08:00:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:01,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:01,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:01,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987731373] [2022-11-19 08:00:01,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987731373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:01,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:01,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:01,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822533656] [2022-11-19 08:00:01,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:01,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:00:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:00:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:01,213 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 08:00:01,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:01,291 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-11-19 08:00:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:00:01,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2022-11-19 08:00:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:01,293 INFO L225 Difference]: With dead ends: 85 [2022-11-19 08:00:01,293 INFO L226 Difference]: Without dead ends: 85 [2022-11-19 08:00:01,293 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 [2022-11-19 08:00:01,294 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:01,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 66 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:00:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-19 08:00:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-19 08:00:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 45 states have (on average 1.8444444444444446) internal successors, (83), 74 states have internal predecessors, (83), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2022-11-19 08:00:01,316 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 21 [2022-11-19 08:00:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:01,316 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2022-11-19 08:00:01,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 08:00:01,317 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2022-11-19 08:00:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:00:01,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:01,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:01,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:00:01,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:01,325 INFO L85 PathProgramCache]: Analyzing trace with hash 464319012, now seen corresponding path program 1 times [2022-11-19 08:00:01,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:01,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891551044] [2022-11-19 08:00:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:01,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:01,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:01,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891551044] [2022-11-19 08:00:01,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891551044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:01,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:01,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:00:01,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535507342] [2022-11-19 08:00:01,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:01,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:00:01,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:00:01,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:00:01,577 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:00:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:02,021 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2022-11-19 08:00:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:00:02,022 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-19 08:00:02,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:02,023 INFO L225 Difference]: With dead ends: 139 [2022-11-19 08:00:02,023 INFO L226 Difference]: Without dead ends: 139 [2022-11-19 08:00:02,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:00:02,024 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 356 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:02,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 63 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:00:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-19 08:00:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 108. [2022-11-19 08:00:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 97 states have internal predecessors, (135), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 149 transitions. [2022-11-19 08:00:02,033 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 149 transitions. Word has length 21 [2022-11-19 08:00:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:02,034 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 149 transitions. [2022-11-19 08:00:02,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:00:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 149 transitions. [2022-11-19 08:00:02,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:00:02,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:02,036 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:02,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:00:02,036 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:02,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:02,038 INFO L85 PathProgramCache]: Analyzing trace with hash 464496812, now seen corresponding path program 1 times [2022-11-19 08:00:02,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:02,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646232622] [2022-11-19 08:00:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:02,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:02,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:02,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646232622] [2022-11-19 08:00:02,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646232622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:02,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:02,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:00:02,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423437063] [2022-11-19 08:00:02,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:02,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:00:02,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:02,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:00:02,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:00:02,137 INFO L87 Difference]: Start difference. First operand 108 states and 149 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:00:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:02,270 INFO L93 Difference]: Finished difference Result 102 states and 137 transitions. [2022-11-19 08:00:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:00:02,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-19 08:00:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:02,272 INFO L225 Difference]: With dead ends: 102 [2022-11-19 08:00:02,272 INFO L226 Difference]: Without dead ends: 102 [2022-11-19 08:00:02,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:00:02,273 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 131 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:02,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 74 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:00:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-19 08:00:02,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-19 08:00:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 91 states have internal predecessors, (123), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 137 transitions. [2022-11-19 08:00:02,284 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 137 transitions. Word has length 21 [2022-11-19 08:00:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:02,285 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 137 transitions. [2022-11-19 08:00:02,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:00:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 137 transitions. [2022-11-19 08:00:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:00:02,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:02,286 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:02,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:00:02,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:02,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:02,287 INFO L85 PathProgramCache]: Analyzing trace with hash 464496813, now seen corresponding path program 1 times [2022-11-19 08:00:02,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:02,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642142832] [2022-11-19 08:00:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:00:02,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:02,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642142832] [2022-11-19 08:00:02,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642142832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:02,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:02,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 08:00:02,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112071996] [2022-11-19 08:00:02,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:02,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:00:02,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:02,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:00:02,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:00:02,470 INFO L87 Difference]: Start difference. First operand 102 states and 137 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:00:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:02,672 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2022-11-19 08:00:02,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:00:02,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-19 08:00:02,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:02,674 INFO L225 Difference]: With dead ends: 135 [2022-11-19 08:00:02,674 INFO L226 Difference]: Without dead ends: 135 [2022-11-19 08:00:02,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:00:02,675 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 256 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:02,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 226 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:00:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-19 08:00:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 72. [2022-11-19 08:00:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 64 states have internal predecessors, (71), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:00:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-11-19 08:00:02,688 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 21 [2022-11-19 08:00:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:02,688 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-11-19 08:00:02,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:00:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-11-19 08:00:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:00:02,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:02,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:02,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:00:02,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:02,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:02,696 INFO L85 PathProgramCache]: Analyzing trace with hash -465867667, now seen corresponding path program 1 times [2022-11-19 08:00:02,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:02,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721872374] [2022-11-19 08:00:02,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:02,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:00:02,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:02,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721872374] [2022-11-19 08:00:02,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721872374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:02,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722429624] [2022-11-19 08:00:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:02,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:02,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:02,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:02,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:00:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:03,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:00:03,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:03,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:03,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722429624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:03,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:00:03,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2022-11-19 08:00:03,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848529141] [2022-11-19 08:00:03,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:03,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:00:03,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:03,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:00:03,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:00:03,261 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:00:03,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:03,609 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2022-11-19 08:00:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:00:03,610 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-11-19 08:00:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:03,611 INFO L225 Difference]: With dead ends: 131 [2022-11-19 08:00:03,611 INFO L226 Difference]: Without dead ends: 131 [2022-11-19 08:00:03,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:00:03,612 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 237 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:03,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 269 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:00:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-19 08:00:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 83. [2022-11-19 08:00:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 72 states have internal predecessors, (80), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-11-19 08:00:03,625 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 23 [2022-11-19 08:00:03,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:03,625 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-11-19 08:00:03,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:00:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-11-19 08:00:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:00:03,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:03,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:03,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:03,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:03,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:03,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:03,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1153029158, now seen corresponding path program 1 times [2022-11-19 08:00:03,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:03,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525757280] [2022-11-19 08:00:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:03,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:04,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525757280] [2022-11-19 08:00:04,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525757280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:04,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650890970] [2022-11-19 08:00:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:04,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:04,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:04,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:04,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:00:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:04,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 08:00:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:04,515 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 [2022-11-19 08:00:04,525 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 [2022-11-19 08:00:04,731 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:00:04,731 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 16 treesize of output 22 [2022-11-19 08:00:04,747 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:00:04,748 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 [2022-11-19 08:00:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:00:06,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:07,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650890970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [106321185] [2022-11-19 08:00:07,847 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 08:00:07,847 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:07,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:07,848 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:07,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:08,091 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 10 treesize of output 9 [2022-11-19 08:00:08,105 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 [2022-11-19 08:00:08,150 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 7 treesize of output 6 [2022-11-19 08:00:08,255 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:00:08,255 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:00:08,286 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:00:08,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:00:08,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:08,415 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:08,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:08,591 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:08,702 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:00:08,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-19 08:00:08,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:00:08,788 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:00:08,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:00:08,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:00:08,828 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:00:08,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:00:09,021 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:00:09,059 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:00:09,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:12,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2306#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:00:12,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:12,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:12,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2022-11-19 08:00:12,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212384153] [2022-11-19 08:00:12,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:12,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:00:12,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:12,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:00:12,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1525, Unknown=3, NotChecked=0, Total=1722 [2022-11-19 08:00:12,441 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-19 08:00:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:13,768 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2022-11-19 08:00:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 08:00:13,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 24 [2022-11-19 08:00:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:13,770 INFO L225 Difference]: With dead ends: 135 [2022-11-19 08:00:13,770 INFO L226 Difference]: Without dead ends: 135 [2022-11-19 08:00:13,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=318, Invalid=2435, Unknown=3, NotChecked=0, Total=2756 [2022-11-19 08:00:13,775 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 387 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:13,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 364 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 746 Invalid, 0 Unknown, 128 Unchecked, 0.7s Time] [2022-11-19 08:00:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-19 08:00:13,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 85. [2022-11-19 08:00:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.607843137254902) internal successors, (82), 74 states have internal predecessors, (82), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2022-11-19 08:00:13,782 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 24 [2022-11-19 08:00:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:13,782 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2022-11-19 08:00:13,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-19 08:00:13,782 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2022-11-19 08:00:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:00:13,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:13,783 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:13,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 08:00:13,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 08:00:13,989 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:13,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:13,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1556818011, now seen corresponding path program 1 times [2022-11-19 08:00:13,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:13,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023056144] [2022-11-19 08:00:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:13,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:14,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:14,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023056144] [2022-11-19 08:00:14,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023056144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:14,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114331022] [2022-11-19 08:00:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:14,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:14,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:14,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:14,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:00:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:14,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:00:14,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:14,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:14,688 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 29 treesize of output 25 [2022-11-19 08:00:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:14,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114331022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:14,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811072733] [2022-11-19 08:00:14,817 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 08:00:14,818 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:14,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:14,818 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:14,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:15,062 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-19 08:00:15,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-19 08:00:15,217 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:15,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:15,332 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 7 treesize of output 6 [2022-11-19 08:00:15,465 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:15,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:15,742 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-19 08:00:15,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-19 08:00:15,957 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:15,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:00:16,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:16,219 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:16,383 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:16,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:00:16,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:16,661 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:16,865 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:00:16,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-19 08:00:17,053 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:00:17,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-19 08:00:17,314 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:17,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:00:17,604 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:17,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:17,754 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-19 08:00:17,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-19 08:00:17,761 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:00:17,763 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:22,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2731#(and (not (< |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|)) (= |ULTIMATE.start_downsweep_~a#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_upsweep_~a#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_#in~a#1.offset| |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_downsweep_#in~a#1.offset|) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_downsweep_~space#1|) (<= |ULTIMATE.start_is_pow2_~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (or (not (<= 4 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~n#1| 4)))) (not (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~n#1| 4)) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|)))) (= |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_#res#1|) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_upsweep_#res#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (<= |ULTIMATE.start_main_~i~1#1| 1) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_is_pow2_~x#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~space#1| |ULTIMATE.start_main_~space~1#1|) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-19 08:00:22,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:22,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:00:22,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-11-19 08:00:22,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676578970] [2022-11-19 08:00:22,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:22,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 08:00:22,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:22,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 08:00:22,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:00:22,226 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:00:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:23,201 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2022-11-19 08:00:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 08:00:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 24 [2022-11-19 08:00:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:23,203 INFO L225 Difference]: With dead ends: 131 [2022-11-19 08:00:23,203 INFO L226 Difference]: Without dead ends: 131 [2022-11-19 08:00:23,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 08:00:23,204 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1246 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1247 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:23,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1247 Valid, 217 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:00:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-19 08:00:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 84. [2022-11-19 08:00:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.588235294117647) internal successors, (81), 73 states have internal predecessors, (81), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-11-19 08:00:23,209 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 24 [2022-11-19 08:00:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:23,209 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-11-19 08:00:23,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:00:23,210 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-11-19 08:00:23,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:00:23,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:23,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:23,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 08:00:23,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:23,411 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1384165507, now seen corresponding path program 1 times [2022-11-19 08:00:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:23,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822329504] [2022-11-19 08:00:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:00:23,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:23,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822329504] [2022-11-19 08:00:23,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822329504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:23,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646372643] [2022-11-19 08:00:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:23,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:23,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:23,750 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:23,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:00:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:23,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:00:23,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:23,831 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 [2022-11-19 08:00:23,962 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:00:23,963 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 18 treesize of output 20 [2022-11-19 08:00:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:00:24,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:24,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646372643] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:24,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371298582] [2022-11-19 08:00:24,753 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 08:00:24,753 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:24,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:24,753 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:24,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:25,098 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 [2022-11-19 08:00:25,104 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 10 treesize of output 9 [2022-11-19 08:00:25,139 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 7 treesize of output 6 [2022-11-19 08:00:25,239 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:00:25,240 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:00:25,268 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:00:25,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:00:25,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:25,407 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:25,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:25,504 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:25,638 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:00:25,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-19 08:00:25,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:00:25,723 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:00:25,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:00:25,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:00:25,765 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:00:25,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:00:25,890 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:00:25,918 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:00:25,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:28,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3126#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~a0~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~a0~0#1.base|))) (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4))) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:00:28,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:28,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:28,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-19 08:00:28,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896307121] [2022-11-19 08:00:28,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:28,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:00:28,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:00:28,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 08:00:28,510 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:00:29,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:29,114 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2022-11-19 08:00:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:00:29,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 25 [2022-11-19 08:00:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:29,115 INFO L225 Difference]: With dead ends: 131 [2022-11-19 08:00:29,115 INFO L226 Difference]: Without dead ends: 131 [2022-11-19 08:00:29,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 08:00:29,116 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 167 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:29,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 206 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 455 Invalid, 0 Unknown, 39 Unchecked, 0.5s Time] [2022-11-19 08:00:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-19 08:00:29,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 107. [2022-11-19 08:00:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 96 states have internal predecessors, (126), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:29,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2022-11-19 08:00:29,122 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 25 [2022-11-19 08:00:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:29,124 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2022-11-19 08:00:29,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:00:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2022-11-19 08:00:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:00:29,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:29,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:29,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:29,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:29,337 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1016877298, now seen corresponding path program 1 times [2022-11-19 08:00:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:29,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219952048] [2022-11-19 08:00:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:29,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:29,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219952048] [2022-11-19 08:00:29,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219952048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:29,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:29,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:29,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198467773] [2022-11-19 08:00:29,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:29,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:00:29,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:29,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:00:29,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:29,397 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:00:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:29,470 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2022-11-19 08:00:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:00:29,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2022-11-19 08:00:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:29,472 INFO L225 Difference]: With dead ends: 104 [2022-11-19 08:00:29,472 INFO L226 Difference]: Without dead ends: 104 [2022-11-19 08:00:29,472 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 [2022-11-19 08:00:29,473 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 82 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:29,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 75 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:00:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-19 08:00:29,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-11-19 08:00:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 74 states have (on average 1.6216216216216217) internal successors, (120), 93 states have internal predecessors, (120), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:29,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 134 transitions. [2022-11-19 08:00:29,478 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 134 transitions. Word has length 25 [2022-11-19 08:00:29,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:29,479 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 134 transitions. [2022-11-19 08:00:29,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:00:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 134 transitions. [2022-11-19 08:00:29,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:00:29,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:29,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:29,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:00:29,481 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:29,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:29,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1016877297, now seen corresponding path program 1 times [2022-11-19 08:00:29,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:29,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877427342] [2022-11-19 08:00:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:29,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:29,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877427342] [2022-11-19 08:00:29,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877427342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:29,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579597835] [2022-11-19 08:00:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:29,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:29,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:29,591 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:29,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:00:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:29,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:00:29,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:29,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:29,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579597835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:29,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409294784] [2022-11-19 08:00:29,734 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 08:00:29,735 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:29,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:29,736 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:29,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:29,926 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-19 08:00:29,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-19 08:00:30,067 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:30,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:30,161 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 7 treesize of output 6 [2022-11-19 08:00:30,274 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:30,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:30,528 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-19 08:00:30,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-19 08:00:30,727 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:30,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:00:30,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:30,967 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:31,121 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:31,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:00:31,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:31,380 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:31,568 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:00:31,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-19 08:00:31,742 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-19 08:00:31,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 336 [2022-11-19 08:00:31,989 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:31,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:00:32,253 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:32,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:32,399 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-19 08:00:32,406 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 7 treesize of output 6 [2022-11-19 08:00:32,407 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:00:32,410 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:35,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [409294784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:35,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:00:35,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 5, 5] total 26 [2022-11-19 08:00:35,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643593972] [2022-11-19 08:00:35,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:35,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:00:35,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:35,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:00:35,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:00:35,834 INFO L87 Difference]: Start difference. First operand 104 states and 134 transitions. Second operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:00:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:36,659 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2022-11-19 08:00:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 08:00:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-11-19 08:00:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:36,661 INFO L225 Difference]: With dead ends: 122 [2022-11-19 08:00:36,661 INFO L226 Difference]: Without dead ends: 122 [2022-11-19 08:00:36,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:00:36,662 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 160 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:36,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 178 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:00:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-19 08:00:36,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 104. [2022-11-19 08:00:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.5694444444444444) internal successors, (113), 91 states have internal predecessors, (113), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-11-19 08:00:36,667 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 25 [2022-11-19 08:00:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:36,667 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-11-19 08:00:36,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:00:36,668 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-11-19 08:00:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:00:36,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:36,668 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:36,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:36,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:00:36,874 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:36,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1256648948, now seen corresponding path program 2 times [2022-11-19 08:00:36,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:36,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501713894] [2022-11-19 08:00:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:36,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:37,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:37,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501713894] [2022-11-19 08:00:37,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501713894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:37,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443997442] [2022-11-19 08:00:37,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:00:37,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:37,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:37,405 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:37,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:00:37,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:00:37,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:00:37,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 08:00:37,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:37,570 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 [2022-11-19 08:00:37,580 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 [2022-11-19 08:00:37,764 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:00:37,765 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 16 treesize of output 22 [2022-11-19 08:00:37,782 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:00:37,782 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 [2022-11-19 08:00:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:38,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:39,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443997442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:39,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1902945831] [2022-11-19 08:00:39,073 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 08:00:39,074 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:39,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:39,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:39,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:39,276 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 10 treesize of output 9 [2022-11-19 08:00:39,289 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 [2022-11-19 08:00:39,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-19 08:00:39,431 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:00:39,432 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:00:39,459 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:00:39,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:00:39,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:39,589 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:39,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:39,689 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:39,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:00:39,882 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:00:39,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-11-19 08:00:39,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:00:40,001 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:00:40,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:00:40,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:00:40,037 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:00:40,037 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 25 treesize of output 25 [2022-11-19 08:00:40,192 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:00:40,220 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:00:40,222 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:43,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4142#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:00:43,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:00:43,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:00:43,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2022-11-19 08:00:43,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030639632] [2022-11-19 08:00:43,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:43,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 08:00:43,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 08:00:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1529, Unknown=2, NotChecked=0, Total=1722 [2022-11-19 08:00:43,931 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-19 08:00:44,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:44,876 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2022-11-19 08:00:44,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:00:44,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 27 [2022-11-19 08:00:44,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:44,878 INFO L225 Difference]: With dead ends: 121 [2022-11-19 08:00:44,878 INFO L226 Difference]: Without dead ends: 121 [2022-11-19 08:00:44,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=303, Invalid=2047, Unknown=2, NotChecked=0, Total=2352 [2022-11-19 08:00:44,879 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 272 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:44,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 247 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 583 Invalid, 0 Unknown, 61 Unchecked, 0.5s Time] [2022-11-19 08:00:44,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-19 08:00:44,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2022-11-19 08:00:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.5555555555555556) internal successors, (112), 90 states have internal predecessors, (112), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-11-19 08:00:44,884 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 27 [2022-11-19 08:00:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:44,884 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-11-19 08:00:44,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-19 08:00:44,885 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-11-19 08:00:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:00:44,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:44,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:44,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:45,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:45,091 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2104618557, now seen corresponding path program 1 times [2022-11-19 08:00:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:45,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652149526] [2022-11-19 08:00:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:00:45,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:45,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652149526] [2022-11-19 08:00:45,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652149526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:45,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:45,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:00:45,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141702109] [2022-11-19 08:00:45,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:45,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:00:45,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:45,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:00:45,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:00:45,182 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:00:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:45,273 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2022-11-19 08:00:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:00:45,273 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2022-11-19 08:00:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:45,274 INFO L225 Difference]: With dead ends: 102 [2022-11-19 08:00:45,274 INFO L226 Difference]: Without dead ends: 102 [2022-11-19 08:00:45,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:00:45,275 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 92 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:45,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 99 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:00:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-19 08:00:45,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-19 08:00:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.5277777777777777) internal successors, (110), 89 states have internal predecessors, (110), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2022-11-19 08:00:45,279 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 27 [2022-11-19 08:00:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:45,280 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2022-11-19 08:00:45,280 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:00:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2022-11-19 08:00:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:00:45,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:45,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:45,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:00:45,281 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:45,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:45,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2104618556, now seen corresponding path program 1 times [2022-11-19 08:00:45,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:45,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454201274] [2022-11-19 08:00:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:45,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:45,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:45,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454201274] [2022-11-19 08:00:45,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454201274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:45,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764370907] [2022-11-19 08:00:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:45,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:45,550 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:45,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:00:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:45,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:00:45,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:45,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:45,792 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 23 treesize of output 19 [2022-11-19 08:00:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:45,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764370907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:45,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724550376] [2022-11-19 08:00:45,845 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:00:45,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:45,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:45,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:45,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:46,024 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-19 08:00:46,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-19 08:00:46,158 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:46,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:46,261 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 7 treesize of output 6 [2022-11-19 08:00:46,378 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:46,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:46,649 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-19 08:00:46,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-19 08:00:46,826 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:46,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:00:47,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:47,072 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:47,224 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:47,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:00:47,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:47,478 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:47,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:47,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:00:47,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:47,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:00:47,988 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-19 08:00:47,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 488 treesize of output 484 [2022-11-19 08:00:48,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:00:48,011 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 483 treesize of output 475 [2022-11-19 08:00:48,705 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:48,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:00:48,973 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:48,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:49,110 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-19 08:00:49,116 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 7 treesize of output 6 [2022-11-19 08:00:49,118 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:00:49,119 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:00:57,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [724550376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:57,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:00:57,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [10, 6, 6] total 36 [2022-11-19 08:00:57,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671989172] [2022-11-19 08:00:57,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:57,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:00:57,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:00:57,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:00:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 08:00:57,079 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:00:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:58,038 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2022-11-19 08:00:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:00:58,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2022-11-19 08:00:58,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:58,040 INFO L225 Difference]: With dead ends: 106 [2022-11-19 08:00:58,040 INFO L226 Difference]: Without dead ends: 106 [2022-11-19 08:00:58,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 08:00:58,041 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 45 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:58,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 198 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 548 Invalid, 0 Unknown, 83 Unchecked, 0.9s Time] [2022-11-19 08:00:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-19 08:00:58,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-11-19 08:00:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 75 states have (on average 1.5333333333333334) internal successors, (115), 92 states have internal predecessors, (115), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:00:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2022-11-19 08:00:58,046 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 27 [2022-11-19 08:00:58,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:58,046 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2022-11-19 08:00:58,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:00:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2022-11-19 08:00:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 08:00:58,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:58,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:58,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 08:00:58,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 08:00:58,253 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:00:58,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash -2104744574, now seen corresponding path program 1 times [2022-11-19 08:00:58,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:00:58,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437572400] [2022-11-19 08:00:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:58,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:00:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:58,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:00:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437572400] [2022-11-19 08:00:58,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437572400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:00:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20808493] [2022-11-19 08:00:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:58,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:58,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:58,403 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:58,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:00:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:58,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:00:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:58,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:00:58,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20808493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:58,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305642924] [2022-11-19 08:00:58,585 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:00:58,585 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:00:58,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:00:58,586 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:00:58,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:00:58,751 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-19 08:00:58,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-19 08:00:58,870 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:58,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:58,980 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 7 treesize of output 6 [2022-11-19 08:00:59,090 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:00:59,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:00:59,332 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-19 08:00:59,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-19 08:00:59,514 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:59,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:00:59,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:00:59,755 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:00:59,903 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:00:59,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:01:00,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:01:00,138 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:01:00,347 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:01:00,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-19 08:01:00,488 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-19 08:01:00,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 336 [2022-11-19 08:01:00,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:01:00,782 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:01:00,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:01:01,020 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:01:01,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:01:01,159 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-19 08:01:01,165 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 7 treesize of output 6 [2022-11-19 08:01:01,167 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:01:01,168 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:01:05,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [305642924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:05,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:01:05,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 7, 7] total 29 [2022-11-19 08:01:05,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103614072] [2022-11-19 08:01:05,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:05,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:01:05,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:05,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:01:05,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:01:05,192 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:01:06,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:06,385 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2022-11-19 08:01:06,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 08:01:06,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2022-11-19 08:01:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:06,387 INFO L225 Difference]: With dead ends: 110 [2022-11-19 08:01:06,387 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 08:01:06,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:01:06,388 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 134 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:06,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 217 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 08:01:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 08:01:06,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2022-11-19 08:01:06,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 68 states have (on average 1.4705882352941178) internal successors, (100), 85 states have internal predecessors, (100), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:01:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2022-11-19 08:01:06,394 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 27 [2022-11-19 08:01:06,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:06,394 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2022-11-19 08:01:06,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:01:06,395 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2022-11-19 08:01:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:01:06,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:06,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:06,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:06,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 08:01:06,601 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:01:06,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:06,602 INFO L85 PathProgramCache]: Analyzing trace with hash -301411747, now seen corresponding path program 2 times [2022-11-19 08:01:06,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:06,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473816285] [2022-11-19 08:01:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:06,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:06,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:01:06,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:06,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473816285] [2022-11-19 08:01:06,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473816285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:06,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786170067] [2022-11-19 08:01:06,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:01:06,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:06,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:06,962 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:06,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:01:07,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:01:07,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:01:07,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:01:07,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:07,065 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 [2022-11-19 08:01:07,070 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 [2022-11-19 08:01:07,174 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:01:07,175 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 18 treesize of output 24 [2022-11-19 08:01:07,204 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:01:07,204 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 [2022-11-19 08:01:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:01:07,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:07,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786170067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:07,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [276970888] [2022-11-19 08:01:07,923 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 08:01:07,923 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:01:07,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:01:07,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:01:07,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:01:08,152 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 10 treesize of output 9 [2022-11-19 08:01:08,159 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 [2022-11-19 08:01:08,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-19 08:01:08,290 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:01:08,290 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:01:08,321 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:01:08,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:01:08,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:01:08,420 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:01:08,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:01:08,513 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:01:08,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-19 08:01:08,692 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:01:08,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-11-19 08:01:08,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:01:08,786 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:01:08,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:01:08,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:01:08,827 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:01:08,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:01:08,951 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:01:08,976 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:01:08,977 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:01:13,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5554#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~a0~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~a0~0#1.base|))) (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_#t~mem18#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4))) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:01:13,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:01:13,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:01:13,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-19 08:01:13,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18811791] [2022-11-19 08:01:13,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:13,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 08:01:13,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:13,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 08:01:13,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1228, Unknown=1, NotChecked=0, Total=1406 [2022-11-19 08:01:13,816 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:01:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:14,709 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2022-11-19 08:01:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:01:14,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-11-19 08:01:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:14,711 INFO L225 Difference]: With dead ends: 108 [2022-11-19 08:01:14,711 INFO L226 Difference]: Without dead ends: 108 [2022-11-19 08:01:14,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=247, Invalid=1644, Unknown=1, NotChecked=0, Total=1892 [2022-11-19 08:01:14,712 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 331 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:14,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 171 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 357 Invalid, 0 Unknown, 146 Unchecked, 0.4s Time] [2022-11-19 08:01:14,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-19 08:01:14,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2022-11-19 08:01:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 72 states have internal predecessors, (81), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:01:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2022-11-19 08:01:14,716 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 28 [2022-11-19 08:01:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:14,717 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2022-11-19 08:01:14,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 5 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:01:14,717 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2022-11-19 08:01:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 08:01:14,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:14,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:14,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:14,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:01:14,921 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:01:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:14,921 INFO L85 PathProgramCache]: Analyzing trace with hash -818579421, now seen corresponding path program 1 times [2022-11-19 08:01:14,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:14,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302049088] [2022-11-19 08:01:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:14,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:01:15,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302049088] [2022-11-19 08:01:15,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302049088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:15,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145463370] [2022-11-19 08:01:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:15,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:15,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:15,071 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:15,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:01:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:15,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:01:15,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:01:15,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:01:15,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145463370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:15,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130992846] [2022-11-19 08:01:15,276 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-19 08:01:15,276 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:01:15,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:01:15,277 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:01:15,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:01:15,455 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-19 08:01:15,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-19 08:01:15,578 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:01:15,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:01:15,685 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 7 treesize of output 6 [2022-11-19 08:01:15,787 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:01:15,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:01:16,036 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-19 08:01:16,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-19 08:01:16,203 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:01:16,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:01:16,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:01:16,440 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:01:16,577 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:01:16,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:01:16,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:01:16,814 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:01:16,956 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:01:16,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-19 08:01:17,096 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:01:17,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-19 08:01:17,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:01:17,356 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:01:17,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:01:17,581 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:01:17,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:01:17,712 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-19 08:01:17,718 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 7 treesize of output 6 [2022-11-19 08:01:17,719 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:01:17,720 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:01:22,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2130992846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:22,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:01:22,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [7, 5, 5] total 30 [2022-11-19 08:01:22,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283634758] [2022-11-19 08:01:22,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:22,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:01:22,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:22,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:01:22,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:01:22,340 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:01:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:23,500 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2022-11-19 08:01:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:01:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-11-19 08:01:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:23,501 INFO L225 Difference]: With dead ends: 113 [2022-11-19 08:01:23,501 INFO L226 Difference]: Without dead ends: 113 [2022-11-19 08:01:23,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:01:23,502 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 168 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:23,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 223 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:01:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-19 08:01:23,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 85. [2022-11-19 08:01:23,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 72 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:01:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-11-19 08:01:23,506 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 28 [2022-11-19 08:01:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:23,507 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-11-19 08:01:23,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:01:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-11-19 08:01:23,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:01:23,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:23,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:23,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:23,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:23,713 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:01:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:23,714 INFO L85 PathProgramCache]: Analyzing trace with hash -748476946, now seen corresponding path program 1 times [2022-11-19 08:01:23,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:23,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702384520] [2022-11-19 08:01:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:23,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:01:23,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:23,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702384520] [2022-11-19 08:01:23,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702384520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:23,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888777941] [2022-11-19 08:01:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:23,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:23,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:23,928 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:23,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:01:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:24,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:01:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:01:24,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:24,241 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 23 treesize of output 19 [2022-11-19 08:01:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:01:24,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888777941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1083515298] [2022-11-19 08:01:24,314 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 08:01:24,314 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:01:24,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:01:24,315 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:01:24,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:01:24,605 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 [2022-11-19 08:01:24,611 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 10 treesize of output 9 [2022-11-19 08:01:24,643 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 7 treesize of output 6 [2022-11-19 08:01:24,734 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:01:24,734 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:01:24,770 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:01:24,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:01:24,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:01:24,879 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:01:24,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:01:24,981 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:01:25,076 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-19 08:01:25,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-19 08:01:25,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:01:25,156 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:01:25,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:01:25,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:01:25,212 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:01:25,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:01:25,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:01:25,258 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:01:25,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:01:25,434 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:01:25,459 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:01:25,460 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:01:28,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6356#(and (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (not (< |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|)) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_upsweep_~a#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_#in~a#1.offset| |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_#in~n#1|) (= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~space~0#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_upsweep_#in~a#1.offset|) (< |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:01:28,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:01:28,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:01:28,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-11-19 08:01:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21417721] [2022-11-19 08:01:28,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:28,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:01:28,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:01:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:01:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 08:01:28,538 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:01:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:29,353 INFO L93 Difference]: Finished difference Result 269 states and 294 transitions. [2022-11-19 08:01:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:01:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-11-19 08:01:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:29,355 INFO L225 Difference]: With dead ends: 269 [2022-11-19 08:01:29,355 INFO L226 Difference]: Without dead ends: 269 [2022-11-19 08:01:29,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=462, Invalid=2400, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 08:01:29,356 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 2113 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2113 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:29,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2113 Valid, 263 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:01:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-19 08:01:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 95. [2022-11-19 08:01:29,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.462686567164179) internal successors, (98), 82 states have internal predecessors, (98), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:01:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2022-11-19 08:01:29,361 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 29 [2022-11-19 08:01:29,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:29,361 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2022-11-19 08:01:29,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:01:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2022-11-19 08:01:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:01:29,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:29,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:29,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:29,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:29,568 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:01:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:29,569 INFO L85 PathProgramCache]: Analyzing trace with hash 391229284, now seen corresponding path program 1 times [2022-11-19 08:01:29,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:01:29,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664108150] [2022-11-19 08:01:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:29,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:01:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:01:29,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:01:29,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664108150] [2022-11-19 08:01:29,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664108150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:29,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592535916] [2022-11-19 08:01:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:29,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:29,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:29,967 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:29,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:01:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:30,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 08:01:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:30,099 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 [2022-11-19 08:01:30,133 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 7 treesize of output 6 [2022-11-19 08:01:30,202 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:01:30,203 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 [2022-11-19 08:01:30,244 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_303 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_303) |c_#memory_int|)) is different from true [2022-11-19 08:01:30,252 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 13 treesize of output 15 [2022-11-19 08:01:30,296 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 13 treesize of output 15 [2022-11-19 08:01:30,350 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 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-19 08:01:30,415 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 39 treesize of output 33 [2022-11-19 08:01:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-19 08:01:30,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:46,724 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_304 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_304) |c_ULTIMATE.start_main_~a~0#1.base|))) is different from false [2022-11-19 08:01:46,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592535916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:01:46,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064155376] [2022-11-19 08:01:46,744 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 08:01:46,744 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:01:46,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:01:46,745 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:01:46,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:01:46,925 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-19 08:01:46,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-19 08:01:47,055 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:01:47,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:01:47,150 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 7 treesize of output 6 [2022-11-19 08:01:47,268 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:01:47,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:01:47,541 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-19 08:01:47,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-19 08:01:47,723 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:01:47,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:01:47,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:01:47,991 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:01:48,153 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:01:48,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:01:48,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:01:48,398 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:01:48,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:48,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-19 08:01:48,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:01:48,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:01:48,985 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-19 08:01:48,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 482 treesize of output 478 [2022-11-19 08:01:49,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:01:49,009 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 477 treesize of output 469 [2022-11-19 08:01:50,177 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:01:50,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:01:50,461 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:01:50,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:01:50,605 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-19 08:01:50,612 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 7 treesize of output 6 [2022-11-19 08:01:50,613 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:01:50,614 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:02:01,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2064155376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:01,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:02:01,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [13, 16] total 48 [2022-11-19 08:02:01,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328262375] [2022-11-19 08:02:01,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:01,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:02:01,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:02:01,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2075, Unknown=18, NotChecked=190, Total=2550 [2022-11-19 08:02:01,593 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:02:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:02,664 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-11-19 08:02:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 08:02:02,664 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-11-19 08:02:02,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:02,665 INFO L225 Difference]: With dead ends: 96 [2022-11-19 08:02:02,665 INFO L226 Difference]: Without dead ends: 96 [2022-11-19 08:02:02,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=267, Invalid=2075, Unknown=18, NotChecked=190, Total=2550 [2022-11-19 08:02:02,667 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 61 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:02,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 153 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 589 Invalid, 0 Unknown, 142 Unchecked, 1.1s Time] [2022-11-19 08:02:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-19 08:02:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-19 08:02:02,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.4558823529411764) internal successors, (99), 83 states have internal predecessors, (99), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:02:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2022-11-19 08:02:02,671 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 29 [2022-11-19 08:02:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:02,671 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2022-11-19 08:02:02,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:02:02,672 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2022-11-19 08:02:02,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:02:02,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:02,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:02,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:02,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 08:02:02,880 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:02:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:02,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1727948839, now seen corresponding path program 1 times [2022-11-19 08:02:02,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:02,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817779722] [2022-11-19 08:02:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:02,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:02:03,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:03,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817779722] [2022-11-19 08:02:03,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817779722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:03,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247955368] [2022-11-19 08:02:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:03,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:03,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:03,101 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:03,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:02:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:03,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:02:03,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:02:03,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:03,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-19 08:02:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:02:03,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247955368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:03,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033615985] [2022-11-19 08:02:03,567 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 08:02:03,567 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:02:03,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:02:03,568 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:02:03,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:02:03,836 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 [2022-11-19 08:02:03,848 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 10 treesize of output 9 [2022-11-19 08:02:03,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-19 08:02:03,980 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:02:03,980 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:02:04,008 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:02:04,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:02:04,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:02:04,123 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:04,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:02:04,230 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:04,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-19 08:02:04,426 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:02:04,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-11-19 08:02:04,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:04,528 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:02:04,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:02:04,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:04,568 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:02:04,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:02:04,924 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:02:04,950 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:02:04,952 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:02:09,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1033615985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:09,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:02:09,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [9, 9, 9] total 45 [2022-11-19 08:02:09,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185181358] [2022-11-19 08:02:09,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:09,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:02:09,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:09,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:02:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1763, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 08:02:09,452 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:02:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:14,834 INFO L93 Difference]: Finished difference Result 161 states and 191 transitions. [2022-11-19 08:02:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 08:02:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2022-11-19 08:02:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:14,836 INFO L225 Difference]: With dead ends: 161 [2022-11-19 08:02:14,836 INFO L226 Difference]: Without dead ends: 161 [2022-11-19 08:02:14,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=589, Invalid=2833, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 08:02:14,838 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 356 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:14,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 118 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:02:14,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-19 08:02:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 113. [2022-11-19 08:02:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 85 states have (on average 1.4941176470588236) internal successors, (127), 100 states have internal predecessors, (127), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:02:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 141 transitions. [2022-11-19 08:02:14,850 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 141 transitions. Word has length 30 [2022-11-19 08:02:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:14,850 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 141 transitions. [2022-11-19 08:02:14,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:02:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 141 transitions. [2022-11-19 08:02:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:02:14,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:14,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:14,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:15,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:15,057 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:02:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash -756789932, now seen corresponding path program 1 times [2022-11-19 08:02:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:15,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030301255] [2022-11-19 08:02:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:15,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:02:15,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:15,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030301255] [2022-11-19 08:02:15,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030301255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:15,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:15,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:02:15,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751307911] [2022-11-19 08:02:15,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:15,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:02:15,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:02:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:02:15,149 INFO L87 Difference]: Start difference. First operand 113 states and 141 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 08:02:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:15,249 INFO L93 Difference]: Finished difference Result 112 states and 139 transitions. [2022-11-19 08:02:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:02:15,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-19 08:02:15,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:15,250 INFO L225 Difference]: With dead ends: 112 [2022-11-19 08:02:15,250 INFO L226 Difference]: Without dead ends: 112 [2022-11-19 08:02:15,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:02:15,251 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 88 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:15,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 84 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:02:15,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-19 08:02:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-19 08:02:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 85 states have (on average 1.4705882352941178) internal successors, (125), 99 states have internal predecessors, (125), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:02:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2022-11-19 08:02:15,255 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 30 [2022-11-19 08:02:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:15,255 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2022-11-19 08:02:15,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 08:02:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2022-11-19 08:02:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:02:15,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:15,256 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:15,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 08:02:15,257 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:02:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:15,257 INFO L85 PathProgramCache]: Analyzing trace with hash -756789931, now seen corresponding path program 1 times [2022-11-19 08:02:15,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:15,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810069909] [2022-11-19 08:02:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:15,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:02:15,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:15,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810069909] [2022-11-19 08:02:15,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810069909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:15,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103476115] [2022-11-19 08:02:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:15,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:15,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:15,467 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:15,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:02:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:02:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:02:15,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:15,737 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 23 treesize of output 19 [2022-11-19 08:02:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:02:15,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103476115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:15,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [400652364] [2022-11-19 08:02:15,782 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 08:02:15,782 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:02:15,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:02:15,783 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:02:15,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:02:15,950 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-19 08:02:15,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-19 08:02:16,069 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:02:16,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:02:16,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-19 08:02:16,298 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:02:16,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:02:16,577 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-19 08:02:16,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-19 08:02:16,786 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:02:16,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:02:17,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:02:17,019 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:17,157 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:02:17,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:02:17,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:02:17,403 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:17,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:17,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-19 08:02:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:17,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-19 08:02:17,792 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-19 08:02:17,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 450 treesize of output 446 [2022-11-19 08:02:17,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:17,819 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 445 treesize of output 442 [2022-11-19 08:02:19,205 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:02:19,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:02:19,449 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:02:19,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:02:19,574 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-19 08:02:19,579 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 7 treesize of output 6 [2022-11-19 08:02:19,581 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:02:19,582 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:02:30,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [400652364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:30,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:02:30,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [5, 5, 5] total 32 [2022-11-19 08:02:30,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139476986] [2022-11-19 08:02:30,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:30,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:02:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:02:30,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 08:02:30,214 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:02:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:30,978 INFO L93 Difference]: Finished difference Result 116 states and 142 transitions. [2022-11-19 08:02:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:02:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2022-11-19 08:02:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:30,980 INFO L225 Difference]: With dead ends: 116 [2022-11-19 08:02:30,980 INFO L226 Difference]: Without dead ends: 116 [2022-11-19 08:02:30,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 08:02:30,981 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:30,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 154 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 410 Invalid, 0 Unknown, 117 Unchecked, 0.8s Time] [2022-11-19 08:02:30,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-19 08:02:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-19 08:02:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 88 states have (on average 1.4545454545454546) internal successors, (128), 102 states have internal predecessors, (128), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:02:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2022-11-19 08:02:30,985 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 30 [2022-11-19 08:02:30,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:30,986 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2022-11-19 08:02:30,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:02:30,986 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2022-11-19 08:02:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 08:02:30,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:30,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:30,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:31,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 08:02:31,193 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:02:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1869919005, now seen corresponding path program 1 times [2022-11-19 08:02:31,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:31,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819340962] [2022-11-19 08:02:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:31,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:02:31,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:31,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819340962] [2022-11-19 08:02:31,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819340962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:31,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427270600] [2022-11-19 08:02:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:31,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:31,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:31,324 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:31,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:02:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:31,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:02:31,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:02:31,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:02:31,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427270600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:31,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1980113599] [2022-11-19 08:02:31,523 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:02:31,523 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:02:31,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:02:31,524 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:02:31,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:02:31,805 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 [2022-11-19 08:02:31,811 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 10 treesize of output 9 [2022-11-19 08:02:31,842 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 7 treesize of output 6 [2022-11-19 08:02:31,929 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:02:31,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:02:31,955 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:02:31,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:02:32,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:02:32,073 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:32,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:02:32,183 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:32,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-19 08:02:32,328 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:02:32,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-11-19 08:02:32,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:32,428 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:02:32,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:02:32,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:32,464 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:02:32,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:02:32,652 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-19 08:02:32,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 262 treesize of output 287 [2022-11-19 08:02:33,195 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-19 08:02:33,196 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 257 treesize of output 273 [2022-11-19 08:02:33,412 INFO L321 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-11-19 08:02:33,413 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 33 treesize of output 36 [2022-11-19 08:02:33,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:33,585 INFO L321 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2022-11-19 08:02:33,585 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 255 treesize of output 237 [2022-11-19 08:02:33,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:02:33,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:02:33,701 INFO L321 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2022-11-19 08:02:33,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 1 [2022-11-19 08:02:35,483 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:02:35,515 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:02:35,516 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:02:42,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1980113599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:42,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:02:42,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 6, 6] total 30 [2022-11-19 08:02:42,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180165684] [2022-11-19 08:02:42,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:42,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:02:42,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:02:42,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:02:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-11-19 08:02:42,470 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:02:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:48,796 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2022-11-19 08:02:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 08:02:48,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2022-11-19 08:02:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:48,800 INFO L225 Difference]: With dead ends: 160 [2022-11-19 08:02:48,801 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:02:48,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:02:48,804 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 432 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:48,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 112 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:02:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:02:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2022-11-19 08:02:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 93 states have (on average 1.4408602150537635) internal successors, (134), 107 states have internal predecessors, (134), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:02:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2022-11-19 08:02:48,809 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 31 [2022-11-19 08:02:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:48,809 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2022-11-19 08:02:48,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:02:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2022-11-19 08:02:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:02:48,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:48,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:48,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:49,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 08:02:49,016 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:02:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1425596276, now seen corresponding path program 1 times [2022-11-19 08:02:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:02:49,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877928874] [2022-11-19 08:02:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:02:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:02:49,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:02:49,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877928874] [2022-11-19 08:02:49,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877928874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:02:49,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744262634] [2022-11-19 08:02:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:49,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:49,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:49,165 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:49,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 08:02:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:49,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:02:49,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:02:49,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:02:49,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744262634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:49,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499920130] [2022-11-19 08:02:49,404 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 08:02:49,404 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:02:49,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:02:49,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:02:49,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:02:49,579 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-19 08:02:49,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-19 08:02:49,690 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:02:49,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:02:49,795 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 7 treesize of output 6 [2022-11-19 08:02:49,903 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:02:49,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:02:50,195 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-19 08:02:50,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-19 08:02:50,386 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:02:50,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:02:50,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:02:50,635 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:50,778 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:02:50,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:02:51,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:02:51,030 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:02:51,293 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:02:51,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-19 08:02:51,521 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:02:51,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 330 treesize of output 326 [2022-11-19 08:02:51,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:02:52,841 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:02:52,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:02:53,088 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:02:53,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:02:53,211 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-19 08:02:53,220 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 7 treesize of output 6 [2022-11-19 08:02:53,221 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:02:53,222 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:03,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1499920130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:03,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:03:03,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [8, 7, 7] total 35 [2022-11-19 08:03:03,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938487021] [2022-11-19 08:03:03,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:03,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 08:03:03,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:03,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 08:03:03,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:03:03,091 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:03:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:04,811 INFO L93 Difference]: Finished difference Result 139 states and 166 transitions. [2022-11-19 08:03:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 08:03:04,812 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2022-11-19 08:03:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:04,812 INFO L225 Difference]: With dead ends: 139 [2022-11-19 08:03:04,812 INFO L226 Difference]: Without dead ends: 139 [2022-11-19 08:03:04,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:03:04,813 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 119 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:04,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 268 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-19 08:03:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-19 08:03:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 128. [2022-11-19 08:03:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 100 states have (on average 1.43) internal successors, (143), 114 states have internal predecessors, (143), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:03:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 157 transitions. [2022-11-19 08:03:04,818 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 157 transitions. Word has length 32 [2022-11-19 08:03:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:04,818 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 157 transitions. [2022-11-19 08:03:04,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:03:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 157 transitions. [2022-11-19 08:03:04,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:03:04,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:04,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:04,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:05,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:05,025 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:03:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:05,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2140677764, now seen corresponding path program 1 times [2022-11-19 08:03:05,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:05,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276516999] [2022-11-19 08:03:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:05,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:03:05,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276516999] [2022-11-19 08:03:05,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276516999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046848378] [2022-11-19 08:03:05,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:05,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:05,186 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:05,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 08:03:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:05,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:03:05,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:03:05,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:03:05,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046848378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:05,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1704414387] [2022-11-19 08:03:05,463 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:03:05,463 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:05,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:05,464 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:05,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:03:05,704 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 10 treesize of output 9 [2022-11-19 08:03:05,709 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 [2022-11-19 08:03:05,749 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 7 treesize of output 6 [2022-11-19 08:03:05,838 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:03:05,838 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:03:05,865 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:03:05,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:03:05,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:03:05,986 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:03:06,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:03:06,076 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:03:06,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:03:06,228 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:03:06,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-11-19 08:03:06,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:06,316 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:03:06,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:03:06,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:06,360 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:03:06,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:03:06,651 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-19 08:03:06,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 285 treesize of output 306 [2022-11-19 08:03:06,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:06,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:07,014 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:03:07,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 276 treesize of output 309 [2022-11-19 08:03:07,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:07,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:07,157 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:03:07,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-19 08:03:07,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:07,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:07,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:07,355 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:03:07,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-19 08:03:07,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:07,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:07,505 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:03:07,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 297 [2022-11-19 08:03:07,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:07,718 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 36 treesize of output 28 [2022-11-19 08:03:07,855 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:03:07,889 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:03:07,890 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:12,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9537#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:03:12,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:03:12,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:03:12,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-11-19 08:03:12,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819739136] [2022-11-19 08:03:12,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:03:12,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 08:03:12,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:12,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 08:03:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:03:12,364 INFO L87 Difference]: Start difference. First operand 128 states and 157 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:03:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:12,870 INFO L93 Difference]: Finished difference Result 296 states and 349 transitions. [2022-11-19 08:03:12,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 08:03:12,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-19 08:03:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:12,873 INFO L225 Difference]: With dead ends: 296 [2022-11-19 08:03:12,873 INFO L226 Difference]: Without dead ends: 296 [2022-11-19 08:03:12,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=219, Invalid=1851, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 08:03:12,874 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 544 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:12,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 797 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:03:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-19 08:03:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 148. [2022-11-19 08:03:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 120 states have (on average 1.45) internal successors, (174), 134 states have internal predecessors, (174), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:03:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2022-11-19 08:03:12,880 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 33 [2022-11-19 08:03:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:12,881 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2022-11-19 08:03:12,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:03:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2022-11-19 08:03:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:03:12,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:12,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:12,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:13,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 08:03:13,089 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:03:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1695768893, now seen corresponding path program 1 times [2022-11-19 08:03:13,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:13,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766743691] [2022-11-19 08:03:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:13,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:03:13,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:13,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766743691] [2022-11-19 08:03:13,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766743691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:13,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408771231] [2022-11-19 08:03:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:13,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:13,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:13,245 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:13,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:03:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:13,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:03:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:03:13,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:03:13,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408771231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:13,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [268415603] [2022-11-19 08:03:13,440 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 08:03:13,440 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:13,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:13,441 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:13,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:03:13,747 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 10 treesize of output 9 [2022-11-19 08:03:13,757 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 [2022-11-19 08:03:13,798 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 7 treesize of output 6 [2022-11-19 08:03:13,903 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:03:13,903 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:03:13,929 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:03:13,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:03:14,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:03:14,035 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:03:14,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:03:14,126 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:03:14,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-19 08:03:14,303 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:03:14,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-11-19 08:03:14,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:14,407 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:03:14,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:03:14,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:14,446 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:03:14,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:03:14,619 INFO L321 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-19 08:03:14,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 262 treesize of output 287 [2022-11-19 08:03:14,917 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-19 08:03:14,917 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 33 treesize of output 49 [2022-11-19 08:03:15,037 INFO L321 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2022-11-19 08:03:15,037 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 257 treesize of output 273 [2022-11-19 08:03:15,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:15,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:15,187 INFO L321 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2022-11-19 08:03:15,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 1 [2022-11-19 08:03:15,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:15,245 INFO L321 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2022-11-19 08:03:15,245 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 255 treesize of output 237 [2022-11-19 08:03:17,112 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:03:17,140 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:03:17,141 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:24,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [268415603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:24,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:03:24,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [7, 6, 6] total 31 [2022-11-19 08:03:24,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278835083] [2022-11-19 08:03:24,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:24,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:03:24,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:24,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:03:24,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:03:24,204 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:03:31,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:31,647 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2022-11-19 08:03:31,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 08:03:31,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2022-11-19 08:03:31,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:31,649 INFO L225 Difference]: With dead ends: 186 [2022-11-19 08:03:31,649 INFO L226 Difference]: Without dead ends: 186 [2022-11-19 08:03:31,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=318, Invalid=1662, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:03:31,650 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 315 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:31,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 118 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 08:03:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-19 08:03:31,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 148. [2022-11-19 08:03:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 120 states have (on average 1.4416666666666667) internal successors, (173), 134 states have internal predecessors, (173), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:03:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2022-11-19 08:03:31,656 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 33 [2022-11-19 08:03:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:31,657 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2022-11-19 08:03:31,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:03:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2022-11-19 08:03:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 08:03:31,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:31,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:31,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:31,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 08:03:31,873 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:03:31,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:31,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1300010611, now seen corresponding path program 1 times [2022-11-19 08:03:31,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:31,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489675705] [2022-11-19 08:03:31,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:31,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:03:32,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:32,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489675705] [2022-11-19 08:03:32,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489675705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:32,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501540567] [2022-11-19 08:03:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:32,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:32,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:32,020 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:32,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 08:03:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:32,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:03:32,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:03:32,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:03:32,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501540567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:32,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138330115] [2022-11-19 08:03:32,278 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 08:03:32,278 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:32,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:32,279 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:32,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:03:32,452 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-19 08:03:32,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 223 [2022-11-19 08:03:32,589 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:03:32,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:03:32,680 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 7 treesize of output 6 [2022-11-19 08:03:32,796 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:03:32,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:03:33,020 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-19 08:03:33,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 253 treesize of output 256 [2022-11-19 08:03:33,198 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:03:33,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:03:33,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:03:33,420 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:03:33,556 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:03:33,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:03:33,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:03:33,783 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:03:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:33,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:03:33,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:33,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:03:34,176 INFO L321 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2022-11-19 08:03:34,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 488 treesize of output 484 [2022-11-19 08:03:34,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:34,198 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 483 treesize of output 475 [2022-11-19 08:03:36,584 INFO L321 Elim1Store]: treesize reduction 182, result has 12.5 percent of original size [2022-11-19 08:03:36,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 272 treesize of output 267 [2022-11-19 08:03:36,814 INFO L321 Elim1Store]: treesize reduction 66, result has 19.5 percent of original size [2022-11-19 08:03:36,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 220 [2022-11-19 08:03:36,944 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 25 for LOIs [2022-11-19 08:03:36,950 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 7 treesize of output 6 [2022-11-19 08:03:36,952 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:03:36,953 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:50,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2138330115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:50,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:03:50,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [8, 7, 7] total 36 [2022-11-19 08:03:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590375867] [2022-11-19 08:03:50,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:50,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:03:50,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:50,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:03:50,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 08:03:50,030 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:03:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:51,869 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2022-11-19 08:03:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 08:03:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2022-11-19 08:03:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:51,870 INFO L225 Difference]: With dead ends: 158 [2022-11-19 08:03:51,871 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 08:03:51,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 08:03:51,871 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 88 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:51,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 271 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1025 Invalid, 0 Unknown, 96 Unchecked, 1.8s Time] [2022-11-19 08:03:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 08:03:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 144. [2022-11-19 08:03:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 116 states have (on average 1.4482758620689655) internal successors, (168), 130 states have internal predecessors, (168), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:03:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 182 transitions. [2022-11-19 08:03:51,877 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 182 transitions. Word has length 35 [2022-11-19 08:03:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:51,877 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 182 transitions. [2022-11-19 08:03:51,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:03:51,878 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 182 transitions. [2022-11-19 08:03:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:03:51,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:51,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:51,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:52,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 08:03:52,089 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:03:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:52,089 INFO L85 PathProgramCache]: Analyzing trace with hash 679838038, now seen corresponding path program 2 times [2022-11-19 08:03:52,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:52,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066689950] [2022-11-19 08:03:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:52,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:03:52,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:52,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066689950] [2022-11-19 08:03:52,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066689950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:03:52,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500097661] [2022-11-19 08:03:52,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:03:52,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:52,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:52,360 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:52,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 08:03:52,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:03:52,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:03:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:03:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:03:52,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:03:52,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500097661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115271385] [2022-11-19 08:03:52,993 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:03:52,994 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:52,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:52,994 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:52,994 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:03:53,274 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 10 treesize of output 9 [2022-11-19 08:03:53,287 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 [2022-11-19 08:03:53,318 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 7 treesize of output 6 [2022-11-19 08:03:53,401 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:03:53,402 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:03:53,427 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:03:53,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:03:53,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:03:53,529 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:03:53,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:03:53,636 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:03:53,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:03:53,796 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:03:53,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 266 treesize of output 263 [2022-11-19 08:03:53,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:53,881 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:03:53,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:03:53,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:53,920 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:03:53,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:03:54,167 INFO L321 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2022-11-19 08:03:54,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 280 treesize of output 301 [2022-11-19 08:03:54,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:54,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:54,346 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:03:54,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 80 [2022-11-19 08:03:54,372 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:03:54,417 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:03:54,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:03:54,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:54,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:54,485 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:03:54,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 68 [2022-11-19 08:03:54,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:54,624 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-19 08:03:54,785 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:03:54,808 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:03:54,809 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:59,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11382#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:03:59,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:03:59,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:03:59,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2022-11-19 08:03:59,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212109231] [2022-11-19 08:03:59,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:03:59,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 08:03:59,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 08:03:59,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 08:03:59,362 INFO L87 Difference]: Start difference. First operand 144 states and 182 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 08:04:01,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:01,809 INFO L93 Difference]: Finished difference Result 423 states and 492 transitions. [2022-11-19 08:04:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-19 08:04:01,810 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2022-11-19 08:04:01,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:01,811 INFO L225 Difference]: With dead ends: 423 [2022-11-19 08:04:01,812 INFO L226 Difference]: Without dead ends: 423 [2022-11-19 08:04:01,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=839, Invalid=4861, Unknown=0, NotChecked=0, Total=5700 [2022-11-19 08:04:01,813 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1078 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:01,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 636 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:04:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-19 08:04:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 144. [2022-11-19 08:04:01,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 116 states have (on average 1.4396551724137931) internal successors, (167), 130 states have internal predecessors, (167), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:04:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 181 transitions. [2022-11-19 08:04:01,823 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 181 transitions. Word has length 36 [2022-11-19 08:04:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:01,823 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 181 transitions. [2022-11-19 08:04:01,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 08:04:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 181 transitions. [2022-11-19 08:04:01,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:04:01,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:01,824 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:01,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:02,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:02,030 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:02,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1114928978, now seen corresponding path program 1 times [2022-11-19 08:04:02,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:02,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891755486] [2022-11-19 08:04:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:02,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:04:02,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:02,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891755486] [2022-11-19 08:04:02,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891755486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:02,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143095467] [2022-11-19 08:04:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:02,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:02,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:02,193 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:02,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 08:04:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:02,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:04:02,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:02,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:02,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143095467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:02,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613809483] [2022-11-19 08:04:02,461 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:04:02,461 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:02,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:02,461 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:02,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:02,768 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 10 treesize of output 9 [2022-11-19 08:04:02,773 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 [2022-11-19 08:04:02,814 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 7 treesize of output 6 [2022-11-19 08:04:02,938 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:04:02,938 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:04:02,969 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:04:02,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:04:03,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:03,089 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:03,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:03,207 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:03,358 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-19 08:04:03,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-19 08:04:03,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:03,457 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:03,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:03,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:03,517 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:03,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:03,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:03,558 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:03,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:03,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:03,660 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 36 treesize of output 28 [2022-11-19 08:04:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:03,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-19 08:04:03,899 INFO L321 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2022-11-19 08:04:03,899 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 36 treesize of output 44 [2022-11-19 08:04:04,089 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:04:04,116 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:04:04,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:07,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12249#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (or (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (not (<= 0 (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset|)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:04:07,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:04:07,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:07,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-11-19 08:04:07,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556648139] [2022-11-19 08:04:07,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:07,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:04:07,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:04:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:04:07,745 INFO L87 Difference]: Start difference. First operand 144 states and 181 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:04:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:08,104 INFO L93 Difference]: Finished difference Result 214 states and 249 transitions. [2022-11-19 08:04:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:04:08,105 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2022-11-19 08:04:08,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:08,106 INFO L225 Difference]: With dead ends: 214 [2022-11-19 08:04:08,106 INFO L226 Difference]: Without dead ends: 214 [2022-11-19 08:04:08,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=193, Invalid=1367, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 08:04:08,107 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 230 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:08,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 490 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:04:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-19 08:04:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 134. [2022-11-19 08:04:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 106 states have (on average 1.3962264150943395) internal successors, (148), 120 states have internal predecessors, (148), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:04:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 162 transitions. [2022-11-19 08:04:08,111 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 162 transitions. Word has length 36 [2022-11-19 08:04:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:08,112 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 162 transitions. [2022-11-19 08:04:08,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:04:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 162 transitions. [2022-11-19 08:04:08,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:04:08,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:08,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:08,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:08,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:08,318 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:08,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1241710387, now seen corresponding path program 1 times [2022-11-19 08:04:08,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:08,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690742122] [2022-11-19 08:04:08,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:08,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:08,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:08,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690742122] [2022-11-19 08:04:08,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690742122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:08,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334814615] [2022-11-19 08:04:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:08,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:08,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:08,459 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:08,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 08:04:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:08,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:04:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:04:08,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:08,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:04:08,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334814615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:08,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368178274] [2022-11-19 08:04:08,665 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 08:04:08,665 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:08,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:08,666 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:08,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:08,939 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 [2022-11-19 08:04:08,944 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 10 treesize of output 9 [2022-11-19 08:04:08,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-19 08:04:09,071 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:04:09,072 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:04:09,099 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:04:09,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:04:09,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:09,199 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:09,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:09,297 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:09,405 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-19 08:04:09,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-19 08:04:09,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:09,494 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:09,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:09,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:09,545 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:09,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:09,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:09,585 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:09,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:09,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:04:10,225 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:04:10,253 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:04:10,254 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:18,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12851#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_~space~0#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 |#NULL.base|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= |ULTIMATE.start_upsweep_#res#1| 1) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 (+ |ULTIMATE.start_check_#in~n#1| 2147483648)) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 1 |ULTIMATE.start_main_~space~1#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_check_~n#1| 1) (<= 0 |ULTIMATE.start_check_~sum~0#1|) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~n#1| 1) (<= 1 |ULTIMATE.start_upsweep_#res#1|) (<= |ULTIMATE.start_main_~space~1#1| 1) (<= |ULTIMATE.start_upsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a0#1.offset| 0) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_check_#in~n#1| 1) (<= |ULTIMATE.start_check_~a0#1.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 1 |ULTIMATE.start_downsweep_#in~space#1|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_upsweep_#in~n#1| 1) (<= |ULTIMATE.start_downsweep_~n#1| 1) (<= |ULTIMATE.start_check_#in~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |#NULL.base| 0) (<= |ULTIMATE.start_check_~a#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_check_~sum~0#1| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= 0 |ULTIMATE.start_check_~a0#1.offset|) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~n~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |ULTIMATE.start_check_#in~a0#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-19 08:04:18,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:04:18,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:18,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2022-11-19 08:04:18,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42460574] [2022-11-19 08:04:18,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:18,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:04:18,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:18,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:04:18,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:04:18,203 INFO L87 Difference]: Start difference. First operand 134 states and 162 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:04:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:18,448 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2022-11-19 08:04:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:04:18,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2022-11-19 08:04:18,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:18,449 INFO L225 Difference]: With dead ends: 139 [2022-11-19 08:04:18,449 INFO L226 Difference]: Without dead ends: 139 [2022-11-19 08:04:18,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 08:04:18,450 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 249 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:18,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 287 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:04:18,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-19 08:04:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 127. [2022-11-19 08:04:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 99 states have (on average 1.404040404040404) internal successors, (139), 113 states have internal predecessors, (139), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:04:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2022-11-19 08:04:18,454 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 36 [2022-11-19 08:04:18,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:18,454 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2022-11-19 08:04:18,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:04:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2022-11-19 08:04:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:04:18,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:18,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:18,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:18,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-19 08:04:18,657 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:18,657 INFO L85 PathProgramCache]: Analyzing trace with hash 864999468, now seen corresponding path program 1 times [2022-11-19 08:04:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:18,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734919872] [2022-11-19 08:04:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:18,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:18,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:18,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734919872] [2022-11-19 08:04:18,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734919872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:18,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:18,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:04:18,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336672280] [2022-11-19 08:04:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:18,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:04:18,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:04:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:04:18,709 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 08:04:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:18,763 INFO L93 Difference]: Finished difference Result 126 states and 152 transitions. [2022-11-19 08:04:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:04:18,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-11-19 08:04:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:18,764 INFO L225 Difference]: With dead ends: 126 [2022-11-19 08:04:18,765 INFO L226 Difference]: Without dead ends: 126 [2022-11-19 08:04:18,765 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 [2022-11-19 08:04:18,765 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 80 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:18,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:04:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-19 08:04:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-19 08:04:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 99 states have (on average 1.393939393939394) internal successors, (138), 112 states have internal predecessors, (138), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:04:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2022-11-19 08:04:18,771 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 152 transitions. Word has length 36 [2022-11-19 08:04:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:18,771 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 152 transitions. [2022-11-19 08:04:18,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 08:04:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 152 transitions. [2022-11-19 08:04:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:04:18,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:18,772 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:18,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-19 08:04:18,772 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash -399857295, now seen corresponding path program 1 times [2022-11-19 08:04:18,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:18,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418721749] [2022-11-19 08:04:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:18,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:04:19,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:19,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418721749] [2022-11-19 08:04:19,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418721749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:19,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097685964] [2022-11-19 08:04:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:19,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:19,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:19,097 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:19,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 08:04:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:04:19,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:04:19,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:04:19,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097685964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:19,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671734729] [2022-11-19 08:04:19,784 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:04:19,784 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:19,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:19,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:19,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:20,004 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 [2022-11-19 08:04:20,009 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 10 treesize of output 9 [2022-11-19 08:04:20,046 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 7 treesize of output 6 [2022-11-19 08:04:20,131 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:04:20,131 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:04:20,158 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:04:20,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:04:20,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:20,261 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:20,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:20,348 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:20,464 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:04:20,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-19 08:04:20,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:20,548 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:20,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:20,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:20,584 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:20,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:20,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:20,662 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 36 treesize of output 28 [2022-11-19 08:04:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:20,712 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 36 treesize of output 28 [2022-11-19 08:04:20,848 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:04:20,874 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:04:20,875 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:24,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13644#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:04:24,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:04:24,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:24,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-11-19 08:04:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565736296] [2022-11-19 08:04:24,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:24,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:04:24,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:24,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:04:24,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 08:04:24,654 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 08:04:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:26,212 INFO L93 Difference]: Finished difference Result 326 states and 395 transitions. [2022-11-19 08:04:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 08:04:26,212 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-11-19 08:04:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:26,213 INFO L225 Difference]: With dead ends: 326 [2022-11-19 08:04:26,213 INFO L226 Difference]: Without dead ends: 326 [2022-11-19 08:04:26,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=443, Invalid=3339, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 08:04:26,215 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 732 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:26,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 560 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:04:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-19 08:04:26,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 135. [2022-11-19 08:04:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 121 states have internal predecessors, (148), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:04:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 162 transitions. [2022-11-19 08:04:26,221 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 162 transitions. Word has length 37 [2022-11-19 08:04:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:26,221 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 162 transitions. [2022-11-19 08:04:26,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-19 08:04:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 162 transitions. [2022-11-19 08:04:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:04:26,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:26,222 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:26,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:26,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-19 08:04:26,428 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:26,429 INFO L85 PathProgramCache]: Analyzing trace with hash -46172498, now seen corresponding path program 1 times [2022-11-19 08:04:26,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:26,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063073300] [2022-11-19 08:04:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:26,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:26,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:26,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063073300] [2022-11-19 08:04:26,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063073300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:26,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547607128] [2022-11-19 08:04:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:26,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:26,625 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:26,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 08:04:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:26,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:04:26,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:04:26,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:04:26,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547607128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:26,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:04:26,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-11-19 08:04:26,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911513675] [2022-11-19 08:04:26,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:26,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:04:26,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:04:26,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:04:26,794 INFO L87 Difference]: Start difference. First operand 135 states and 162 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:04:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:26,898 INFO L93 Difference]: Finished difference Result 148 states and 172 transitions. [2022-11-19 08:04:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:04:26,898 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-11-19 08:04:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:26,899 INFO L225 Difference]: With dead ends: 148 [2022-11-19 08:04:26,899 INFO L226 Difference]: Without dead ends: 148 [2022-11-19 08:04:26,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:04:26,900 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 112 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:26,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 164 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:04:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-19 08:04:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2022-11-19 08:04:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 110 states have (on average 1.3636363636363635) internal successors, (150), 123 states have internal predecessors, (150), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:04:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2022-11-19 08:04:26,905 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 37 [2022-11-19 08:04:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:26,906 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2022-11-19 08:04:26,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:04:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2022-11-19 08:04:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:04:26,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:26,907 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:26,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:27,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:27,112 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:27,112 INFO L85 PathProgramCache]: Analyzing trace with hash -46298516, now seen corresponding path program 1 times [2022-11-19 08:04:27,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:27,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874466253] [2022-11-19 08:04:27,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:27,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:04:27,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:27,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874466253] [2022-11-19 08:04:27,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874466253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:27,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:27,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:04:27,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331909333] [2022-11-19 08:04:27,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:27,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:04:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:04:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:04:27,250 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:04:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:27,453 INFO L93 Difference]: Finished difference Result 167 states and 196 transitions. [2022-11-19 08:04:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:04:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-11-19 08:04:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:27,455 INFO L225 Difference]: With dead ends: 167 [2022-11-19 08:04:27,455 INFO L226 Difference]: Without dead ends: 167 [2022-11-19 08:04:27,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:04:27,455 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 213 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:27,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 124 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:04:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-19 08:04:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 142. [2022-11-19 08:04:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 115 states have (on average 1.3652173913043477) internal successors, (157), 128 states have internal predecessors, (157), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:04:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2022-11-19 08:04:27,460 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 37 [2022-11-19 08:04:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:27,460 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2022-11-19 08:04:27,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:04:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2022-11-19 08:04:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:04:27,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:27,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:27,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-19 08:04:27,462 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:27,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1045179935, now seen corresponding path program 1 times [2022-11-19 08:04:27,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:27,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290349966] [2022-11-19 08:04:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:27,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:27,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:27,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290349966] [2022-11-19 08:04:27,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290349966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:27,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:27,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:04:27,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518360609] [2022-11-19 08:04:27,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:27,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:04:27,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:27,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:04:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:04:27,584 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:04:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:27,693 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2022-11-19 08:04:27,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:04:27,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-11-19 08:04:27,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:27,694 INFO L225 Difference]: With dead ends: 141 [2022-11-19 08:04:27,694 INFO L226 Difference]: Without dead ends: 141 [2022-11-19 08:04:27,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:04:27,695 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 132 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:27,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 59 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:04:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-19 08:04:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-19 08:04:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 115 states have (on average 1.3565217391304347) internal successors, (156), 127 states have internal predecessors, (156), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:04:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 170 transitions. [2022-11-19 08:04:27,701 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 170 transitions. Word has length 37 [2022-11-19 08:04:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:27,701 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 170 transitions. [2022-11-19 08:04:27,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:04:27,702 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 170 transitions. [2022-11-19 08:04:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:04:27,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:27,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:27,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-19 08:04:27,704 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:27,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1435250909, now seen corresponding path program 1 times [2022-11-19 08:04:27,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:27,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437211128] [2022-11-19 08:04:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:27,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:04:27,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:27,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437211128] [2022-11-19 08:04:27,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437211128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:27,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:27,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:04:27,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644484794] [2022-11-19 08:04:27,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:27,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:04:27,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:27,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:04:27,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:04:27,871 INFO L87 Difference]: Start difference. First operand 141 states and 170 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:04:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:28,135 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2022-11-19 08:04:28,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:04:28,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-11-19 08:04:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:28,137 INFO L225 Difference]: With dead ends: 178 [2022-11-19 08:04:28,137 INFO L226 Difference]: Without dead ends: 178 [2022-11-19 08:04:28,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:04:28,138 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 192 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:28,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 164 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:04:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-19 08:04:28,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 139. [2022-11-19 08:04:28,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.3304347826086957) internal successors, (153), 125 states have internal predecessors, (153), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:04:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 167 transitions. [2022-11-19 08:04:28,143 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 167 transitions. Word has length 38 [2022-11-19 08:04:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:28,143 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 167 transitions. [2022-11-19 08:04:28,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:04:28,143 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 167 transitions. [2022-11-19 08:04:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:04:28,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:28,144 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:28,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-19 08:04:28,145 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1959160177, now seen corresponding path program 1 times [2022-11-19 08:04:28,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:28,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861636433] [2022-11-19 08:04:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:28,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:28,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:28,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861636433] [2022-11-19 08:04:28,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861636433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:04:28,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:04:28,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:04:28,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546501406] [2022-11-19 08:04:28,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:04:28,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:04:28,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:28,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:04:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:04:28,392 INFO L87 Difference]: Start difference. First operand 139 states and 167 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:04:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:28,646 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2022-11-19 08:04:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:04:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-11-19 08:04:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:28,647 INFO L225 Difference]: With dead ends: 138 [2022-11-19 08:04:28,647 INFO L226 Difference]: Without dead ends: 108 [2022-11-19 08:04:28,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:04:28,648 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 71 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:28,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 97 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:04:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-19 08:04:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-11-19 08:04:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 90 states have (on average 1.3777777777777778) internal successors, (124), 99 states have internal predecessors, (124), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:04:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 132 transitions. [2022-11-19 08:04:28,652 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 132 transitions. Word has length 38 [2022-11-19 08:04:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:28,658 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 132 transitions. [2022-11-19 08:04:28,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 08:04:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 132 transitions. [2022-11-19 08:04:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 08:04:28,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:28,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:28,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-19 08:04:28,660 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:28,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:28,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1539597552, now seen corresponding path program 1 times [2022-11-19 08:04:28,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:28,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036991202] [2022-11-19 08:04:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:28,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:28,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:28,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036991202] [2022-11-19 08:04:28,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036991202] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:28,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131311145] [2022-11-19 08:04:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:28,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:28,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:28,849 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:28,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 08:04:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:28,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:04:28,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:04:29,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:04:29,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131311145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:29,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419439439] [2022-11-19 08:04:29,174 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 08:04:29,174 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:29,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:29,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:29,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:29,477 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 [2022-11-19 08:04:29,484 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 10 treesize of output 9 [2022-11-19 08:04:29,522 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 7 treesize of output 6 [2022-11-19 08:04:29,607 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:04:29,607 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:04:29,634 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:04:29,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:04:29,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:29,753 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:29,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:29,840 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:29,952 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:04:29,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-19 08:04:30,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:30,022 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:30,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:30,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:30,058 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:30,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:30,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:30,153 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 36 treesize of output 28 [2022-11-19 08:04:30,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:30,252 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-19 08:04:30,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:30,330 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 36 treesize of output 28 [2022-11-19 08:04:30,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:04:30,662 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:04:30,696 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:04:30,698 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:36,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16042#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:04:36,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:04:36,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:36,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-11-19 08:04:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361514767] [2022-11-19 08:04:36,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:04:36,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:04:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 08:04:36,270 INFO L87 Difference]: Start difference. First operand 108 states and 132 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:04:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:36,492 INFO L93 Difference]: Finished difference Result 105 states and 125 transitions. [2022-11-19 08:04:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:04:36,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-11-19 08:04:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:36,496 INFO L225 Difference]: With dead ends: 105 [2022-11-19 08:04:36,496 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 08:04:36,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=244, Invalid=1648, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:04:36,497 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 136 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:36,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 204 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:04:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 08:04:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2022-11-19 08:04:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.3157894736842106) internal successors, (100), 85 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:04:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2022-11-19 08:04:36,500 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 39 [2022-11-19 08:04:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:36,501 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2022-11-19 08:04:36,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:04:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2022-11-19 08:04:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 08:04:36,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:36,502 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:36,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-19 08:04:36,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-19 08:04:36,707 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:36,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:36,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1998378059, now seen corresponding path program 2 times [2022-11-19 08:04:36,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:36,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898715581] [2022-11-19 08:04:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:36,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:04:37,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898715581] [2022-11-19 08:04:37,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898715581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:37,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187932599] [2022-11-19 08:04:37,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:04:37,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:37,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:37,024 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:37,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 08:04:37,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:04:37,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:04:37,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 08:04:37,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:04:37,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:38,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-19 08:04:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 08:04:38,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187932599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:38,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883831541] [2022-11-19 08:04:38,158 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:04:38,158 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:38,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:38,158 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:38,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:39,048 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 10 treesize of output 9 [2022-11-19 08:04:39,053 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 [2022-11-19 08:04:39,090 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 7 treesize of output 6 [2022-11-19 08:04:39,181 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:04:39,181 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:04:39,207 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:04:39,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:04:39,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:39,324 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:39,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:39,437 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:39,539 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:04:39,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-19 08:04:39,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:39,629 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:39,630 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 25 treesize of output 25 [2022-11-19 08:04:39,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:39,665 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:39,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:39,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:39,771 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 34 treesize of output 26 [2022-11-19 08:04:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:39,829 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 36 treesize of output 28 [2022-11-19 08:04:39,986 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:04:40,014 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:04:40,015 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:44,098 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16543#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:04:44,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:04:44,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:44,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2022-11-19 08:04:44,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037099824] [2022-11-19 08:04:44,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:44,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 08:04:44,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:44,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 08:04:44,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2500, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:04:44,101 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-19 08:04:49,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:49,382 INFO L93 Difference]: Finished difference Result 270 states and 308 transitions. [2022-11-19 08:04:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-19 08:04:49,383 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 40 [2022-11-19 08:04:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:49,384 INFO L225 Difference]: With dead ends: 270 [2022-11-19 08:04:49,384 INFO L226 Difference]: Without dead ends: 270 [2022-11-19 08:04:49,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1404, Invalid=7716, Unknown=0, NotChecked=0, Total=9120 [2022-11-19 08:04:49,386 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1123 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:49,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 383 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:04:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-19 08:04:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 112. [2022-11-19 08:04:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 95 states have (on average 1.305263157894737) internal successors, (124), 103 states have internal predecessors, (124), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:04:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2022-11-19 08:04:49,390 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 40 [2022-11-19 08:04:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:49,391 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2022-11-19 08:04:49,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-19 08:04:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2022-11-19 08:04:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 08:04:49,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:49,392 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:49,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-19 08:04:49,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:49,598 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:49,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:49,598 INFO L85 PathProgramCache]: Analyzing trace with hash 732853998, now seen corresponding path program 2 times [2022-11-19 08:04:49,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:49,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219644922] [2022-11-19 08:04:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:49,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:04:49,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:49,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219644922] [2022-11-19 08:04:49,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219644922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:49,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565760547] [2022-11-19 08:04:49,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:04:49,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:49,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:49,691 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:49,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 08:04:49,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:04:49,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:04:49,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:04:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:04:49,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:04:49,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565760547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:49,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [430093030] [2022-11-19 08:04:49,943 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:04:49,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:49,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:49,944 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:49,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:50,233 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 [2022-11-19 08:04:50,238 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 10 treesize of output 9 [2022-11-19 08:04:50,278 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 7 treesize of output 6 [2022-11-19 08:04:50,369 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:04:50,370 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:04:50,402 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:04:50,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:04:50,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:50,530 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:50,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:50,650 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:50,751 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-19 08:04:50,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-19 08:04:50,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:50,846 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:50,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:50,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:50,899 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:50,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:50,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:50,938 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:50,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,034 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 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-19 08:04:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:51,148 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 36 treesize of output 28 [2022-11-19 08:04:51,255 INFO L321 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2022-11-19 08:04:51,255 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 36 treesize of output 44 [2022-11-19 08:04:51,425 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:04:51,460 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:04:51,468 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:04:54,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17291#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (or (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (not (<= 0 (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset|)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:04:54,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:04:54,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:04:54,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-19 08:04:54,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659025330] [2022-11-19 08:04:54,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:54,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:04:54,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:04:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:04:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:04:54,683 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:04:54,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:04:54,798 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2022-11-19 08:04:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:04:54,799 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-11-19 08:04:54,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:04:54,800 INFO L225 Difference]: With dead ends: 135 [2022-11-19 08:04:54,800 INFO L226 Difference]: Without dead ends: 135 [2022-11-19 08:04:54,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 08:04:54,800 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 136 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:04:54,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 207 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:04:54,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-19 08:04:54,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2022-11-19 08:04:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 95 states have internal predecessors, (112), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:04:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2022-11-19 08:04:54,804 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 42 [2022-11-19 08:04:54,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:04:54,804 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2022-11-19 08:04:54,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:04:54,804 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2022-11-19 08:04:54,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 08:04:54,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:04:54,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:04:54,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:55,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:55,011 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:04:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:55,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1600932628, now seen corresponding path program 1 times [2022-11-19 08:04:55,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:04:55,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744227928] [2022-11-19 08:04:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:55,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:04:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:04:55,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:04:55,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744227928] [2022-11-19 08:04:55,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744227928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:04:55,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980963592] [2022-11-19 08:04:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:04:55,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:55,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:55,201 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:55,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 08:04:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:04:55,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:04:55,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:04:55,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:04:55,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980963592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:55,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [430002263] [2022-11-19 08:04:55,604 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-19 08:04:55,604 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:04:55,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:04:55,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:04:55,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:04:55,917 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 10 treesize of output 9 [2022-11-19 08:04:55,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:04:55,964 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 7 treesize of output 6 [2022-11-19 08:04:56,052 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:04:56,053 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:04:56,083 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:04:56,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:04:56,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:56,182 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:56,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:04:56,275 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:04:56,396 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:04:56,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-19 08:04:56,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:56,473 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:56,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:56,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:04:56,512 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:04:56,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:04:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:56,594 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 36 treesize of output 28 [2022-11-19 08:04:56,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:56,680 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 36 treesize of output 28 [2022-11-19 08:04:56,796 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-19 08:04:56,796 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 36 treesize of output 56 [2022-11-19 08:04:56,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:04:56,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:56,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:56,985 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-19 08:04:56,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-19 08:04:57,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:57,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:04:57,049 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-19 08:04:57,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-11-19 08:04:57,202 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:04:57,203 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 33 treesize of output 45 [2022-11-19 08:04:57,288 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:04:57,289 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 69 treesize of output 77 [2022-11-19 08:04:57,432 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:04:57,432 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 33 treesize of output 45 [2022-11-19 08:04:57,518 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:04:57,519 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 69 treesize of output 77 [2022-11-19 08:04:57,804 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:04:57,828 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:04:57,829 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:06,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17824#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (= (select |#valid| |ULTIMATE.start_downsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 1)) (= (+ |ULTIMATE.start_downsweep_~left~1#1| |ULTIMATE.start_downsweep_~space#1|) |ULTIMATE.start_downsweep_~right~1#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (not (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4)) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|))) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 1)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (exists ((|v_ULTIMATE.start_downsweep_~left~1#1_31| Int)) (and (<= 0 (+ |ULTIMATE.start_downsweep_~a#1.offset| (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_31|))) (<= |v_ULTIMATE.start_downsweep_~left~1#1_31| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_31|))) |ULTIMATE.start_downsweep_~temp~0#1|) (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| (* 4 |v_ULTIMATE.start_downsweep_~left~1#1_31|) 4) (select |#length| |ULTIMATE.start_downsweep_~a#1.base|)))) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (< |ULTIMATE.start_downsweep_~right~1#1| |ULTIMATE.start_downsweep_~n#1|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= (* 8 |ULTIMATE.start_downsweep_~space#1|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~right~1#1| 4))) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (<= (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4)) (+ (select |#length| |ULTIMATE.start_downsweep_~a#1.base|) (* 8 |ULTIMATE.start_downsweep_~space#1|))) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:05:06,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:06,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:05:06,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-11-19 08:05:06,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697790466] [2022-11-19 08:05:06,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:06,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:05:06,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:06,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:05:06,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2035, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 08:05:06,689 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:05:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:07,003 INFO L93 Difference]: Finished difference Result 129 states and 147 transitions. [2022-11-19 08:05:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:05:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-19 08:05:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:07,004 INFO L225 Difference]: With dead ends: 129 [2022-11-19 08:05:07,005 INFO L226 Difference]: Without dead ends: 129 [2022-11-19 08:05:07,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=296, Invalid=2566, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 08:05:07,006 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 152 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:07,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 373 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:05:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-19 08:05:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2022-11-19 08:05:07,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 98 states have (on average 1.2755102040816326) internal successors, (125), 106 states have internal predecessors, (125), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:05:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2022-11-19 08:05:07,009 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 43 [2022-11-19 08:05:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:07,010 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2022-11-19 08:05:07,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:05:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2022-11-19 08:05:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 08:05:07,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:07,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:07,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:07,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-19 08:05:07,217 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:05:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:07,217 INFO L85 PathProgramCache]: Analyzing trace with hash 901566904, now seen corresponding path program 1 times [2022-11-19 08:05:07,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:07,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023281942] [2022-11-19 08:05:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:07,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:05:07,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:07,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023281942] [2022-11-19 08:05:07,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023281942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:07,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358380429] [2022-11-19 08:05:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:07,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:07,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:07,564 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:07,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 08:05:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:07,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:05:07,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:05:07,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:08,030 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 23 treesize of output 19 [2022-11-19 08:05:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:05:08,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358380429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:08,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970861741] [2022-11-19 08:05:08,112 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 08:05:08,112 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:08,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:08,113 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:08,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:08,314 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 10 treesize of output 9 [2022-11-19 08:05:08,321 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 [2022-11-19 08:05:08,359 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 7 treesize of output 6 [2022-11-19 08:05:08,460 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:05:08,460 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:05:08,486 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:05:08,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:05:08,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:05:08,602 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:08,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:05:08,704 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:08,800 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-19 08:05:08,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-19 08:05:08,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:08,886 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:05:08,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:05:08,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:08,946 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:05:08,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:05:08,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:08,980 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:05:08,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:05:09,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:09,059 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 36 treesize of output 28 [2022-11-19 08:05:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:09,141 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 36 treesize of output 28 [2022-11-19 08:05:09,258 INFO L321 Elim1Store]: treesize reduction 29, result has 59.7 percent of original size [2022-11-19 08:05:09,258 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 36 treesize of output 56 [2022-11-19 08:05:09,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:05:09,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:09,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:09,501 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-19 08:05:09,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-19 08:05:09,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:09,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:09,564 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-19 08:05:09,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-11-19 08:05:09,682 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:09,682 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 33 treesize of output 45 [2022-11-19 08:05:09,755 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:09,756 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 69 treesize of output 77 [2022-11-19 08:05:09,880 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:09,881 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 33 treesize of output 45 [2022-11-19 08:05:09,966 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:09,967 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 69 treesize of output 77 [2022-11-19 08:05:10,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:10,323 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 45 treesize of output 28 [2022-11-19 08:05:10,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:10,377 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 40 treesize of output 31 [2022-11-19 08:05:10,574 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-19 08:05:10,575 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 172 treesize of output 147 [2022-11-19 08:05:10,646 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-19 08:05:10,647 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 192 treesize of output 164 [2022-11-19 08:05:10,834 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:10,834 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 33 treesize of output 45 [2022-11-19 08:05:10,899 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:10,899 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 69 treesize of output 77 [2022-11-19 08:05:11,028 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:11,029 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 33 treesize of output 45 [2022-11-19 08:05:11,102 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:11,103 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 69 treesize of output 77 [2022-11-19 08:05:11,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:11,519 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 45 treesize of output 28 [2022-11-19 08:05:11,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:11,565 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 38 treesize of output 29 [2022-11-19 08:05:11,694 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-19 08:05:11,695 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 158 treesize of output 133 [2022-11-19 08:05:11,788 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-19 08:05:11,788 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 178 treesize of output 150 [2022-11-19 08:05:11,975 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:11,976 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 33 treesize of output 45 [2022-11-19 08:05:12,054 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:12,055 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 69 treesize of output 77 [2022-11-19 08:05:12,184 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:12,184 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 33 treesize of output 45 [2022-11-19 08:05:12,294 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:12,295 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 69 treesize of output 77 [2022-11-19 08:05:12,589 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:05:12,616 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:05:12,617 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:21,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18394#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (not (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|))) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:05:21,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:21,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:05:21,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2022-11-19 08:05:21,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450893906] [2022-11-19 08:05:21,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:21,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:05:21,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:21,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:05:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 08:05:21,820 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:05:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:22,416 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2022-11-19 08:05:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:05:22,417 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-11-19 08:05:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:22,417 INFO L225 Difference]: With dead ends: 132 [2022-11-19 08:05:22,417 INFO L226 Difference]: Without dead ends: 132 [2022-11-19 08:05:22,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=597, Invalid=3185, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 08:05:22,418 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 352 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:22,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 132 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:22,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-19 08:05:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 122. [2022-11-19 08:05:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 113 states have internal predecessors, (136), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:05:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2022-11-19 08:05:22,422 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 45 [2022-11-19 08:05:22,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:22,423 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2022-11-19 08:05:22,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 08:05:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2022-11-19 08:05:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:05:22,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:22,424 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:22,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:22,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:22,629 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:05:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:22,629 INFO L85 PathProgramCache]: Analyzing trace with hash -540006496, now seen corresponding path program 3 times [2022-11-19 08:05:22,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:22,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800037975] [2022-11-19 08:05:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:22,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:05:22,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:22,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800037975] [2022-11-19 08:05:22,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800037975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:22,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032468405] [2022-11-19 08:05:22,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:05:22,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:22,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:22,925 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:22,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-19 08:05:23,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:05:23,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:05:23,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:05:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:05:23,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:23,535 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 29 treesize of output 25 [2022-11-19 08:05:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 08:05:23,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032468405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:23,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139551084] [2022-11-19 08:05:23,790 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:05:23,790 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:23,790 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:23,791 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:23,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:24,022 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 10 treesize of output 9 [2022-11-19 08:05:24,031 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 [2022-11-19 08:05:24,067 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 7 treesize of output 6 [2022-11-19 08:05:24,180 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:05:24,180 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:05:24,208 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:05:24,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:05:24,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:05:24,314 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:24,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:05:24,407 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:24,498 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:05:24,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-19 08:05:24,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:24,576 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:05:24,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:05:24,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:24,620 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:05:24,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:05:24,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,736 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 36 treesize of output 28 [2022-11-19 08:05:24,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,858 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 36 treesize of output 28 [2022-11-19 08:05:24,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:24,966 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 36 treesize of output 28 [2022-11-19 08:05:25,159 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:05:25,184 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:05:25,185 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:29,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19002#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:05:29,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:29,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:05:29,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-11-19 08:05:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230374329] [2022-11-19 08:05:29,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:29,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 08:05:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 08:05:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2563, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 08:05:29,673 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 08:05:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:33,348 INFO L93 Difference]: Finished difference Result 457 states and 553 transitions. [2022-11-19 08:05:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-19 08:05:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-11-19 08:05:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:33,350 INFO L225 Difference]: With dead ends: 457 [2022-11-19 08:05:33,350 INFO L226 Difference]: Without dead ends: 457 [2022-11-19 08:05:33,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2581 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1116, Invalid=7440, Unknown=0, NotChecked=0, Total=8556 [2022-11-19 08:05:33,351 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 962 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:33,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 529 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:05:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-19 08:05:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 124. [2022-11-19 08:05:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 107 states have (on average 1.2990654205607477) internal successors, (139), 115 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:05:33,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2022-11-19 08:05:33,357 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 46 [2022-11-19 08:05:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:33,357 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2022-11-19 08:05:33,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 08:05:33,358 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2022-11-19 08:05:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 08:05:33,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:33,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:33,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:33,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-19 08:05:33,570 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:05:33,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:33,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2116110673, now seen corresponding path program 1 times [2022-11-19 08:05:33,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:33,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712201317] [2022-11-19 08:05:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:33,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:05:33,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:33,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712201317] [2022-11-19 08:05:33,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712201317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:33,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061573115] [2022-11-19 08:05:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:33,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:33,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:33,741 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:33,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-19 08:05:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:33,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:05:33,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:05:33,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:05:34,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061573115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:34,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1850397681] [2022-11-19 08:05:34,070 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-19 08:05:34,070 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:34,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:34,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:34,071 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:34,367 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 [2022-11-19 08:05:34,379 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 10 treesize of output 9 [2022-11-19 08:05:34,414 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 7 treesize of output 6 [2022-11-19 08:05:34,502 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:05:34,502 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:05:34,529 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:05:34,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:05:34,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:05:34,644 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:34,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:05:34,733 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:34,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:05:34,876 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:05:34,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 266 treesize of output 263 [2022-11-19 08:05:34,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:34,966 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:05:34,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:05:34,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:35,004 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:05:35,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:05:35,238 INFO L321 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2022-11-19 08:05:35,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 280 treesize of output 301 [2022-11-19 08:05:35,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:35,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:35,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:35,589 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:05:35,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 68 [2022-11-19 08:05:35,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:35,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:35,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:35,766 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:05:35,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 269 treesize of output 292 [2022-11-19 08:05:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:35,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:35,893 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:05:35,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 271 treesize of output 304 [2022-11-19 08:05:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:36,044 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:05:36,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 80 [2022-11-19 08:05:36,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:36,229 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 36 treesize of output 28 [2022-11-19 08:05:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:36,317 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 36 treesize of output 28 [2022-11-19 08:05:36,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:05:36,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:36,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:36,551 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-19 08:05:36,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-19 08:05:36,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:36,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:36,622 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 08:05:36,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 52 [2022-11-19 08:05:36,772 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:36,772 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 33 treesize of output 45 [2022-11-19 08:05:36,846 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:36,846 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 69 treesize of output 77 [2022-11-19 08:05:36,988 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:36,988 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 33 treesize of output 45 [2022-11-19 08:05:37,066 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:37,067 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 69 treesize of output 77 [2022-11-19 08:05:37,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,210 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 45 treesize of output 28 [2022-11-19 08:05:37,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:37,256 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 40 treesize of output 31 [2022-11-19 08:05:37,401 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-19 08:05:37,401 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 158 treesize of output 133 [2022-11-19 08:05:37,487 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-19 08:05:37,487 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 178 treesize of output 150 [2022-11-19 08:05:37,684 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:37,684 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 33 treesize of output 45 [2022-11-19 08:05:37,758 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:37,758 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 69 treesize of output 77 [2022-11-19 08:05:37,889 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:37,889 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 33 treesize of output 45 [2022-11-19 08:05:37,973 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:37,974 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 69 treesize of output 77 [2022-11-19 08:05:38,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,463 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 45 treesize of output 28 [2022-11-19 08:05:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:38,505 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 38 treesize of output 29 [2022-11-19 08:05:38,651 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-19 08:05:38,651 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 158 treesize of output 133 [2022-11-19 08:05:38,728 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-19 08:05:38,729 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 178 treesize of output 150 [2022-11-19 08:05:38,918 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:38,918 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 33 treesize of output 45 [2022-11-19 08:05:38,986 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:38,987 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 69 treesize of output 77 [2022-11-19 08:05:39,136 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:05:39,136 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 33 treesize of output 45 [2022-11-19 08:05:39,212 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:05:39,212 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 69 treesize of output 77 [2022-11-19 08:05:39,416 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:05:39,444 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:05:39,445 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:48,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19966#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_downsweep_~space#1| 0) (<= |ULTIMATE.start_check_~n#1| |ULTIMATE.start_check_~i~0#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (not (< |ULTIMATE.start_main_~a~0#1.base| |#StackHeapBarrier|)) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~n~0#1| 2147483648)))' at error location [2022-11-19 08:05:48,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:48,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:05:48,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-11-19 08:05:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436060271] [2022-11-19 08:05:48,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:48,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:05:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:05:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:05:48,711 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:05:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:48,888 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2022-11-19 08:05:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:05:48,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-11-19 08:05:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:48,889 INFO L225 Difference]: With dead ends: 127 [2022-11-19 08:05:48,889 INFO L226 Difference]: Without dead ends: 127 [2022-11-19 08:05:48,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 08:05:48,890 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 115 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:48,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 187 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:05:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-19 08:05:48,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2022-11-19 08:05:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 107 states have (on average 1.280373831775701) internal successors, (137), 115 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:05:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2022-11-19 08:05:48,894 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 46 [2022-11-19 08:05:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:48,894 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2022-11-19 08:05:48,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:05:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2022-11-19 08:05:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:05:48,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:48,895 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:48,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-19 08:05:49,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:49,101 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:05:49,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:49,101 INFO L85 PathProgramCache]: Analyzing trace with hash 444245892, now seen corresponding path program 1 times [2022-11-19 08:05:49,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:49,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430859181] [2022-11-19 08:05:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:49,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 08:05:49,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:49,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430859181] [2022-11-19 08:05:49,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430859181] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:49,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825843346] [2022-11-19 08:05:49,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:49,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:49,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:49,257 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:49,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 08:05:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:49,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:05:49,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:05:49,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:05:49,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825843346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:49,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056315098] [2022-11-19 08:05:49,715 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:05:49,715 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:05:49,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:05:49,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:05:49,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:05:49,954 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 10 treesize of output 9 [2022-11-19 08:05:49,962 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 [2022-11-19 08:05:49,992 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 7 treesize of output 6 [2022-11-19 08:05:50,076 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:05:50,077 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:05:50,102 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:05:50,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:05:50,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:05:50,218 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:50,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:05:50,327 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:50,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:05:50,481 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:05:50,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 266 treesize of output 263 [2022-11-19 08:05:50,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:50,567 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:05:50,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:05:50,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:50,602 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:05:50,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:05:50,843 INFO L321 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2022-11-19 08:05:50,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 280 treesize of output 301 [2022-11-19 08:05:50,997 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:51,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:51,054 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:05:51,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 80 [2022-11-19 08:05:51,096 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:05:51,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:51,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:51,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:51,167 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:05:51,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 68 [2022-11-19 08:05:51,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:51,287 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 36 treesize of output 28 [2022-11-19 08:05:51,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:05:51,361 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 36 treesize of output 28 [2022-11-19 08:05:51,528 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:05:51,552 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:05:51,553 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:05:55,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20558#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_~space~0#1|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:05:55,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:05:55,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:05:55,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-11-19 08:05:55,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137738694] [2022-11-19 08:05:55,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:05:55,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:05:55,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:05:55,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:05:55,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1764, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:05:55,453 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:05:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:56,220 INFO L93 Difference]: Finished difference Result 197 states and 226 transitions. [2022-11-19 08:05:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 08:05:56,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-11-19 08:05:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:56,221 INFO L225 Difference]: With dead ends: 197 [2022-11-19 08:05:56,221 INFO L226 Difference]: Without dead ends: 197 [2022-11-19 08:05:56,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=590, Invalid=3442, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 08:05:56,221 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 718 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:56,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 476 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:05:56,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-19 08:05:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 128. [2022-11-19 08:05:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 111 states have (on average 1.2612612612612613) internal successors, (140), 119 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:05:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2022-11-19 08:05:56,225 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 47 [2022-11-19 08:05:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:56,225 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2022-11-19 08:05:56,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0434782608695654) internal successors, (70), 23 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:05:56,225 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2022-11-19 08:05:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 08:05:56,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:56,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:56,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:56,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:56,432 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:05:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1177533864, now seen corresponding path program 1 times [2022-11-19 08:05:56,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:05:56,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474527713] [2022-11-19 08:05:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:56,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:05:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:05:59,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:05:59,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474527713] [2022-11-19 08:05:59,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474527713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:05:59,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096961171] [2022-11-19 08:05:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:05:59,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:05:59,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:05:59,071 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:05:59,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-19 08:05:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:05:59,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-19 08:05:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:59,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:05:59,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:05:59,759 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 25 treesize of output 7 [2022-11-19 08:05:59,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:06:00,043 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 08:06:00,044 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 36 treesize of output 23 [2022-11-19 08:06:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:06:00,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:00,204 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 36 treesize of output 32 [2022-11-19 08:06:00,632 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 20 treesize of output 18 [2022-11-19 08:06:00,637 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 27 treesize of output 20 [2022-11-19 08:06:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:06:00,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096961171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:00,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1566541666] [2022-11-19 08:06:00,943 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 08:06:00,943 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:06:00,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:06:00,944 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:06:00,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:06:01,191 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 [2022-11-19 08:06:01,197 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 10 treesize of output 9 [2022-11-19 08:06:01,229 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 7 treesize of output 6 [2022-11-19 08:06:01,320 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:06:01,321 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:06:01,349 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:06:01,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:06:01,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:06:01,455 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:01,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:06:01,572 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:01,665 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:06:01,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-19 08:06:01,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:01,748 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:06:01,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:06:01,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:01,784 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:06:01,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:06:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:01,863 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 34 treesize of output 26 [2022-11-19 08:06:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:01,932 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 36 treesize of output 28 [2022-11-19 08:06:02,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:02,013 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 36 treesize of output 28 [2022-11-19 08:06:02,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:06:02,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:02,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:02,261 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-19 08:06:02,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-19 08:06:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:02,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:02,329 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-19 08:06:02,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-11-19 08:06:02,472 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:02,473 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 33 treesize of output 45 [2022-11-19 08:06:02,566 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:02,566 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 69 treesize of output 77 [2022-11-19 08:06:02,693 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:02,693 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 33 treesize of output 45 [2022-11-19 08:06:02,760 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:02,760 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 69 treesize of output 77 [2022-11-19 08:06:02,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:02,925 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 45 treesize of output 28 [2022-11-19 08:06:02,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:02,977 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 40 treesize of output 31 [2022-11-19 08:06:03,138 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:03,138 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 33 treesize of output 45 [2022-11-19 08:06:03,229 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:03,229 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 69 treesize of output 77 [2022-11-19 08:06:03,427 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:03,428 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 33 treesize of output 45 [2022-11-19 08:06:03,532 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:03,532 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 69 treesize of output 77 [2022-11-19 08:06:03,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:03,693 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 45 treesize of output 28 [2022-11-19 08:06:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:03,753 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 38 treesize of output 29 [2022-11-19 08:06:03,865 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:03,865 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 33 treesize of output 45 [2022-11-19 08:06:03,946 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:03,947 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 69 treesize of output 77 [2022-11-19 08:06:04,069 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:04,070 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 33 treesize of output 45 [2022-11-19 08:06:04,148 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:04,148 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 69 treesize of output 77 [2022-11-19 08:06:04,446 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:06:04,472 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:06:04,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:06:15,826 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21266#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 |#NULL.base|) (= (ite (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc16#1.offset|) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc15#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc16#1.offset| 0))' at error location [2022-11-19 08:06:15,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:06:15,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:06:15,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 14] total 47 [2022-11-19 08:06:15,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139653574] [2022-11-19 08:06:15,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:06:15,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-19 08:06:15,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:15,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-19 08:06:15,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=5763, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 08:06:15,828 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand has 47 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 45 states have internal predecessors, (86), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:06:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:23,219 INFO L93 Difference]: Finished difference Result 165 states and 189 transitions. [2022-11-19 08:06:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 08:06:23,220 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 45 states have internal predecessors, (86), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2022-11-19 08:06:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:23,220 INFO L225 Difference]: With dead ends: 165 [2022-11-19 08:06:23,220 INFO L226 Difference]: Without dead ends: 165 [2022-11-19 08:06:23,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=728, Invalid=10192, Unknown=0, NotChecked=0, Total=10920 [2022-11-19 08:06:23,222 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 270 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:23,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 352 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1170 Invalid, 0 Unknown, 159 Unchecked, 1.3s Time] [2022-11-19 08:06:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-19 08:06:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 140. [2022-11-19 08:06:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 123 states have (on average 1.2520325203252032) internal successors, (154), 131 states have internal predecessors, (154), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:06:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2022-11-19 08:06:23,226 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 47 [2022-11-19 08:06:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:23,226 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2022-11-19 08:06:23,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 45 states have internal predecessors, (86), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:06:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2022-11-19 08:06:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 08:06:23,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:23,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:23,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-19 08:06:23,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-19 08:06:23,433 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:06:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2143807263, now seen corresponding path program 1 times [2022-11-19 08:06:23,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:23,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422628500] [2022-11-19 08:06:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:23,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:06:23,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:23,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422628500] [2022-11-19 08:06:23,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422628500] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:23,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037996320] [2022-11-19 08:06:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:23,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:23,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:23,813 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:23,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-19 08:06:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:23,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:06:23,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:06:24,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:24,327 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 23 treesize of output 19 [2022-11-19 08:06:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:06:24,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037996320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:24,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408696455] [2022-11-19 08:06:24,404 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2022-11-19 08:06:24,404 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:06:24,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:06:24,405 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:06:24,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:06:24,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:06:24,600 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 10 treesize of output 9 [2022-11-19 08:06:24,631 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 7 treesize of output 6 [2022-11-19 08:06:24,713 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:06:24,714 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:06:24,741 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:06:24,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:06:24,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:06:24,840 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:24,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:06:24,939 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:24,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-19 08:06:25,135 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:06:25,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 259 treesize of output 256 [2022-11-19 08:06:25,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:25,229 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:06:25,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:06:25,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:25,267 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:06:25,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:06:25,555 INFO L321 Elim1Store]: treesize reduction 72, result has 32.7 percent of original size [2022-11-19 08:06:25,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 280 treesize of output 301 [2022-11-19 08:06:25,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:25,877 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:06:25,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 271 treesize of output 304 [2022-11-19 08:06:25,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:25,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,027 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:06:26,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 80 [2022-11-19 08:06:26,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:26,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,134 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:06:26,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 68 [2022-11-19 08:06:26,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:26,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,235 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:06:26,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 269 treesize of output 292 [2022-11-19 08:06:26,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,483 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 36 treesize of output 28 [2022-11-19 08:06:26,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,559 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 36 treesize of output 28 [2022-11-19 08:06:26,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:06:26,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,787 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-19 08:06:26,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-19 08:06:26,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:26,853 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-19 08:06:26,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 60 [2022-11-19 08:06:27,003 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:27,003 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 33 treesize of output 45 [2022-11-19 08:06:27,074 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:27,074 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 69 treesize of output 77 [2022-11-19 08:06:27,202 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:27,202 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 33 treesize of output 45 [2022-11-19 08:06:27,282 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:27,282 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 69 treesize of output 77 [2022-11-19 08:06:27,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:27,418 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 45 treesize of output 28 [2022-11-19 08:06:27,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:27,466 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 40 treesize of output 31 [2022-11-19 08:06:27,590 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-19 08:06:27,591 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 172 treesize of output 147 [2022-11-19 08:06:27,672 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-19 08:06:27,672 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 192 treesize of output 164 [2022-11-19 08:06:27,879 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:27,880 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 33 treesize of output 45 [2022-11-19 08:06:27,943 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:27,943 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 69 treesize of output 77 [2022-11-19 08:06:28,065 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:28,066 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 33 treesize of output 45 [2022-11-19 08:06:28,147 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:28,147 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 69 treesize of output 77 [2022-11-19 08:06:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:28,477 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 45 treesize of output 28 [2022-11-19 08:06:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:28,520 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 40 treesize of output 31 [2022-11-19 08:06:28,706 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2022-11-19 08:06:28,706 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 172 treesize of output 147 [2022-11-19 08:06:28,802 INFO L321 Elim1Store]: treesize reduction 56, result has 20.0 percent of original size [2022-11-19 08:06:28,803 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 192 treesize of output 164 [2022-11-19 08:06:29,018 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:29,019 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 33 treesize of output 45 [2022-11-19 08:06:29,093 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:29,093 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 69 treesize of output 77 [2022-11-19 08:06:29,228 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:06:29,228 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 33 treesize of output 45 [2022-11-19 08:06:29,307 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:06:29,307 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 69 treesize of output 77 [2022-11-19 08:06:29,570 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:06:29,598 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:06:29,599 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:06:40,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21954#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (< |ULTIMATE.start_check_~i~0#1| |ULTIMATE.start_check_~n#1|) (<= 0 (+ |ULTIMATE.start_downsweep_~n#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_#in~n#1| 2147483648)) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (<= |ULTIMATE.start_downsweep_~n#1| 2147483647) (not (< 0 |ULTIMATE.start_downsweep_~space#1|)) (<= 0 |ULTIMATE.start_downsweep_~a#1.offset|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_upsweep_~n#1| 2147483648)) (<= 0 |ULTIMATE.start_downsweep_#in~a#1.offset|) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= (ite (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= |ULTIMATE.start_downsweep_~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_upsweep_#in~n#1| 2147483648)) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_~space~0#1| 2147483648)) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_check_~i~0#1| 4) 4 |ULTIMATE.start_check_~a0#1.offset|) (select |#length| |ULTIMATE.start_check_~a0#1.base|))) (<= |ULTIMATE.start_upsweep_~space~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_downsweep_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (<= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:06:40,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:06:40,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:06:40,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-19 08:06:40,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696336341] [2022-11-19 08:06:40,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:06:40,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:06:40,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:40,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:06:40,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2132, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 08:06:40,910 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 08:06:41,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:41,234 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2022-11-19 08:06:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:06:41,234 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-11-19 08:06:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:41,235 INFO L225 Difference]: With dead ends: 147 [2022-11-19 08:06:41,235 INFO L226 Difference]: Without dead ends: 147 [2022-11-19 08:06:41,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 08:06:41,236 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 272 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:41,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 125 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:06:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-19 08:06:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2022-11-19 08:06:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 126 states have (on average 1.246031746031746) internal successors, (157), 134 states have internal predecessors, (157), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:06:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2022-11-19 08:06:41,239 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 48 [2022-11-19 08:06:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:41,239 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2022-11-19 08:06:41,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 08:06:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2022-11-19 08:06:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 08:06:41,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:41,241 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:41,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:41,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-19 08:06:41,446 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:06:41,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:41,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1502172590, now seen corresponding path program 4 times [2022-11-19 08:06:41,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:41,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929629409] [2022-11-19 08:06:41,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:41,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:06:41,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:41,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929629409] [2022-11-19 08:06:41,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929629409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:41,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133640761] [2022-11-19 08:06:41,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:06:41,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:41,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:41,695 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:41,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 08:06:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:41,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:06:41,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:06:42,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:06:42,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133640761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:42,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [902570309] [2022-11-19 08:06:42,193 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:06:42,193 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:06:42,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:06:42,193 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:06:42,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:06:42,432 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 10 treesize of output 9 [2022-11-19 08:06:42,444 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 [2022-11-19 08:06:42,477 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 7 treesize of output 6 [2022-11-19 08:06:42,568 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:06:42,569 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:06:42,596 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:06:42,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:06:42,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:06:42,690 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:42,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:06:42,774 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:42,867 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-19 08:06:42,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-19 08:06:42,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:42,951 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:06:42,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:06:42,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:42,999 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:06:42,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:06:43,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:43,034 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:06:43,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:06:43,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:43,113 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 34 treesize of output 26 [2022-11-19 08:06:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:43,190 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 36 treesize of output 28 [2022-11-19 08:06:43,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:43,260 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 36 treesize of output 28 [2022-11-19 08:06:43,401 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:06:43,425 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:06:43,426 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:06:47,475 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22605#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:06:47,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:06:47,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:06:47,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-11-19 08:06:47,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841278759] [2022-11-19 08:06:47,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:06:47,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:06:47,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:47,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:06:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:06:47,476 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:06:47,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:47,957 INFO L93 Difference]: Finished difference Result 239 states and 272 transitions. [2022-11-19 08:06:47,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 08:06:47,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2022-11-19 08:06:47,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:47,959 INFO L225 Difference]: With dead ends: 239 [2022-11-19 08:06:47,959 INFO L226 Difference]: Without dead ends: 239 [2022-11-19 08:06:47,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=314, Invalid=2442, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 08:06:47,960 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 452 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:47,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 486 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:06:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-19 08:06:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 173. [2022-11-19 08:06:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 156 states have (on average 1.2435897435897436) internal successors, (194), 164 states have internal predecessors, (194), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:06:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 202 transitions. [2022-11-19 08:06:47,964 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 202 transitions. Word has length 50 [2022-11-19 08:06:47,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:47,964 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 202 transitions. [2022-11-19 08:06:47,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:06:47,965 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 202 transitions. [2022-11-19 08:06:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 08:06:47,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:47,965 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:47,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:48,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:48,173 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:06:48,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash 681868050, now seen corresponding path program 2 times [2022-11-19 08:06:48,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:06:48,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49264988] [2022-11-19 08:06:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:48,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:06:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 08:06:48,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:06:48,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49264988] [2022-11-19 08:06:48,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49264988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:48,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894827636] [2022-11-19 08:06:48,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:06:48,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:48,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:48,425 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:48,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 08:06:48,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:06:48,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:06:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-19 08:06:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:48,711 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 [2022-11-19 08:06:49,408 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:06:49,409 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 20 treesize of output 22 [2022-11-19 08:06:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 08:06:51,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:52,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894827636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:06:52,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029391514] [2022-11-19 08:06:52,123 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:06:52,124 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:06:52,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:06:52,124 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:06:52,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:06:52,421 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 [2022-11-19 08:06:52,433 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 10 treesize of output 9 [2022-11-19 08:06:52,472 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 7 treesize of output 6 [2022-11-19 08:06:52,555 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:06:52,556 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:06:52,583 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:06:52,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:06:52,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:06:52,711 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:52,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:06:52,810 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:06:52,900 INFO L321 Elim1Store]: treesize reduction 28, result has 15.2 percent of original size [2022-11-19 08:06:52,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 200 treesize of output 196 [2022-11-19 08:06:52,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:52,977 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:06:52,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:06:53,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:06:53,013 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:06:53,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:06:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:53,084 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 34 treesize of output 26 [2022-11-19 08:06:53,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:53,159 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 36 treesize of output 28 [2022-11-19 08:06:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:06:53,231 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 36 treesize of output 28 [2022-11-19 08:06:53,394 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:06:53,419 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:06:53,420 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:06:57,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23355#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_~space~0#1|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (not (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:06:57,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:06:57,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:06:57,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-11-19 08:06:57,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606575655] [2022-11-19 08:06:57,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:06:57,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:06:57,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:06:57,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:06:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2808, Unknown=2, NotChecked=0, Total=3080 [2022-11-19 08:06:57,756 INFO L87 Difference]: Start difference. First operand 173 states and 202 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 08:07:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:00,616 INFO L93 Difference]: Finished difference Result 231 states and 263 transitions. [2022-11-19 08:07:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 08:07:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2022-11-19 08:07:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:00,618 INFO L225 Difference]: With dead ends: 231 [2022-11-19 08:07:00,618 INFO L226 Difference]: Without dead ends: 231 [2022-11-19 08:07:00,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=938, Invalid=6370, Unknown=2, NotChecked=0, Total=7310 [2022-11-19 08:07:00,619 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 907 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:00,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 156 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 420 Invalid, 0 Unknown, 271 Unchecked, 0.4s Time] [2022-11-19 08:07:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-19 08:07:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 169. [2022-11-19 08:07:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 153 states have (on average 1.2222222222222223) internal successors, (187), 160 states have internal predecessors, (187), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:07:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 195 transitions. [2022-11-19 08:07:00,624 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 195 transitions. Word has length 51 [2022-11-19 08:07:00,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:00,624 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 195 transitions. [2022-11-19 08:07:00,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 08:07:00,624 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 195 transitions. [2022-11-19 08:07:00,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 08:07:00,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:00,625 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:00,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:00,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:00,831 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:07:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash -744343327, now seen corresponding path program 3 times [2022-11-19 08:07:00,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:00,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170594034] [2022-11-19 08:07:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:00,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:07:01,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:01,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170594034] [2022-11-19 08:07:01,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170594034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:07:01,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993634189] [2022-11-19 08:07:01,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:07:01,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:01,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:01,169 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:01,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 08:07:01,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:07:01,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:07:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:07:01,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:07:01,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 08:07:01,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993634189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:01,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1815632045] [2022-11-19 08:07:01,588 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 08:07:01,588 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:07:01,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:07:01,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:07:01,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:07:01,873 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 10 treesize of output 9 [2022-11-19 08:07:01,885 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 [2022-11-19 08:07:01,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-19 08:07:02,013 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:07:02,013 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:07:02,039 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:07:02,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:07:02,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:07:02,156 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:07:02,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:07:02,266 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:07:02,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:07:02,413 INFO L321 Elim1Store]: treesize reduction 84, result has 9.7 percent of original size [2022-11-19 08:07:02,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 272 treesize of output 269 [2022-11-19 08:07:02,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:07:02,511 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:07:02,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:07:02,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:07:02,558 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:07:02,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:07:02,824 INFO L321 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2022-11-19 08:07:02,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 case distinctions, treesize of input 285 treesize of output 306 [2022-11-19 08:07:03,005 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:07:03,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:07:03,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:03,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:03,063 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:07:03,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 70 [2022-11-19 08:07:03,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:03,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:03,186 INFO L321 Elim1Store]: treesize reduction 28, result has 60.6 percent of original size [2022-11-19 08:07:03,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 82 [2022-11-19 08:07:03,226 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:07:03,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:07:03,317 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 36 treesize of output 28 [2022-11-19 08:07:03,456 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:07:03,482 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:07:03,483 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:07:08,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24167#(and (<= 0 |ULTIMATE.start_upsweep_#in~a#1.offset|) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_upsweep_~a#1.offset|) (<= 1 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_is_pow2_#res#1|) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 0 (+ |ULTIMATE.start_is_pow2_#in~x#1| 2147483648)) (= (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) |ULTIMATE.start_upsweep_#t~mem5#1|) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_upsweep_#in~n#1| 2147483647) (<= 0 (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~a#1.offset|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_upsweep_~n#1| 2147483647) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (< |ULTIMATE.start_upsweep_~left~0#1| |ULTIMATE.start_upsweep_~n#1|) (<= 0 |ULTIMATE.start_main_~a0~0#1.offset|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_is_pow2_#in~x#1| 2147483647) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= |ULTIMATE.start_main_~a0~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) |ULTIMATE.start_upsweep_~a#1.offset| 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:07:08,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:07:08,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:07:08,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 23 [2022-11-19 08:07:08,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578906480] [2022-11-19 08:07:08,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:07:08,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:07:08,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:07:08,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:07:08,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1786, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:07:08,174 INFO L87 Difference]: Start difference. First operand 169 states and 195 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:07:08,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:07:08,807 INFO L93 Difference]: Finished difference Result 220 states and 249 transitions. [2022-11-19 08:07:08,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 08:07:08,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2022-11-19 08:07:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:07:08,809 INFO L225 Difference]: With dead ends: 220 [2022-11-19 08:07:08,809 INFO L226 Difference]: Without dead ends: 220 [2022-11-19 08:07:08,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=346, Invalid=2846, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 08:07:08,810 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 391 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:07:08,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 372 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:07:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-19 08:07:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 159. [2022-11-19 08:07:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 143 states have (on average 1.2097902097902098) internal successors, (173), 150 states have internal predecessors, (173), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:07:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 181 transitions. [2022-11-19 08:07:08,814 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 181 transitions. Word has length 52 [2022-11-19 08:07:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:07:08,814 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 181 transitions. [2022-11-19 08:07:08,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:07:08,814 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 181 transitions. [2022-11-19 08:07:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 08:07:08,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:07:08,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:07:08,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-19 08:07:09,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:09,025 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-11-19 08:07:09,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:07:09,025 INFO L85 PathProgramCache]: Analyzing trace with hash 99439032, now seen corresponding path program 1 times [2022-11-19 08:07:09,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:07:09,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665247838] [2022-11-19 08:07:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:09,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:07:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:07:12,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:07:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665247838] [2022-11-19 08:07:12,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665247838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:07:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513897771] [2022-11-19 08:07:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:07:12,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:12,391 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:12,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b08e2a2-b326-441d-97d3-6aa835fce11c/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-19 08:07:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:07:12,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-19 08:07:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:12,552 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 [2022-11-19 08:07:12,633 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 7 treesize of output 6 [2022-11-19 08:07:12,757 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:07:12,758 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 [2022-11-19 08:07:12,811 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1178 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_1178) |c_#memory_int|)) is different from true [2022-11-19 08:07:12,819 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 13 treesize of output 15 [2022-11-19 08:07:12,951 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 22 treesize of output 20 [2022-11-19 08:07:12,956 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 12 treesize of output 11 [2022-11-19 08:07:13,112 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 33 treesize of output 29 [2022-11-19 08:07:13,124 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-19 08:07:13,125 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 21 treesize of output 25 [2022-11-19 08:07:13,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 08:07:13,883 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-11-19 08:07:17,901 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2022-11-19 08:07:18,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 106 [2022-11-19 08:07:21,727 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 141 treesize of output 123 [2022-11-19 08:07:21,734 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 63 treesize of output 57 [2022-11-19 08:07:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2022-11-19 08:07:21,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:49,554 WARN L233 SmtUtils]: Spent 8.22s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:10:58,807 WARN L233 SmtUtils]: Spent 10.44s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:12:46,656 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:12:49,027 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|)) (.cse6 (* |c_ULTIMATE.start_main_~i~1#1| 4)) (.cse7 (+ |c_ULTIMATE.start_main_~i~1#1| 1))) (and (forall ((|v_ULTIMATE.start_main_~i~1#1_286| Int)) (or (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_82| Int) (|v_ULTIMATE.start_downsweep_~n#1_32| Int) (v_ArrVal_1185 Int) (v_ArrVal_1184 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_44| Int) (v_ArrVal_1181 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store .cse5 (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse6) |c_ULTIMATE.start_main_#t~mem18#1|) (+ |ULTIMATE.start_main_~a0~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~1#1_286|)) v_ArrVal_1181)))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_82| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_44|) v_ArrVal_1184) (+ (* |v_ULTIMATE.start_downsweep_~n#1_32| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1185))) (let ((.cse4 (select .cse1 .cse2))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_44| |c_ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse3 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4))) (<= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse3)) (not (= .cse4 0)) (< |v_ULTIMATE.start_downsweep_~n#1_32| (+ 1 |v_ULTIMATE.start_main_~i~1#1_286|)) (< |v_ULTIMATE.start_upsweep_~right~0#1_82| 1)))))) (not (<= .cse7 |v_ULTIMATE.start_main_~i~1#1_286|)))) (forall ((|v_ULTIMATE.start_main_~i~1#1_286| Int)) (or (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_82| Int) (|v_ULTIMATE.start_downsweep_~n#1_32| Int) (v_ArrVal_1185 Int) (v_ArrVal_1184 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_44| Int) (v_ArrVal_1181 Int)) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store .cse5 (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse6) |c_ULTIMATE.start_main_#t~mem18#1|) (+ |ULTIMATE.start_main_~a0~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~1#1_286|)) v_ArrVal_1181)))) (let ((.cse11 (store (store (select .cse10 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_82| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_44|) v_ArrVal_1184) (+ (* |v_ULTIMATE.start_downsweep_~n#1_32| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1185))) (let ((.cse8 (select .cse11 .cse2))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_44| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (= .cse8 0)) (let ((.cse9 (+ (select .cse11 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse8))) (<= .cse9 (select (select (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse11 .cse2 .cse9) |c_ULTIMATE.start_main_~a~0#1.offset| .cse8)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|))) (< |v_ULTIMATE.start_downsweep_~n#1_32| (+ 1 |v_ULTIMATE.start_main_~i~1#1_286|)) (< |v_ULTIMATE.start_upsweep_~right~0#1_82| 1)))))) (not (<= .cse7 |v_ULTIMATE.start_main_~i~1#1_286|)))))) is different from false [2022-11-19 08:12:51,354 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|)) (.cse7 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse6))) (.cse8 (+ |c_ULTIMATE.start_main_~i~1#1| 1))) (and (forall ((|v_ULTIMATE.start_main_~i~1#1_286| Int)) (or (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_82| Int) (|v_ULTIMATE.start_downsweep_~n#1_32| Int) (v_ArrVal_1185 Int) (v_ArrVal_1184 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_44| Int) (v_ArrVal_1181 Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store .cse5 (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse6) .cse7) (+ |ULTIMATE.start_main_~a0~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~1#1_286|)) v_ArrVal_1181)))) (let ((.cse2 (store (store (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_82| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_44|) v_ArrVal_1184) (+ (* |v_ULTIMATE.start_downsweep_~n#1_32| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1185))) (let ((.cse4 (select .cse2 .cse3))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_44| |c_ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse0 (+ .cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (<= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|))) (not (= .cse4 0)) (< |v_ULTIMATE.start_downsweep_~n#1_32| (+ 1 |v_ULTIMATE.start_main_~i~1#1_286|)) (< |v_ULTIMATE.start_upsweep_~right~0#1_82| 1)))))) (not (<= .cse8 |v_ULTIMATE.start_main_~i~1#1_286|)))) (forall ((|v_ULTIMATE.start_main_~i~1#1_286| Int)) (or (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_82| Int) (|v_ULTIMATE.start_downsweep_~n#1_32| Int) (v_ArrVal_1185 Int) (v_ArrVal_1184 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_44| Int) (v_ArrVal_1181 Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store .cse5 (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse6) .cse7) (+ |ULTIMATE.start_main_~a0~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~1#1_286|)) v_ArrVal_1181)))) (let ((.cse10 (store (store (select .cse9 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_82| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_44|) v_ArrVal_1184) (+ (* |v_ULTIMATE.start_downsweep_~n#1_32| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1185))) (let ((.cse12 (select .cse10 .cse3))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_44| |c_ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse11 (+ .cse12 (select .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (<= (select (select (store .cse9 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse10 .cse3 .cse11) |c_ULTIMATE.start_main_~a~0#1.offset| .cse12)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse11)) (not (= .cse12 0)) (< |v_ULTIMATE.start_downsweep_~n#1_32| (+ 1 |v_ULTIMATE.start_main_~i~1#1_286|)) (< |v_ULTIMATE.start_upsweep_~right~0#1_82| 1)))))) (not (<= .cse8 |v_ULTIMATE.start_main_~i~1#1_286|))))))) is different from false [2022-11-19 08:13:26,399 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:13:26,775 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_main_~i~1#1_286| Int) (v_ArrVal_1193 (Array Int Int))) (or (not (<= 1 |v_ULTIMATE.start_main_~i~1#1_286|)) (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_82| Int) (|v_ULTIMATE.start_downsweep_~n#1_32| Int) (v_ArrVal_1185 Int) (v_ArrVal_1184 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_44| Int) (v_ArrVal_1181 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_1193 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_1193) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ |ULTIMATE.start_main_~a0~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~1#1_286|)) v_ArrVal_1181)))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_82| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_44|) v_ArrVal_1184) (+ (* |v_ULTIMATE.start_downsweep_~n#1_32| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1185))) (let ((.cse4 (select .cse1 .cse2))) (or (let ((.cse3 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4))) (<= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse3)) (< |v_ULTIMATE.start_upsweep_~a#1.offset_44| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (= .cse4 0)) (< |v_ULTIMATE.start_downsweep_~n#1_32| (+ 1 |v_ULTIMATE.start_main_~i~1#1_286|)) (< |v_ULTIMATE.start_upsweep_~right~0#1_82| 1)))))))) (forall ((|v_ULTIMATE.start_main_~i~1#1_286| Int) (v_ArrVal_1193 (Array Int Int))) (or (forall ((|v_ULTIMATE.start_upsweep_~right~0#1_82| Int) (|v_ULTIMATE.start_downsweep_~n#1_32| Int) (v_ArrVal_1185 Int) (v_ArrVal_1184 Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_44| Int) (v_ArrVal_1181 Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store v_ArrVal_1193 |ULTIMATE.start_main_~a0~0#1.offset| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_1193) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ |ULTIMATE.start_main_~a0~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~1#1_286|)) v_ArrVal_1181)))) (let ((.cse8 (store (store (select .cse7 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_82| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_44|) v_ArrVal_1184) (+ (* |v_ULTIMATE.start_downsweep_~n#1_32| 4) (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1185))) (let ((.cse5 (select .cse8 .cse2))) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_44| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (= .cse5 0)) (< |v_ULTIMATE.start_downsweep_~n#1_32| (+ 1 |v_ULTIMATE.start_main_~i~1#1_286|)) (< |v_ULTIMATE.start_upsweep_~right~0#1_82| 1) (let ((.cse6 (+ (select .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse5))) (<= .cse6 (select (select (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse8 .cse2 .cse6) |c_ULTIMATE.start_main_~a~0#1.offset| .cse5)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|)))))))) (not (<= 1 |v_ULTIMATE.start_main_~i~1#1_286|)))))) is different from false [2022-11-19 08:13:26,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513897771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:13:26,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35607268] [2022-11-19 08:13:26,799 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2022-11-19 08:13:26,800 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:13:26,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:13:26,800 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:13:26,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:13:27,113 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 10 treesize of output 9 [2022-11-19 08:13:27,131 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 [2022-11-19 08:13:27,192 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 7 treesize of output 6 [2022-11-19 08:13:27,367 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-11-19 08:13:27,368 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 1 case distinctions, treesize of input 127 treesize of output 127 [2022-11-19 08:13:27,486 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:13:27,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 128 treesize of output 130 [2022-11-19 08:13:27,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:13:27,633 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:13:27,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 6 treesize of output 4 [2022-11-19 08:13:27,778 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 08:13:27,950 INFO L321 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2022-11-19 08:13:27,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 210 treesize of output 206 [2022-11-19 08:13:28,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:13:28,111 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:13:28,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:13:28,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:13:28,253 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:13:28,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:13:28,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:13:28,367 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:13:28,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 08:13:28,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:28,533 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 36 treesize of output 28 [2022-11-19 08:13:28,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:28,659 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 36 treesize of output 28 [2022-11-19 08:13:28,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:28,779 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 36 treesize of output 28 [2022-11-19 08:13:28,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:13:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:29,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:29,273 INFO L321 Elim1Store]: treesize reduction 25, result has 59.7 percent of original size [2022-11-19 08:13:29,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 67 [2022-11-19 08:13:29,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:29,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:29,409 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-19 08:13:29,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 78 [2022-11-19 08:13:29,781 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:13:29,781 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 33 treesize of output 45 [2022-11-19 08:13:29,997 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:13:29,997 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 69 treesize of output 77 [2022-11-19 08:13:30,273 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:13:30,273 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 33 treesize of output 45 [2022-11-19 08:13:30,503 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:13:30,503 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 69 treesize of output 77 [2022-11-19 08:13:30,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:30,755 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 45 treesize of output 28 [2022-11-19 08:13:30,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:30,845 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 38 treesize of output 29 [2022-11-19 08:13:31,104 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:13:31,104 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 33 treesize of output 45 [2022-11-19 08:13:31,339 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:13:31,340 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 69 treesize of output 77 [2022-11-19 08:13:31,672 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:13:31,673 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 33 treesize of output 45 [2022-11-19 08:13:31,933 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:13:31,933 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 69 treesize of output 77 [2022-11-19 08:13:32,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:32,193 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 0 case distinctions, treesize of input 45 treesize of output 28 [2022-11-19 08:13:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:13:32,285 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 0 case distinctions, treesize of input 38 treesize of output 29 [2022-11-19 08:13:32,609 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:13:32,609 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 33 treesize of output 45 [2022-11-19 08:13:32,848 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:13:32,849 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 69 treesize of output 77 [2022-11-19 08:13:33,150 INFO L321 Elim1Store]: treesize reduction 22, result has 59.3 percent of original size [2022-11-19 08:13:33,150 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 33 treesize of output 45 [2022-11-19 08:13:33,397 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-19 08:13:33,402 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 69 treesize of output 77 [2022-11-19 08:13:34,172 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 70 for LOIs [2022-11-19 08:13:34,209 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-19 08:13:34,214 INFO L180 IcfgInterpreter]: Interpretation finished