./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 15fe42cb945ebd9019cc38134c29264613097f232589ff55d01d33d66b19d85f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:57:12,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:57:12,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:57:12,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:57:12,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:57:12,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:57:12,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:57:12,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:57:12,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:57:12,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:57:12,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:57:12,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:57:12,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:57:12,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:57:12,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:57:12,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:57:12,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:57:12,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:57:12,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:57:12,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:57:12,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:57:12,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:57:12,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:57:12,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:57:12,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:57:12,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:57:12,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:57:12,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:57:12,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:57:12,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:57:12,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:57:12,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:57:12,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:57:12,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:57:12,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:57:12,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:57:12,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:57:12,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:57:12,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:57:12,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:57:12,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:57:12,133 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 10:57:12,152 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:57:12,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:57:12,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:57:12,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:57:12,154 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:57:12,154 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:57:12,154 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:57:12,154 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:57:12,154 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:57:12,154 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:57:12,155 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:57:12,155 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:57:12,155 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:57:12,155 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:57:12,155 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:57:12,156 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:57:12,156 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:57:12,156 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:57:12,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 10:57:12,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 10:57:12,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:57:12,157 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:57:12,157 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 10:57:12,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:57:12,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:57:12,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:57:12,158 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 10:57:12,158 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 10:57:12,158 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 10:57:12,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:57:12,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:57:12,159 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:57:12,159 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:57:12,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:57:12,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:57:12,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:57:12,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:57:12,160 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:57:12,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:57:12,160 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:57:12,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:57:12,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:57:12,161 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_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15fe42cb945ebd9019cc38134c29264613097f232589ff55d01d33d66b19d85f [2022-12-14 10:57:12,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:57:12,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:57:12,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:57:12,359 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:57:12,360 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:57:12,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2022-12-14 10:57:14,906 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:57:15,081 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:57:15,081 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2022-12-14 10:57:15,088 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/data/d6adb14c5/51e51efdb6cb49aaba7c7f638594905e/FLAGeec5a174c [2022-12-14 10:57:15,476 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/data/d6adb14c5/51e51efdb6cb49aaba7c7f638594905e [2022-12-14 10:57:15,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:57:15,480 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:57:15,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:57:15,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:57:15,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:57:15,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b80c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15, skipping insertion in model container [2022-12-14 10:57:15,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:57:15,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:57:15,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:57:15,686 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:57:15,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:57:15,729 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:57:15,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15 WrapperNode [2022-12-14 10:57:15,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:57:15,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:57:15,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:57:15,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:57:15,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,757 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-12-14 10:57:15,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:57:15,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:57:15,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:57:15,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:57:15,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,773 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:57:15,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:57:15,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:57:15,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:57:15,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (1/1) ... [2022-12-14 10:57:15,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:57:15,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:15,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:57:15,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:57:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:57:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:57:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:57:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:57:15,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:57:15,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:57:15,911 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:57:15,912 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:57:16,118 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:57:16,166 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:57:16,166 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 10:57:16,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:57:16 BoogieIcfgContainer [2022-12-14 10:57:16,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:57:16,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:57:16,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:57:16,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:57:16,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:57:15" (1/3) ... [2022-12-14 10:57:16,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2542fa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:57:16, skipping insertion in model container [2022-12-14 10:57:16,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:57:15" (2/3) ... [2022-12-14 10:57:16,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2542fa26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:57:16, skipping insertion in model container [2022-12-14 10:57:16,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:57:16" (3/3) ... [2022-12-14 10:57:16,174 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca-1.i [2022-12-14 10:57:16,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:57:16,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-12-14 10:57:16,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:57:16,226 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;@42aa26ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:57:16,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-12-14 10:57:16,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 10:57:16,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:16,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 10:57:16,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:16,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:16,239 INFO L85 PathProgramCache]: Analyzing trace with hash 162186, now seen corresponding path program 1 times [2022-12-14 10:57:16,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:16,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274371151] [2022-12-14 10:57:16,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:16,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:16,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274371151] [2022-12-14 10:57:16,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274371151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:16,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:16,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:57:16,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137674568] [2022-12-14 10:57:16,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:16,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:16,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:16,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:16,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:16,496 INFO L87 Difference]: Start difference. First operand has 39 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 38 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:16,548 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-12-14 10:57:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:16,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 10:57:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:16,555 INFO L225 Difference]: With dead ends: 37 [2022-12-14 10:57:16,555 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 10:57:16,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:16,558 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:16,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 10:57:16,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 10:57:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-12-14 10:57:16,579 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 3 [2022-12-14 10:57:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:16,579 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-12-14 10:57:16,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-12-14 10:57:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 10:57:16,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:16,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 10:57:16,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:57:16,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:16,581 INFO L85 PathProgramCache]: Analyzing trace with hash 162187, now seen corresponding path program 1 times [2022-12-14 10:57:16,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:16,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476092236] [2022-12-14 10:57:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:16,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:16,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:16,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:16,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476092236] [2022-12-14 10:57:16,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476092236] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:16,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:16,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:57:16,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009601635] [2022-12-14 10:57:16,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:16,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:57:16,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:57:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:57:16,778 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:16,884 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-12-14 10:57:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:57:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 10:57:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:16,885 INFO L225 Difference]: With dead ends: 70 [2022-12-14 10:57:16,885 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 10:57:16,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:57:16,887 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:16,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 55 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 10:57:16,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 38. [2022-12-14 10:57:16,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-12-14 10:57:16,891 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 3 [2022-12-14 10:57:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:16,892 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-12-14 10:57:16,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-12-14 10:57:16,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:57:16,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:16,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:57:16,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:57:16,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:16,893 INFO L85 PathProgramCache]: Analyzing trace with hash 5136908, now seen corresponding path program 1 times [2022-12-14 10:57:16,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:16,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385925038] [2022-12-14 10:57:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:16,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:16,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:16,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385925038] [2022-12-14 10:57:16,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385925038] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:16,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:16,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:57:16,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9159668] [2022-12-14 10:57:16,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:16,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:16,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:16,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:17,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:17,000 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:17,038 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-12-14 10:57:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:17,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:57:17,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:17,040 INFO L225 Difference]: With dead ends: 37 [2022-12-14 10:57:17,040 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 10:57:17,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:17,042 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:17,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 18 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 10:57:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 10:57:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-12-14 10:57:17,045 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 4 [2022-12-14 10:57:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:17,046 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-12-14 10:57:17,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-12-14 10:57:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:57:17,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:17,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:57:17,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 10:57:17,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash 5134015, now seen corresponding path program 1 times [2022-12-14 10:57:17,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:17,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072082257] [2022-12-14 10:57:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:17,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:17,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:17,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072082257] [2022-12-14 10:57:17,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072082257] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:17,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:17,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:57:17,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088090575] [2022-12-14 10:57:17,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:17,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:17,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:17,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:17,076 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:17,102 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-12-14 10:57:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:17,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:57:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:17,103 INFO L225 Difference]: With dead ends: 35 [2022-12-14 10:57:17,104 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 10:57:17,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:17,104 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:17,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 17 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 10:57:17,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-14 10:57:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-12-14 10:57:17,107 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 4 [2022-12-14 10:57:17,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:17,107 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-12-14 10:57:17,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,108 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-12-14 10:57:17,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 10:57:17,108 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:17,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 10:57:17,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 10:57:17,108 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:17,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:17,109 INFO L85 PathProgramCache]: Analyzing trace with hash 5134016, now seen corresponding path program 1 times [2022-12-14 10:57:17,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:17,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569612413] [2022-12-14 10:57:17,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:17,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:17,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:17,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569612413] [2022-12-14 10:57:17,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569612413] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:17,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:17,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:57:17,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772224388] [2022-12-14 10:57:17,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:17,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:57:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:57:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:57:17,227 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:17,318 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-12-14 10:57:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:57:17,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 10:57:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:17,319 INFO L225 Difference]: With dead ends: 63 [2022-12-14 10:57:17,320 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 10:57:17,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:57:17,320 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:17,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 48 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:17,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 10:57:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 37. [2022-12-14 10:57:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-12-14 10:57:17,323 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 4 [2022-12-14 10:57:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:17,323 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-12-14 10:57:17,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-12-14 10:57:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:57:17,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:17,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 10:57:17,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 10:57:17,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash 159244142, now seen corresponding path program 1 times [2022-12-14 10:57:17,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:17,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911683807] [2022-12-14 10:57:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:17,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:17,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:17,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911683807] [2022-12-14 10:57:17,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911683807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:17,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:17,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:57:17,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401760509] [2022-12-14 10:57:17,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:17,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:57:17,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:17,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:57:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:57:17,467 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:17,498 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-12-14 10:57:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:17,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 10:57:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:17,499 INFO L225 Difference]: With dead ends: 36 [2022-12-14 10:57:17,499 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 10:57:17,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:57:17,500 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:17,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 16 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 10:57:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 10:57:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-12-14 10:57:17,504 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 5 [2022-12-14 10:57:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:17,504 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-12-14 10:57:17,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-12-14 10:57:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:57:17,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:17,505 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 10:57:17,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 10:57:17,505 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash 155961429, now seen corresponding path program 1 times [2022-12-14 10:57:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:17,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917242237] [2022-12-14 10:57:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:17,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:17,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:17,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917242237] [2022-12-14 10:57:17,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917242237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:17,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880480271] [2022-12-14 10:57:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:17,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:17,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:17,685 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:17,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:57:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:17,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:57:17,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:17,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:17,811 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 9 treesize of output 11 [2022-12-14 10:57:17,817 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 10 treesize of output 8 [2022-12-14 10:57:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:17,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:18,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880480271] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:18,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370372339] [2022-12-14 10:57:18,047 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 10:57:18,047 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:57:18,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:57:18,057 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:57:18,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:57:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:18,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:57:18,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:57:18,237 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:18,277 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:18,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:18,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '601#(and (not (<= (+ |ULTIMATE.start_main_~nondetString1~0#1.offset| |ULTIMATE.start_main_~i~0#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString1~0#1.base|))) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_#t~nondet15#1| 127) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet15#1|)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:57:18,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:57:18,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:57:18,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-12-14 10:57:18,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667497581] [2022-12-14 10:57:18,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:18,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 10:57:18,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:18,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 10:57:18,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:57:18,569 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:18,799 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2022-12-14 10:57:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:57:18,800 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 10:57:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:18,801 INFO L225 Difference]: With dead ends: 96 [2022-12-14 10:57:18,801 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 10:57:18,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:57:18,802 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 233 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:18,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 160 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 10:57:18,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 33. [2022-12-14 10:57:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-12-14 10:57:18,805 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 5 [2022-12-14 10:57:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:18,805 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-12-14 10:57:18,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-12-14 10:57:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:57:18,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:18,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:57:18,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:57:19,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:19,008 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:19,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:19,010 INFO L85 PathProgramCache]: Analyzing trace with hash 641603152, now seen corresponding path program 1 times [2022-12-14 10:57:19,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:19,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948311195] [2022-12-14 10:57:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:19,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:19,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948311195] [2022-12-14 10:57:19,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948311195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:19,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:19,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:57:19,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515518784] [2022-12-14 10:57:19,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:19,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:57:19,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:57:19,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:57:19,133 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:19,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:19,182 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-12-14 10:57:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:57:19,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:57:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:19,183 INFO L225 Difference]: With dead ends: 31 [2022-12-14 10:57:19,183 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 10:57:19,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:57:19,184 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:19,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 18 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 10:57:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 10:57:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-12-14 10:57:19,186 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 6 [2022-12-14 10:57:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:19,186 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-12-14 10:57:19,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-12-14 10:57:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:57:19,186 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:19,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 10:57:19,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 10:57:19,186 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:19,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:19,187 INFO L85 PathProgramCache]: Analyzing trace with hash 641603153, now seen corresponding path program 1 times [2022-12-14 10:57:19,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:19,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681095260] [2022-12-14 10:57:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:19,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:19,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:19,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681095260] [2022-12-14 10:57:19,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681095260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:19,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:19,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:57:19,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136245442] [2022-12-14 10:57:19,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:19,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:57:19,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:19,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:57:19,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:57:19,270 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:19,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:19,317 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2022-12-14 10:57:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:57:19,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:57:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:19,318 INFO L225 Difference]: With dead ends: 50 [2022-12-14 10:57:19,318 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 10:57:19,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:57:19,319 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 127 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:19,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 26 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 10:57:19,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2022-12-14 10:57:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:19,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-12-14 10:57:19,321 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 6 [2022-12-14 10:57:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:19,321 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-12-14 10:57:19,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-12-14 10:57:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:57:19,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:19,322 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 10:57:19,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 10:57:19,322 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:19,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash 638897392, now seen corresponding path program 1 times [2022-12-14 10:57:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:19,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508451539] [2022-12-14 10:57:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:19,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:19,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:19,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508451539] [2022-12-14 10:57:19,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508451539] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:19,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998498718] [2022-12-14 10:57:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:19,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:19,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:19,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:19,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:57:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:19,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:57:19,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:19,550 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 10:57:19,550 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 10:57:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:19,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:19,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998498718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:19,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [667257424] [2022-12-14 10:57:19,808 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 10:57:19,808 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:57:19,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:57:19,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:57:19,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:57:19,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:19,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:57:19,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:57:19,914 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:19,941 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:19,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:20,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '942#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet17#1|)) (not (<= (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~i~1#1| 1) (select |#length| |ULTIMATE.start_main_~nondetString2~0#1.base|))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= |ULTIMATE.start_main_#t~nondet17#1| 127) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:57:20,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:57:20,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:57:20,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-12-14 10:57:20,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590059038] [2022-12-14 10:57:20,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:20,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:57:20,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:20,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:57:20,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:57:20,342 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:20,542 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2022-12-14 10:57:20,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:57:20,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:57:20,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:20,543 INFO L225 Difference]: With dead ends: 86 [2022-12-14 10:57:20,543 INFO L226 Difference]: Without dead ends: 86 [2022-12-14 10:57:20,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:57:20,544 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 303 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:20,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 121 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-14 10:57:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 31. [2022-12-14 10:57:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-12-14 10:57:20,547 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 6 [2022-12-14 10:57:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:20,548 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-12-14 10:57:20,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-12-14 10:57:20,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:57:20,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:20,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:20,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:57:20,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:20,750 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:20,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1395073449, now seen corresponding path program 1 times [2022-12-14 10:57:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:20,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217237561] [2022-12-14 10:57:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:20,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:20,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217237561] [2022-12-14 10:57:20,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217237561] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:20,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:20,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:57:20,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711777769] [2022-12-14 10:57:20,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:20,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:57:20,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:20,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:57:20,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:57:20,881 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:20,922 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-12-14 10:57:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:57:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:57:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:20,923 INFO L225 Difference]: With dead ends: 30 [2022-12-14 10:57:20,923 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 10:57:20,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:57:20,924 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:20,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 20 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 10:57:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-12-14 10:57:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-12-14 10:57:20,925 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 9 [2022-12-14 10:57:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:20,925 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-12-14 10:57:20,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-12-14 10:57:20,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:57:20,926 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:20,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:20,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 10:57:20,926 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:20,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1395073450, now seen corresponding path program 1 times [2022-12-14 10:57:20,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:20,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999196311] [2022-12-14 10:57:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:20,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:21,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:21,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999196311] [2022-12-14 10:57:21,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999196311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:21,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:21,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:57:21,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3482754] [2022-12-14 10:57:21,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:21,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:57:21,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:21,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:57:21,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:57:21,022 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:21,087 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-12-14 10:57:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:57:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:57:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:21,087 INFO L225 Difference]: With dead ends: 41 [2022-12-14 10:57:21,088 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 10:57:21,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:57:21,088 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:21,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:21,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 10:57:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-12-14 10:57:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-12-14 10:57:21,091 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 9 [2022-12-14 10:57:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:21,091 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-12-14 10:57:21,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-12-14 10:57:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:57:21,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:21,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:21,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 10:57:21,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:21,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash 297535999, now seen corresponding path program 1 times [2022-12-14 10:57:21,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:21,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569871814] [2022-12-14 10:57:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:21,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:21,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:21,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569871814] [2022-12-14 10:57:21,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569871814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:21,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:21,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:57:21,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127206607] [2022-12-14 10:57:21,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:21,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:57:21,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:21,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:57:21,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:57:21,173 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:21,196 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-12-14 10:57:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:57:21,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 10:57:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:21,197 INFO L225 Difference]: With dead ends: 32 [2022-12-14 10:57:21,197 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 10:57:21,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:57:21,197 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:21,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 10:57:21,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 10:57:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-12-14 10:57:21,200 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 10 [2022-12-14 10:57:21,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:21,200 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-12-14 10:57:21,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-12-14 10:57:21,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:57:21,200 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:21,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:21,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 10:57:21,201 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:21,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1763945294, now seen corresponding path program 1 times [2022-12-14 10:57:21,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:21,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424663392] [2022-12-14 10:57:21,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:21,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:21,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:21,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424663392] [2022-12-14 10:57:21,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424663392] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:21,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:21,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:57:21,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353231135] [2022-12-14 10:57:21,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:21,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:57:21,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:21,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:57:21,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:21,225 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:21,242 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-12-14 10:57:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:57:21,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 10:57:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:21,243 INFO L225 Difference]: With dead ends: 31 [2022-12-14 10:57:21,243 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 10:57:21,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:57:21,244 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:21,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:57:21,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 10:57:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 10:57:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-12-14 10:57:21,246 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 12 [2022-12-14 10:57:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:21,246 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-12-14 10:57:21,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-12-14 10:57:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 10:57:21,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:21,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:21,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 10:57:21,247 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:21,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:21,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1152123315, now seen corresponding path program 1 times [2022-12-14 10:57:21,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:21,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289783559] [2022-12-14 10:57:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:21,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:21,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:21,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289783559] [2022-12-14 10:57:21,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289783559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:21,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:21,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 10:57:21,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113637582] [2022-12-14 10:57:21,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:21,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:57:21,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:57:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:57:21,418 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:21,507 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-12-14 10:57:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:57:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 10:57:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:21,507 INFO L225 Difference]: With dead ends: 39 [2022-12-14 10:57:21,508 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 10:57:21,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:57:21,508 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:21,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 10:57:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-12-14 10:57:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-12-14 10:57:21,511 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 13 [2022-12-14 10:57:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:21,511 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-12-14 10:57:21,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-12-14 10:57:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:57:21,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:21,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:21,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 10:57:21,512 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:21,512 INFO L85 PathProgramCache]: Analyzing trace with hash 832625661, now seen corresponding path program 1 times [2022-12-14 10:57:21,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:21,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821593833] [2022-12-14 10:57:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:21,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:21,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:21,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821593833] [2022-12-14 10:57:21,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821593833] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:21,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:21,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 10:57:21,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135564279] [2022-12-14 10:57:21,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:21,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:57:21,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:21,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:57:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:57:21,656 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:21,753 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-12-14 10:57:21,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:57:21,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 10:57:21,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:21,753 INFO L225 Difference]: With dead ends: 49 [2022-12-14 10:57:21,754 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 10:57:21,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-12-14 10:57:21,754 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:21,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:21,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 10:57:21,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-12-14 10:57:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-12-14 10:57:21,757 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 15 [2022-12-14 10:57:21,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:21,757 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-12-14 10:57:21,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-12-14 10:57:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:57:21,758 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:21,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:21,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 10:57:21,759 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:21,759 INFO L85 PathProgramCache]: Analyzing trace with hash 46125280, now seen corresponding path program 1 times [2022-12-14 10:57:21,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:21,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275003740] [2022-12-14 10:57:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:21,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:21,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:21,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275003740] [2022-12-14 10:57:21,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275003740] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:21,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374218167] [2022-12-14 10:57:21,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:21,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:21,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:21,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:21,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:57:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:21,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:57:21,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:22,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:22,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:57:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:22,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374218167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:22,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882652888] [2022-12-14 10:57:22,111 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:57:22,111 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:57:22,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:57:22,111 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:57:22,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:57:22,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:22,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:57:22,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:57:22,239 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:22,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:57:22,311 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:22,343 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:57:22,343 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 24 [2022-12-14 10:57:22,978 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:25,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1650#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 10:57:25,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:57:25,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:57:25,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-12-14 10:57:25,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238798255] [2022-12-14 10:57:25,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:25,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:57:25,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:25,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:57:25,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-12-14 10:57:25,380 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:25,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:25,517 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-12-14 10:57:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:57:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 10:57:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:25,517 INFO L225 Difference]: With dead ends: 94 [2022-12-14 10:57:25,517 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 10:57:25,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=194, Invalid=1066, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:57:25,518 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 187 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:25,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 54 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 10:57:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2022-12-14 10:57:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 64 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2022-12-14 10:57:25,520 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 16 [2022-12-14 10:57:25,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:25,521 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2022-12-14 10:57:25,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2022-12-14 10:57:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 10:57:25,521 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:25,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:25,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:57:25,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 10:57:25,723 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:25,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:25,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1756819789, now seen corresponding path program 1 times [2022-12-14 10:57:25,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:25,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672001053] [2022-12-14 10:57:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:25,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:25,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:25,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672001053] [2022-12-14 10:57:25,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672001053] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:25,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295135279] [2022-12-14 10:57:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:25,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:25,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:25,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:25,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:57:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:57:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:26,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:26,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:57:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:26,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295135279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:26,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935173295] [2022-12-14 10:57:26,106 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:57:26,106 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:57:26,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:57:26,107 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:57:26,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:57:26,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:26,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:57:26,166 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 11 treesize of output 7 [2022-12-14 10:57:26,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:57:26,237 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:26,285 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:26,329 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 91 treesize of output 83 [2022-12-14 10:57:26,373 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:26,405 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:26,434 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:26,475 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:57:26,475 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 24 [2022-12-14 10:57:26,634 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:28,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1947#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:57:28,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:57:28,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:57:28,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-14 10:57:28,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524635729] [2022-12-14 10:57:28,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:28,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 10:57:28,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 10:57:28,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-12-14 10:57:28,247 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:28,409 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2022-12-14 10:57:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:57:28,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 10:57:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:28,410 INFO L225 Difference]: With dead ends: 89 [2022-12-14 10:57:28,410 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 10:57:28,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 10:57:28,411 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 201 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:28,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 64 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 10:57:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2022-12-14 10:57:28,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 60 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:28,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-12-14 10:57:28,414 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 17 [2022-12-14 10:57:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:28,415 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-12-14 10:57:28,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-12-14 10:57:28,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 10:57:28,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:28,415 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:28,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:57:28,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 10:57:28,617 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:28,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1756710870, now seen corresponding path program 2 times [2022-12-14 10:57:28,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:28,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186671732] [2022-12-14 10:57:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:28,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:28,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:28,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186671732] [2022-12-14 10:57:28,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186671732] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:28,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734957379] [2022-12-14 10:57:28,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:57:28,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:28,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:28,943 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:28,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:57:29,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:57:29,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:57:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 10:57:29,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:29,056 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:29,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:29,203 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 15 treesize of output 13 [2022-12-14 10:57:29,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:57:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:29,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734957379] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570232689] [2022-12-14 10:57:29,265 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:57:29,265 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:57:29,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:57:29,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:57:29,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:57:29,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:29,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:57:29,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:57:29,374 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:29,399 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:29,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:57:29,466 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:57:29,467 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 90 treesize of output 89 [2022-12-14 10:57:29,512 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:29,530 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:29,602 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 10:57:29,603 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 177 treesize of output 181 [2022-12-14 10:57:29,740 INFO L321 Elim1Store]: treesize reduction 50, result has 45.1 percent of original size [2022-12-14 10:57:29,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 328 treesize of output 343 [2022-12-14 10:57:30,663 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:33,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2265#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:57:33,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:57:33,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:57:33,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-12-14 10:57:33,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513974889] [2022-12-14 10:57:33,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:33,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 10:57:33,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:33,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 10:57:33,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:57:33,425 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:33,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:33,738 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2022-12-14 10:57:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:57:33,738 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 10:57:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:33,738 INFO L225 Difference]: With dead ends: 103 [2022-12-14 10:57:33,738 INFO L226 Difference]: Without dead ends: 103 [2022-12-14 10:57:33,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 10:57:33,740 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 200 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:33,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 81 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-14 10:57:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 90. [2022-12-14 10:57:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 89 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2022-12-14 10:57:33,743 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 21 [2022-12-14 10:57:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:33,743 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2022-12-14 10:57:33,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2022-12-14 10:57:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 10:57:33,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:33,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:33,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:57:33,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:33,946 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash -501604058, now seen corresponding path program 3 times [2022-12-14 10:57:33,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:33,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098077804] [2022-12-14 10:57:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:34,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:34,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098077804] [2022-12-14 10:57:34,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098077804] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:34,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053752397] [2022-12-14 10:57:34,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:57:34,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:34,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:34,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:34,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:57:34,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:57:34,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:57:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 10:57:34,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:34,290 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:57:34,290 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 10:57:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:34,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:34,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053752397] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:34,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1080060650] [2022-12-14 10:57:34,529 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:57:34,529 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:57:34,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:57:34,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:57:34,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:57:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:34,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:57:34,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:57:34,632 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:34,667 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:34,700 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:34,744 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 85 treesize of output 77 [2022-12-14 10:57:34,778 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:34,791 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:34,822 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:57:34,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:57:35,077 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:36,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2648#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:57:36,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:57:36,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:57:36,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-12-14 10:57:36,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289159] [2022-12-14 10:57:36,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:36,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 10:57:36,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 10:57:36,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 10:57:36,466 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:36,811 INFO L93 Difference]: Finished difference Result 136 states and 161 transitions. [2022-12-14 10:57:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:57:36,812 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 10:57:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:36,813 INFO L225 Difference]: With dead ends: 136 [2022-12-14 10:57:36,814 INFO L226 Difference]: Without dead ends: 136 [2022-12-14 10:57:36,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=317, Invalid=1753, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 10:57:36,815 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 288 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:36,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 130 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:57:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-14 10:57:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2022-12-14 10:57:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.2604166666666667) internal successors, (121), 97 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2022-12-14 10:57:36,819 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 23 [2022-12-14 10:57:36,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:36,820 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2022-12-14 10:57:36,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2022-12-14 10:57:36,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 10:57:36,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:36,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:36,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 10:57:37,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:37,022 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:37,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:37,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1485103751, now seen corresponding path program 2 times [2022-12-14 10:57:37,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:37,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124620137] [2022-12-14 10:57:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:37,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:37,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124620137] [2022-12-14 10:57:37,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124620137] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:37,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708871589] [2022-12-14 10:57:37,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:57:37,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:37,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:37,323 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:37,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:57:37,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 10:57:37,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:57:37,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 10:57:37,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:37,413 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 10:57:37,413 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-14 10:57:37,526 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:37,590 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:57:37,590 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 17 treesize of output 23 [2022-12-14 10:57:37,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-12-14 10:57:38,040 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 33 treesize of output 23 [2022-12-14 10:57:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:38,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:38,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:57:38,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 10:57:38,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:57:38,579 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 37 treesize of output 32 [2022-12-14 10:57:38,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:57:38,589 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 18 treesize of output 22 [2022-12-14 10:57:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:39,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708871589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:39,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295547256] [2022-12-14 10:57:39,039 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:57:39,040 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:57:39,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:57:39,040 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:57:39,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:57:39,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:39,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:57:39,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:57:39,122 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:39,152 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:39,182 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:39,205 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:57:39,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:57:39,657 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:42,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3086#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 10:57:42,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:57:42,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:57:42,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 15] total 35 [2022-12-14 10:57:42,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430830857] [2022-12-14 10:57:42,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:42,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 10:57:42,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 10:57:42,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2263, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 10:57:42,284 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:43,565 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2022-12-14 10:57:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:57:43,566 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 10:57:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:43,566 INFO L225 Difference]: With dead ends: 158 [2022-12-14 10:57:43,566 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 10:57:43,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=444, Invalid=3978, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 10:57:43,567 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 200 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:43,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 92 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:57:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 10:57:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-12-14 10:57:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 122 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:43,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2022-12-14 10:57:43,570 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 24 [2022-12-14 10:57:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:43,570 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2022-12-14 10:57:43,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:43,570 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2022-12-14 10:57:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 10:57:43,570 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:43,570 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:43,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:57:43,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:43,772 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:43,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1513345263, now seen corresponding path program 3 times [2022-12-14 10:57:43,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:43,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440102575] [2022-12-14 10:57:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:43,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:43,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:43,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440102575] [2022-12-14 10:57:43,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440102575] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:43,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267247374] [2022-12-14 10:57:43,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:57:43,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:43,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:43,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:43,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:57:43,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:57:43,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:57:43,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 10:57:43,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:44,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:44,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:57:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:44,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267247374] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:44,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1979877042] [2022-12-14 10:57:44,245 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:57:44,245 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:57:44,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:57:44,245 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:57:44,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:57:44,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:44,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:57:44,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:57:44,329 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:44,359 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 14 treesize of output 10 [2022-12-14 10:57:44,393 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:44,430 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:57:44,431 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 24 [2022-12-14 10:57:44,950 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:46,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3585#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 10:57:46,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:57:46,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:57:46,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2022-12-14 10:57:46,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684861870] [2022-12-14 10:57:46,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:46,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 10:57:46,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:46,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 10:57:46,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:57:46,992 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:47,206 INFO L93 Difference]: Finished difference Result 202 states and 242 transitions. [2022-12-14 10:57:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:57:47,207 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 10:57:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:47,207 INFO L225 Difference]: With dead ends: 202 [2022-12-14 10:57:47,207 INFO L226 Difference]: Without dead ends: 202 [2022-12-14 10:57:47,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 10:57:47,208 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 262 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:47,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 139 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:57:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-14 10:57:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 162. [2022-12-14 10:57:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.23125) internal successors, (197), 161 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2022-12-14 10:57:47,213 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 26 [2022-12-14 10:57:47,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:47,213 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2022-12-14 10:57:47,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2022-12-14 10:57:47,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 10:57:47,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:47,214 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:47,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:57:47,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 10:57:47,417 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:47,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:47,418 INFO L85 PathProgramCache]: Analyzing trace with hash 450552623, now seen corresponding path program 4 times [2022-12-14 10:57:47,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:47,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670806579] [2022-12-14 10:57:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:47,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:48,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:57:48,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:48,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670806579] [2022-12-14 10:57:48,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670806579] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:48,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234963686] [2022-12-14 10:57:48,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:57:48,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:48,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:48,559 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:48,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:57:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:48,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 10:57:48,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:48,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:57:48,959 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 10:57:48,959 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 32 treesize of output 20 [2022-12-14 10:57:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:48,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:49,120 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 15 treesize of output 13 [2022-12-14 10:57:49,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:57:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:49,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234963686] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:49,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318484816] [2022-12-14 10:57:49,247 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:57:49,247 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:57:49,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:57:49,248 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:57:49,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:57:49,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:49,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:57:49,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:57:49,317 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:49,338 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:49,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:57:49,400 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 85 treesize of output 77 [2022-12-14 10:57:49,427 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:49,440 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:49,470 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:57:49,471 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 24 [2022-12-14 10:57:49,689 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:51,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4167#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:57:51,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:57:51,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:57:51,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 34 [2022-12-14 10:57:51,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059582896] [2022-12-14 10:57:51,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:51,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 10:57:51,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 10:57:51,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 10:57:51,792 INFO L87 Difference]: Start difference. First operand 162 states and 197 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:55,931 INFO L93 Difference]: Finished difference Result 269 states and 314 transitions. [2022-12-14 10:57:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 10:57:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 10:57:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:55,933 INFO L225 Difference]: With dead ends: 269 [2022-12-14 10:57:55,933 INFO L226 Difference]: Without dead ends: 254 [2022-12-14 10:57:55,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=467, Invalid=4789, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 10:57:55,935 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 282 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:55,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 284 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 10:57:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-12-14 10:57:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2022-12-14 10:57:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 215 states have (on average 1.2372093023255815) internal successors, (266), 216 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 266 transitions. [2022-12-14 10:57:55,939 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 266 transitions. Word has length 27 [2022-12-14 10:57:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:55,939 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 266 transitions. [2022-12-14 10:57:55,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 34 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 266 transitions. [2022-12-14 10:57:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 10:57:55,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:55,939 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:55,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:57:56,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 10:57:56,140 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:56,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:56,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1452572545, now seen corresponding path program 5 times [2022-12-14 10:57:56,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:56,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392640432] [2022-12-14 10:57:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:56,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:56,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:56,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392640432] [2022-12-14 10:57:56,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392640432] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:56,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367771799] [2022-12-14 10:57:56,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:57:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:56,380 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:56,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:57:56,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:57:56,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:57:56,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:57:56,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:56,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:56,712 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 7 treesize of output 5 [2022-12-14 10:57:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:56,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367771799] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:56,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183726823] [2022-12-14 10:57:56,756 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:57:56,756 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:57:56,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:57:56,756 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:57:56,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:57:56,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:56,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:57:56,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:57:56,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:57:56,859 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:56,891 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:56,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-12-14 10:57:56,945 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:56,958 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:57:56,980 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:57:56,981 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 24 [2022-12-14 10:57:57,206 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:57:58,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4913#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:57:58,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:57:58,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:57:58,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-12-14 10:57:58,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75670458] [2022-12-14 10:57:58,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:58,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 10:57:58,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:57:58,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 10:57:58,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 10:57:58,844 INFO L87 Difference]: Start difference. First operand 217 states and 266 transitions. Second operand has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:59,351 INFO L93 Difference]: Finished difference Result 308 states and 366 transitions. [2022-12-14 10:57:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:57:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 10:57:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:59,352 INFO L225 Difference]: With dead ends: 308 [2022-12-14 10:57:59,352 INFO L226 Difference]: Without dead ends: 308 [2022-12-14 10:57:59,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=364, Invalid=2288, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 10:57:59,353 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 474 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:59,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 158 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:57:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-12-14 10:57:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 233. [2022-12-14 10:57:59,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.2467532467532467) internal successors, (288), 232 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 288 transitions. [2022-12-14 10:57:59,357 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 288 transitions. Word has length 29 [2022-12-14 10:57:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:59,357 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 288 transitions. [2022-12-14 10:57:59,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:59,357 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 288 transitions. [2022-12-14 10:57:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 10:57:59,357 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:59,357 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:59,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 10:57:59,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:59,559 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:57:59,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:59,560 INFO L85 PathProgramCache]: Analyzing trace with hash 290123272, now seen corresponding path program 6 times [2022-12-14 10:57:59,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:57:59,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254864266] [2022-12-14 10:57:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:59,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:57:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:57:59,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:57:59,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254864266] [2022-12-14 10:57:59,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254864266] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:57:59,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862435104] [2022-12-14 10:57:59,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:57:59,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:59,854 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:59,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:57:59,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:57:59,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:57:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 10:57:59,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:00,008 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:00,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:00,156 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 15 treesize of output 13 [2022-12-14 10:58:00,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:58:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:00,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862435104] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:00,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730832686] [2022-12-14 10:58:00,223 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:00,223 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:00,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:00,224 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:00,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:00,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:00,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:00,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:58:00,300 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:00,339 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:00,368 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:00,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2022-12-14 10:58:00,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:00,443 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:00,475 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:00,475 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 24 [2022-12-14 10:58:00,705 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:02,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5707#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:02,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:02,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:02,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-12-14 10:58:02,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825792831] [2022-12-14 10:58:02,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:02,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:58:02,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:58:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 10:58:02,771 INFO L87 Difference]: Start difference. First operand 233 states and 288 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:03,467 INFO L93 Difference]: Finished difference Result 370 states and 441 transitions. [2022-12-14 10:58:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 10:58:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-14 10:58:03,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:03,470 INFO L225 Difference]: With dead ends: 370 [2022-12-14 10:58:03,470 INFO L226 Difference]: Without dead ends: 351 [2022-12-14 10:58:03,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=394, Invalid=3028, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 10:58:03,472 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 446 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:03,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 330 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:58:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-12-14 10:58:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 300. [2022-12-14 10:58:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 298 states have (on average 1.2583892617449663) internal successors, (375), 299 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:03,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 375 transitions. [2022-12-14 10:58:03,476 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 375 transitions. Word has length 33 [2022-12-14 10:58:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:03,476 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 375 transitions. [2022-12-14 10:58:03,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:03,477 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 375 transitions. [2022-12-14 10:58:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 10:58:03,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:03,477 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:03,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 10:58:03,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 10:58:03,678 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:03,679 INFO L85 PathProgramCache]: Analyzing trace with hash -84828536, now seen corresponding path program 4 times [2022-12-14 10:58:03,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:03,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106119547] [2022-12-14 10:58:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:03,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:58:03,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106119547] [2022-12-14 10:58:03,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106119547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:03,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196140604] [2022-12-14 10:58:03,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:58:03,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:03,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:03,975 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:03,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 10:58:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:04,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 10:58:04,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:04,059 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 10 treesize of output 8 [2022-12-14 10:58:04,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:04,124 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 14 treesize of output 16 [2022-12-14 10:58:04,174 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 15 treesize of output 7 [2022-12-14 10:58:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:58:04,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:04,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:58:04,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 10:58:04,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:58:04,232 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 37 treesize of output 32 [2022-12-14 10:58:04,237 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 7 treesize of output 3 [2022-12-14 10:58:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:58:04,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196140604] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:04,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390094313] [2022-12-14 10:58:04,337 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:04,337 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:04,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:04,338 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:04,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:04,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:04,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:04,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:04,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:04,412 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:04,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:04,480 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:04,480 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 24 [2022-12-14 10:58:04,738 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:06,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6648#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:06,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:06,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:06,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 22 [2022-12-14 10:58:06,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356573967] [2022-12-14 10:58:06,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:06,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:58:06,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:06,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:58:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:58:06,453 INFO L87 Difference]: Start difference. First operand 300 states and 375 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:06,769 INFO L93 Difference]: Finished difference Result 493 states and 608 transitions. [2022-12-14 10:58:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:58:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 10:58:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:06,770 INFO L225 Difference]: With dead ends: 493 [2022-12-14 10:58:06,770 INFO L226 Difference]: Without dead ends: 360 [2022-12-14 10:58:06,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 10:58:06,771 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 168 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:06,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 260 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:58:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-12-14 10:58:06,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 336. [2022-12-14 10:58:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 334 states have (on average 1.2634730538922156) internal successors, (422), 335 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 422 transitions. [2022-12-14 10:58:06,776 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 422 transitions. Word has length 34 [2022-12-14 10:58:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:06,776 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 422 transitions. [2022-12-14 10:58:06,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 422 transitions. [2022-12-14 10:58:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 10:58:06,777 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:06,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:06,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 10:58:06,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 10:58:06,979 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:06,980 INFO L85 PathProgramCache]: Analyzing trace with hash 774131544, now seen corresponding path program 7 times [2022-12-14 10:58:06,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:06,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031692713] [2022-12-14 10:58:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:06,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:07,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031692713] [2022-12-14 10:58:07,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031692713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82172689] [2022-12-14 10:58:07,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:58:07,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:07,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:07,259 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:07,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 10:58:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:07,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 10:58:07,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:07,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:07,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:58:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:07,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82172689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:07,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [157509171] [2022-12-14 10:58:07,627 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:07,627 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:07,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:07,627 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:07,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:07,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:07,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:07,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:58:07,699 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:07,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:07,754 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:07,781 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 85 treesize of output 77 [2022-12-14 10:58:07,808 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:07,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:07,853 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:07,853 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 24 [2022-12-14 10:58:08,076 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:09,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7737#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:09,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:09,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:09,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 28 [2022-12-14 10:58:09,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345681715] [2022-12-14 10:58:09,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:09,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 10:58:09,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 10:58:09,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 10:58:09,577 INFO L87 Difference]: Start difference. First operand 336 states and 422 transitions. Second operand has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:10,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:10,030 INFO L93 Difference]: Finished difference Result 477 states and 575 transitions. [2022-12-14 10:58:10,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 10:58:10,030 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 10:58:10,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:10,032 INFO L225 Difference]: With dead ends: 477 [2022-12-14 10:58:10,032 INFO L226 Difference]: Without dead ends: 477 [2022-12-14 10:58:10,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 10:58:10,033 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 385 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:10,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 296 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:58:10,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-12-14 10:58:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 356. [2022-12-14 10:58:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 354 states have (on average 1.271186440677966) internal successors, (450), 355 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 450 transitions. [2022-12-14 10:58:10,038 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 450 transitions. Word has length 35 [2022-12-14 10:58:10,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:10,038 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 450 transitions. [2022-12-14 10:58:10,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:10,038 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 450 transitions. [2022-12-14 10:58:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 10:58:10,039 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:10,039 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:10,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 10:58:10,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:10,239 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:10,240 INFO L85 PathProgramCache]: Analyzing trace with hash 839972478, now seen corresponding path program 5 times [2022-12-14 10:58:10,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:10,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181020477] [2022-12-14 10:58:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:10,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:58:10,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:10,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181020477] [2022-12-14 10:58:10,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181020477] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:10,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842300232] [2022-12-14 10:58:10,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:58:10,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:10,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:10,388 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:10,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 10:58:10,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:58:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:58:10,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 10:58:10,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:58:10,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:10,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 10:58:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:58:10,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842300232] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:10,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [558800182] [2022-12-14 10:58:10,805 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:10,805 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:10,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:10,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:10,806 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:10,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:10,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:10,849 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:10,874 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:10,887 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:10,918 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:10,954 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:10,954 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 24 [2022-12-14 10:58:11,214 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:13,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8845#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:13,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:13,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:13,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2022-12-14 10:58:13,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529804446] [2022-12-14 10:58:13,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:13,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:58:13,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:13,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:58:13,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 10:58:13,158 INFO L87 Difference]: Start difference. First operand 356 states and 450 transitions. Second operand has 27 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:13,492 INFO L93 Difference]: Finished difference Result 547 states and 682 transitions. [2022-12-14 10:58:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:58:13,493 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-14 10:58:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:13,496 INFO L225 Difference]: With dead ends: 547 [2022-12-14 10:58:13,496 INFO L226 Difference]: Without dead ends: 547 [2022-12-14 10:58:13,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=326, Invalid=2026, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 10:58:13,497 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 300 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:13,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 194 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:58:13,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-12-14 10:58:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 439. [2022-12-14 10:58:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 437 states have (on average 1.2723112128146452) internal successors, (556), 438 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 556 transitions. [2022-12-14 10:58:13,504 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 556 transitions. Word has length 36 [2022-12-14 10:58:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:13,505 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 556 transitions. [2022-12-14 10:58:13,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 26 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 556 transitions. [2022-12-14 10:58:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 10:58:13,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:13,505 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:13,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 10:58:13,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 10:58:13,706 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:13,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:13,706 INFO L85 PathProgramCache]: Analyzing trace with hash -589387679, now seen corresponding path program 8 times [2022-12-14 10:58:13,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:13,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701371648] [2022-12-14 10:58:13,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:13,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:13,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:13,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701371648] [2022-12-14 10:58:13,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701371648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:13,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929627264] [2022-12-14 10:58:13,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:58:13,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:13,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:13,993 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:13,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 10:58:14,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:58:14,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:58:14,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 10:58:14,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:14,192 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 14 treesize of output 10 [2022-12-14 10:58:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:14,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:14,361 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 15 treesize of output 13 [2022-12-14 10:58:14,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:58:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:14,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929627264] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:14,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175183025] [2022-12-14 10:58:14,438 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:14,438 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:14,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:14,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:14,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:14,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:14,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:14,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:58:14,511 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:14,532 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:14,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:58:14,594 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:58:14,594 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 84 treesize of output 83 [2022-12-14 10:58:14,625 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:14,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:14,667 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:14,667 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 24 [2022-12-14 10:58:14,883 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:16,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10121#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:16,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:16,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:16,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-12-14 10:58:16,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730940807] [2022-12-14 10:58:16,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:16,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 10:58:16,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:16,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 10:58:16,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1801, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 10:58:16,605 INFO L87 Difference]: Start difference. First operand 439 states and 556 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:17,457 INFO L93 Difference]: Finished difference Result 703 states and 858 transitions. [2022-12-14 10:58:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 10:58:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-14 10:58:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:17,459 INFO L225 Difference]: With dead ends: 703 [2022-12-14 10:58:17,459 INFO L226 Difference]: Without dead ends: 632 [2022-12-14 10:58:17,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=456, Invalid=3966, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 10:58:17,461 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 370 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:17,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 534 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 10:58:17,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-12-14 10:58:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 544. [2022-12-14 10:58:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 542 states have (on average 1.2822878228782288) internal successors, (695), 543 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 695 transitions. [2022-12-14 10:58:17,476 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 695 transitions. Word has length 39 [2022-12-14 10:58:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:17,476 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 695 transitions. [2022-12-14 10:58:17,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 695 transitions. [2022-12-14 10:58:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 10:58:17,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:17,477 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:17,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 10:58:17,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 10:58:17,679 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:17,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:17,680 INFO L85 PathProgramCache]: Analyzing trace with hash -144847439, now seen corresponding path program 9 times [2022-12-14 10:58:17,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:17,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067974323] [2022-12-14 10:58:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:17,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:18,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:18,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067974323] [2022-12-14 10:58:18,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067974323] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:18,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381014905] [2022-12-14 10:58:18,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:58:18,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:18,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:18,079 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:18,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 10:58:18,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:58:18,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:58:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 10:58:18,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:18,180 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:58:18,180 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 10:58:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:18,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:18,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381014905] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:18,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1387213534] [2022-12-14 10:58:18,684 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:18,684 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:18,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:18,685 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:18,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:18,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:18,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:18,731 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:18,759 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:18,776 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:18,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:58:18,847 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:18,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:18,918 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:18,919 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 24 [2022-12-14 10:58:19,084 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:22,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11705#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:22,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:22,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:22,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2022-12-14 10:58:22,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007636601] [2022-12-14 10:58:22,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:22,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 10:58:22,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 10:58:22,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 10:58:22,164 INFO L87 Difference]: Start difference. First operand 544 states and 695 transitions. Second operand has 39 states, 38 states have (on average 2.710526315789474) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:23,207 INFO L93 Difference]: Finished difference Result 743 states and 909 transitions. [2022-12-14 10:58:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:58:23,207 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.710526315789474) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-12-14 10:58:23,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:23,208 INFO L225 Difference]: With dead ends: 743 [2022-12-14 10:58:23,208 INFO L226 Difference]: Without dead ends: 743 [2022-12-14 10:58:23,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=639, Invalid=3783, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 10:58:23,209 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 497 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:23,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 461 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:58:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-12-14 10:58:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 568. [2022-12-14 10:58:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 566 states have (on average 1.2879858657243817) internal successors, (729), 567 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 729 transitions. [2022-12-14 10:58:23,219 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 729 transitions. Word has length 41 [2022-12-14 10:58:23,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:23,219 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 729 transitions. [2022-12-14 10:58:23,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.710526315789474) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 729 transitions. [2022-12-14 10:58:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 10:58:23,220 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:23,220 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:23,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 10:58:23,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:23,421 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:23,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1544799511, now seen corresponding path program 6 times [2022-12-14 10:58:23,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:23,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518897519] [2022-12-14 10:58:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:23,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:58:23,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:23,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518897519] [2022-12-14 10:58:23,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518897519] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:23,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271264521] [2022-12-14 10:58:23,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:58:23,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:23,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:23,717 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:23,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 10:58:23,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:58:23,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:58:23,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-14 10:58:23,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:23,902 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:23,943 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:58:23,943 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 16 treesize of output 22 [2022-12-14 10:58:23,946 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 7 treesize of output 3 [2022-12-14 10:58:24,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:24,758 INFO L321 Elim1Store]: treesize reduction 33, result has 52.2 percent of original size [2022-12-14 10:58:24,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 46 treesize of output 55 [2022-12-14 10:58:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:58:24,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:25,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:58:25,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 52 [2022-12-14 10:58:25,731 INFO L321 Elim1Store]: treesize reduction 8, result has 85.7 percent of original size [2022-12-14 10:58:25,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 142 [2022-12-14 10:58:25,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:58:25,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 115 [2022-12-14 10:58:26,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:58:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:58:26,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271264521] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:26,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180215891] [2022-12-14 10:58:26,468 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:26,468 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:26,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:26,468 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:26,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:26,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:26,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:26,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:58:26,543 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:26,565 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:26,587 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:26,615 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:26,616 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 24 [2022-12-14 10:58:27,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:30,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13370#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:30,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:30,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:30,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 53 [2022-12-14 10:58:30,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343916846] [2022-12-14 10:58:30,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:30,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 10:58:30,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:30,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 10:58:30,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=4219, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 10:58:30,074 INFO L87 Difference]: Start difference. First operand 568 states and 729 transitions. Second operand has 54 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 53 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:37,216 INFO L93 Difference]: Finished difference Result 1342 states and 1693 transitions. [2022-12-14 10:58:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-14 10:58:37,217 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 53 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-14 10:58:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:37,219 INFO L225 Difference]: With dead ends: 1342 [2022-12-14 10:58:37,219 INFO L226 Difference]: Without dead ends: 1077 [2022-12-14 10:58:37,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5399 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2746, Invalid=19010, Unknown=0, NotChecked=0, Total=21756 [2022-12-14 10:58:37,222 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1228 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 33 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:37,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 678 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2159 Invalid, 3 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 10:58:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-12-14 10:58:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 931. [2022-12-14 10:58:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 929 states have (on average 1.2981700753498386) internal successors, (1206), 930 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1206 transitions. [2022-12-14 10:58:37,240 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1206 transitions. Word has length 44 [2022-12-14 10:58:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:37,240 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1206 transitions. [2022-12-14 10:58:37,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 53 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1206 transitions. [2022-12-14 10:58:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 10:58:37,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:37,242 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:37,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 10:58:37,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:37,442 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:37,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:37,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1443844666, now seen corresponding path program 10 times [2022-12-14 10:58:37,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:37,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169466664] [2022-12-14 10:58:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:37,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:37,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:37,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169466664] [2022-12-14 10:58:37,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169466664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:37,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29259987] [2022-12-14 10:58:37,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:58:37,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:37,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:37,787 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:37,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 10:58:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:37,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 10:58:37,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:37,964 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 14 treesize of output 10 [2022-12-14 10:58:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:38,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:38,121 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 15 treesize of output 13 [2022-12-14 10:58:38,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:58:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:38,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29259987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:38,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498465719] [2022-12-14 10:58:38,196 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:38,196 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:38,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:38,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:38,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:38,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:38,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:38,242 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:38,265 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:38,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:38,320 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:38,346 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 14 treesize of output 10 [2022-12-14 10:58:38,378 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:38,403 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:38,439 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:38,440 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 24 [2022-12-14 10:58:38,578 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:40,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16114#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:40,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:40,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:40,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2022-12-14 10:58:40,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514448921] [2022-12-14 10:58:40,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:40,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 10:58:40,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:40,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 10:58:40,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 10:58:40,707 INFO L87 Difference]: Start difference. First operand 931 states and 1206 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:41,809 INFO L93 Difference]: Finished difference Result 1438 states and 1801 transitions. [2022-12-14 10:58:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 10:58:41,809 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-14 10:58:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:41,812 INFO L225 Difference]: With dead ends: 1438 [2022-12-14 10:58:41,812 INFO L226 Difference]: Without dead ends: 1297 [2022-12-14 10:58:41,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=508, Invalid=4748, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 10:58:41,813 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 552 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:41,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 879 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:58:41,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-12-14 10:58:41,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1136. [2022-12-14 10:58:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1134 states have (on average 1.3077601410934745) internal successors, (1483), 1135 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1483 transitions. [2022-12-14 10:58:41,825 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1483 transitions. Word has length 45 [2022-12-14 10:58:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:41,825 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1483 transitions. [2022-12-14 10:58:41,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1483 transitions. [2022-12-14 10:58:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 10:58:41,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:41,826 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:41,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 10:58:42,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 10:58:42,027 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:42,028 INFO L85 PathProgramCache]: Analyzing trace with hash 600914826, now seen corresponding path program 11 times [2022-12-14 10:58:42,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:42,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842766941] [2022-12-14 10:58:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 16 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:42,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:42,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842766941] [2022-12-14 10:58:42,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842766941] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:42,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292887279] [2022-12-14 10:58:42,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:58:42,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:42,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:42,419 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:42,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 10:58:42,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 10:58:42,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:58:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 10:58:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:42,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:42,995 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 7 treesize of output 5 [2022-12-14 10:58:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:43,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292887279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:43,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467810517] [2022-12-14 10:58:43,074 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:43,074 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:43,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:43,074 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:43,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:43,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:43,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:43,118 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:43,142 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:43,157 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:43,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:58:43,218 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:43,247 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:43,275 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:43,275 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 24 [2022-12-14 10:58:43,424 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:45,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19073#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:45,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:45,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:45,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-12-14 10:58:45,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302047727] [2022-12-14 10:58:45,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:45,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 10:58:45,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:45,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 10:58:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=2844, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 10:58:45,441 INFO L87 Difference]: Start difference. First operand 1136 states and 1483 transitions. Second operand has 43 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 43 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:46,556 INFO L93 Difference]: Finished difference Result 1495 states and 1872 transitions. [2022-12-14 10:58:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 10:58:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 43 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-14 10:58:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:46,560 INFO L225 Difference]: With dead ends: 1495 [2022-12-14 10:58:46,560 INFO L226 Difference]: Without dead ends: 1495 [2022-12-14 10:58:46,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=745, Invalid=4511, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 10:58:46,561 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 683 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1933 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:46,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 520 Invalid, 1935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1933 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:58:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2022-12-14 10:58:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1176. [2022-12-14 10:58:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1174 states have (on average 1.3126064735945486) internal successors, (1541), 1175 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1541 transitions. [2022-12-14 10:58:46,573 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1541 transitions. Word has length 47 [2022-12-14 10:58:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:46,573 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1541 transitions. [2022-12-14 10:58:46,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 43 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1541 transitions. [2022-12-14 10:58:46,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 10:58:46,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:46,574 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:46,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 10:58:46,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 10:58:46,775 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:46,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1966324114, now seen corresponding path program 1 times [2022-12-14 10:58:46,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:46,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687678417] [2022-12-14 10:58:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:46,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 10:58:46,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:46,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687678417] [2022-12-14 10:58:46,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687678417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:46,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577543024] [2022-12-14 10:58:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:46,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:46,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:46,881 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:46,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 10:58:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:46,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 10:58:46,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:47,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:47,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:58:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:47,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577543024] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:47,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084889139] [2022-12-14 10:58:47,370 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 10:58:47,371 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:47,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:47,371 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:47,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:47,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:47,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:47,417 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:47,446 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:47,464 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:47,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:58:47,526 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:47,546 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:47,580 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:47,580 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 24 [2022-12-14 10:58:47,844 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:49,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22105#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:49,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:49,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:49,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 27 [2022-12-14 10:58:49,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884653881] [2022-12-14 10:58:49,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:49,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 10:58:49,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 10:58:49,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 10:58:49,320 INFO L87 Difference]: Start difference. First operand 1176 states and 1541 transitions. Second operand has 27 states, 27 states have (on average 4.333333333333333) internal successors, (117), 27 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:51,535 INFO L93 Difference]: Finished difference Result 2009 states and 2465 transitions. [2022-12-14 10:58:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-14 10:58:51,536 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.333333333333333) internal successors, (117), 27 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 10:58:51,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:51,542 INFO L225 Difference]: With dead ends: 2009 [2022-12-14 10:58:51,542 INFO L226 Difference]: Without dead ends: 2009 [2022-12-14 10:58:51,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4151 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2297, Invalid=11745, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 10:58:51,543 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 562 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:51,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 247 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 10:58:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2022-12-14 10:58:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1140. [2022-12-14 10:58:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1138 states have (on average 1.2486818980667838) internal successors, (1421), 1139 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1421 transitions. [2022-12-14 10:58:51,556 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1421 transitions. Word has length 49 [2022-12-14 10:58:51,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:51,557 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 1421 transitions. [2022-12-14 10:58:51,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.333333333333333) internal successors, (117), 27 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1421 transitions. [2022-12-14 10:58:51,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 10:58:51,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:51,558 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:51,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 10:58:51,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 10:58:51,758 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash 485895059, now seen corresponding path program 12 times [2022-12-14 10:58:51,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:51,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057351346] [2022-12-14 10:58:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:51,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:52,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057351346] [2022-12-14 10:58:52,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057351346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831922318] [2022-12-14 10:58:52,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:58:52,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:52,158 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:52,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 10:58:52,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:58:52,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:58:52,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-14 10:58:52,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:52,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:52,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:52,541 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 15 treesize of output 13 [2022-12-14 10:58:52,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:58:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 19 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:52,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831922318] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:52,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1854723998] [2022-12-14 10:58:52,623 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:52,623 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:52,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:52,623 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:52,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:52,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:52,666 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:52,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:58:52,707 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:52,739 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:52,774 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:52,807 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:52,832 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:52,869 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:52,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:58:53,009 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:54,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25781#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:54,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:54,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:54,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2022-12-14 10:58:54,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980001846] [2022-12-14 10:58:54,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:54,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 10:58:54,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:54,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 10:58:54,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2259, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 10:58:54,983 INFO L87 Difference]: Start difference. First operand 1140 states and 1421 transitions. Second operand has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:56,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:58:56,190 INFO L93 Difference]: Finished difference Result 1673 states and 2036 transitions. [2022-12-14 10:58:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 10:58:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-14 10:58:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:58:56,192 INFO L225 Difference]: With dead ends: 1673 [2022-12-14 10:58:56,192 INFO L226 Difference]: Without dead ends: 1503 [2022-12-14 10:58:56,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=565, Invalid=5755, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 10:58:56,193 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 671 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:58:56,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 958 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:58:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2022-12-14 10:58:56,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1347. [2022-12-14 10:58:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1345 states have (on average 1.2572490706319703) internal successors, (1691), 1346 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 1691 transitions. [2022-12-14 10:58:56,205 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 1691 transitions. Word has length 51 [2022-12-14 10:58:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:58:56,205 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 1691 transitions. [2022-12-14 10:58:56,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 1691 transitions. [2022-12-14 10:58:56,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 10:58:56,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:58:56,206 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:58:56,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 10:58:56,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:56,407 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:58:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:58:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -371730205, now seen corresponding path program 13 times [2022-12-14 10:58:56,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:58:56,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601112815] [2022-12-14 10:58:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:58:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:58:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 25 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:56,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:58:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601112815] [2022-12-14 10:58:56,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601112815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:58:56,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715139859] [2022-12-14 10:58:56,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:58:56,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:58:56,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:58:56,806 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:58:56,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 10:58:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:58:56,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 10:58:56,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:58:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:57,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:58:57,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 10:58:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:58:57,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715139859] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:58:57,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479486037] [2022-12-14 10:58:57,508 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:58:57,508 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:58:57,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:58:57,509 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:58:57,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:58:57,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:58:57,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:58:57,561 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:57,588 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:57,605 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:57,643 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 11 treesize of output 7 [2022-12-14 10:58:57,675 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:57,699 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:58:57,735 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:58:57,736 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 24 [2022-12-14 10:58:57,870 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:58:59,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29228#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:58:59,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:58:59,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:58:59,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 40 [2022-12-14 10:58:59,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334079197] [2022-12-14 10:58:59,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:58:59,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 10:58:59,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:58:59,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 10:58:59,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2666, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 10:58:59,995 INFO L87 Difference]: Start difference. First operand 1347 states and 1691 transitions. Second operand has 41 states, 40 states have (on average 2.85) internal successors, (114), 41 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:59:01,145 INFO L93 Difference]: Finished difference Result 1688 states and 2053 transitions. [2022-12-14 10:59:01,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 10:59:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.85) internal successors, (114), 41 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-12-14 10:59:01,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:59:01,148 INFO L225 Difference]: With dead ends: 1688 [2022-12-14 10:59:01,148 INFO L226 Difference]: Without dead ends: 1688 [2022-12-14 10:59:01,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 114 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=754, Invalid=4502, Unknown=0, NotChecked=0, Total=5256 [2022-12-14 10:59:01,149 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 685 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 2358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:59:01,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 730 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2358 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:59:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2022-12-14 10:59:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1379. [2022-12-14 10:59:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1377 states have (on average 1.261437908496732) internal successors, (1737), 1378 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1737 transitions. [2022-12-14 10:59:01,162 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1737 transitions. Word has length 53 [2022-12-14 10:59:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:59:01,163 INFO L495 AbstractCegarLoop]: Abstraction has 1379 states and 1737 transitions. [2022-12-14 10:59:01,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.85) internal successors, (114), 41 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:01,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1737 transitions. [2022-12-14 10:59:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 10:59:01,164 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:59:01,164 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:59:01,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 10:59:01,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-14 10:59:01,364 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:59:01,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:59:01,365 INFO L85 PathProgramCache]: Analyzing trace with hash -360393386, now seen corresponding path program 1 times [2022-12-14 10:59:01,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:59:01,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516309622] [2022-12-14 10:59:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:59:01,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:59:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 29 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:01,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:59:01,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516309622] [2022-12-14 10:59:01,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516309622] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:59:01,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076584759] [2022-12-14 10:59:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:59:01,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:01,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:59:01,752 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:59:01,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 10:59:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 76 conjunts are in the unsatisfiable core [2022-12-14 10:59:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:02,017 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:02,072 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:59:02,072 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 16 treesize of output 22 [2022-12-14 10:59:02,076 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 7 treesize of output 3 [2022-12-14 10:59:02,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:59:02,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:59:02,778 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 10:59:02,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2022-12-14 10:59:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 29 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:02,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:59:03,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:59:03,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-12-14 10:59:03,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:59:03,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 57 [2022-12-14 10:59:03,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:59:03,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:59:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 31 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:03,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076584759] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:59:03,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [463800592] [2022-12-14 10:59:03,416 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:59:03,417 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:59:03,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:59:03,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:59:03,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:59:03,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:59:03,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:59:03,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:59:03,482 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:03,504 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:03,533 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:03,560 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 85 treesize of output 77 [2022-12-14 10:59:03,591 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:03,603 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:03,631 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:59:03,631 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 24 [2022-12-14 10:59:04,064 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:59:06,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32721#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 10:59:06,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:59:06,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:59:06,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 45 [2022-12-14 10:59:06,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234199628] [2022-12-14 10:59:06,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:59:06,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 10:59:06,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:59:06,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 10:59:06,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3443, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 10:59:06,923 INFO L87 Difference]: Start difference. First operand 1379 states and 1737 transitions. Second operand has 46 states, 46 states have (on average 2.760869565217391) internal successors, (127), 45 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:59:09,085 INFO L93 Difference]: Finished difference Result 2975 states and 3721 transitions. [2022-12-14 10:59:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 10:59:09,085 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.760869565217391) internal successors, (127), 45 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-14 10:59:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:59:09,088 INFO L225 Difference]: With dead ends: 2975 [2022-12-14 10:59:09,088 INFO L226 Difference]: Without dead ends: 1808 [2022-12-14 10:59:09,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=737, Invalid=8193, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 10:59:09,088 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 916 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:59:09,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1035 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:59:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2022-12-14 10:59:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1445. [2022-12-14 10:59:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1443 states have (on average 1.2626472626472627) internal successors, (1822), 1444 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 1822 transitions. [2022-12-14 10:59:09,101 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 1822 transitions. Word has length 56 [2022-12-14 10:59:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:59:09,101 INFO L495 AbstractCegarLoop]: Abstraction has 1445 states and 1822 transitions. [2022-12-14 10:59:09,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.760869565217391) internal successors, (127), 45 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 1822 transitions. [2022-12-14 10:59:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 10:59:09,102 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:59:09,102 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:59:09,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 10:59:09,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 10:59:09,303 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:59:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:59:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash 424440940, now seen corresponding path program 14 times [2022-12-14 10:59:09,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:59:09,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072702088] [2022-12-14 10:59:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:59:09,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:59:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:09,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:59:09,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072702088] [2022-12-14 10:59:09,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072702088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:59:09,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073980429] [2022-12-14 10:59:09,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:59:09,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:09,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:59:09,733 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:59:09,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 10:59:09,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 10:59:09,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:59:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 10:59:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:10,097 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:10,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:59:10,267 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 15 treesize of output 13 [2022-12-14 10:59:10,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 10:59:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:10,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073980429] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:59:10,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945154955] [2022-12-14 10:59:10,353 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:59:10,353 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:59:10,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:59:10,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:59:10,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:59:10,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:59:10,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:59:10,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:59:10,422 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:10,440 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:10,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:59:10,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:59:10,519 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:10,551 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:59:10,552 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 24 [2022-12-14 10:59:10,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:59:12,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37599#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:59:12,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:59:12,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:59:12,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 39 [2022-12-14 10:59:12,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36019551] [2022-12-14 10:59:12,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:59:12,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 10:59:12,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:59:12,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 10:59:12,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2557, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 10:59:12,598 INFO L87 Difference]: Start difference. First operand 1445 states and 1822 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:59:14,292 INFO L93 Difference]: Finished difference Result 2131 states and 2618 transitions. [2022-12-14 10:59:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 10:59:14,293 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-12-14 10:59:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:59:14,297 INFO L225 Difference]: With dead ends: 2131 [2022-12-14 10:59:14,297 INFO L226 Difference]: Without dead ends: 1857 [2022-12-14 10:59:14,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=622, Invalid=6860, Unknown=0, NotChecked=0, Total=7482 [2022-12-14 10:59:14,297 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 716 mSDsluCounter, 1323 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 3455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:59:14,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1402 Invalid, 3455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 10:59:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-12-14 10:59:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1674. [2022-12-14 10:59:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1672 states have (on average 1.270334928229665) internal successors, (2124), 1673 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:14,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2124 transitions. [2022-12-14 10:59:14,310 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2124 transitions. Word has length 57 [2022-12-14 10:59:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:59:14,310 INFO L495 AbstractCegarLoop]: Abstraction has 1674 states and 2124 transitions. [2022-12-14 10:59:14,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:14,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2124 transitions. [2022-12-14 10:59:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 10:59:14,311 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:59:14,311 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:59:14,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-14 10:59:14,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:14,512 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:59:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:59:14,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1759366964, now seen corresponding path program 2 times [2022-12-14 10:59:14,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:59:14,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339891484] [2022-12-14 10:59:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:59:14,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:59:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 9 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:14,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:59:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339891484] [2022-12-14 10:59:14,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339891484] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:59:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080159788] [2022-12-14 10:59:14,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:59:14,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:59:14,749 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:59:14,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 10:59:14,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:59:14,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:59:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 10:59:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:15,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:59:15,420 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 7 treesize of output 5 [2022-12-14 10:59:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:15,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080159788] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:59:15,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183248884] [2022-12-14 10:59:15,497 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 10:59:15,497 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:59:15,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:59:15,497 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:59:15,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:59:15,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:59:15,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:59:15,544 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:15,580 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:15,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:59:15,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:59:15,676 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:15,699 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:15,746 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:59:15,747 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 24 [2022-12-14 10:59:15,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:59:17,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41865#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:59:17,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:59:17,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:59:17,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-12-14 10:59:17,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777893871] [2022-12-14 10:59:17,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:59:17,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 10:59:17,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:59:17,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 10:59:17,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 10:59:17,778 INFO L87 Difference]: Start difference. First operand 1674 states and 2124 transitions. Second operand has 37 states, 36 states have (on average 4.416666666666667) internal successors, (159), 36 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:18,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:59:18,252 INFO L93 Difference]: Finished difference Result 2450 states and 3090 transitions. [2022-12-14 10:59:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 10:59:18,252 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.416666666666667) internal successors, (159), 36 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-14 10:59:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:59:18,255 INFO L225 Difference]: With dead ends: 2450 [2022-12-14 10:59:18,256 INFO L226 Difference]: Without dead ends: 2450 [2022-12-14 10:59:18,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=580, Invalid=3452, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 10:59:18,256 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 482 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:59:18,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 481 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:59:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2022-12-14 10:59:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 1945. [2022-12-14 10:59:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1943 states have (on average 1.2702007205352548) internal successors, (2468), 1944 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2468 transitions. [2022-12-14 10:59:18,276 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2468 transitions. Word has length 58 [2022-12-14 10:59:18,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:59:18,276 INFO L495 AbstractCegarLoop]: Abstraction has 1945 states and 2468 transitions. [2022-12-14 10:59:18,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.416666666666667) internal successors, (159), 36 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2468 transitions. [2022-12-14 10:59:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 10:59:18,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:59:18,277 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:59:18,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 10:59:18,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 10:59:18,478 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:59:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:59:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash 392881596, now seen corresponding path program 15 times [2022-12-14 10:59:18,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:59:18,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471258065] [2022-12-14 10:59:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:59:18,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:59:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 36 proven. 148 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:18,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:59:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471258065] [2022-12-14 10:59:18,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471258065] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:59:18,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110290088] [2022-12-14 10:59:18,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:59:18,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:18,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:59:18,913 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:59:18,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 10:59:19,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:59:19,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:59:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 10:59:19,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:19,043 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:59:19,043 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 10:59:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 49 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:19,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:59:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 49 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:19,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110290088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:59:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894984491] [2022-12-14 10:59:19,660 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:59:19,660 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:59:19,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:59:19,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:59:19,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:59:19,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:59:19,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:59:19,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 10:59:19,742 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:19,780 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:19,811 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:19,839 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 85 treesize of output 77 [2022-12-14 10:59:19,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:59:19,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:59:19,918 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:59:19,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:59:20,149 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:59:22,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46702#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:59:22,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:59:22,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:59:22,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 53 [2022-12-14 10:59:22,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729246645] [2022-12-14 10:59:22,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:59:22,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 10:59:22,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:59:22,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 10:59:22,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=4080, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 10:59:22,738 INFO L87 Difference]: Start difference. First operand 1945 states and 2468 transitions. Second operand has 54 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 54 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:24,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:59:24,293 INFO L93 Difference]: Finished difference Result 2426 states and 2977 transitions. [2022-12-14 10:59:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 10:59:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 54 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-14 10:59:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:59:24,297 INFO L225 Difference]: With dead ends: 2426 [2022-12-14 10:59:24,297 INFO L226 Difference]: Without dead ends: 2426 [2022-12-14 10:59:24,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1169, Invalid=6487, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 10:59:24,297 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 874 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:59:24,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 803 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2707 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:59:24,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2022-12-14 10:59:24,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1985. [2022-12-14 10:59:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1983 states have (on average 1.2738275340393344) internal successors, (2526), 1984 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 2526 transitions. [2022-12-14 10:59:24,319 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 2526 transitions. Word has length 59 [2022-12-14 10:59:24,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:59:24,319 INFO L495 AbstractCegarLoop]: Abstraction has 1985 states and 2526 transitions. [2022-12-14 10:59:24,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.7358490566037736) internal successors, (145), 54 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 2526 transitions. [2022-12-14 10:59:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 10:59:24,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:59:24,320 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:59:24,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-14 10:59:24,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-14 10:59:24,522 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:59:24,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:59:24,523 INFO L85 PathProgramCache]: Analyzing trace with hash -93623099, now seen corresponding path program 16 times [2022-12-14 10:59:24,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:59:24,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958539248] [2022-12-14 10:59:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:59:24,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:59:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:25,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:59:25,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958539248] [2022-12-14 10:59:25,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958539248] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:59:25,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128290632] [2022-12-14 10:59:25,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:59:25,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:59:25,071 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:59:25,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 10:59:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:25,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 73 conjunts are in the unsatisfiable core [2022-12-14 10:59:25,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:25,434 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:25,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:59:25,873 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 15 treesize of output 13 [2022-12-14 10:59:25,876 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 24 treesize of output 20 [2022-12-14 10:59:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 192 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:26,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128290632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:59:26,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10296050] [2022-12-14 10:59:26,404 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:59:26,404 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:59:26,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:59:26,404 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:59:26,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:59:26,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:59:26,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:59:26,446 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:26,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:59:26,500 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:26,530 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:26,561 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:26,592 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:26,623 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:26,659 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:59:26,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 10:59:26,825 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:59:29,905 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51600#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.offset|) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:59:29,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:59:29,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:59:29,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 60 [2022-12-14 10:59:29,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550282178] [2022-12-14 10:59:29,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:59:29,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-14 10:59:29,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:59:29,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-14 10:59:29,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=5230, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 10:59:29,906 INFO L87 Difference]: Start difference. First operand 1985 states and 2526 transitions. Second operand has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:32,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:59:32,906 INFO L93 Difference]: Finished difference Result 2835 states and 3517 transitions. [2022-12-14 10:59:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 10:59:32,907 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-14 10:59:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:59:32,910 INFO L225 Difference]: With dead ends: 2835 [2022-12-14 10:59:32,910 INFO L226 Difference]: Without dead ends: 2530 [2022-12-14 10:59:32,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3439 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=884, Invalid=11772, Unknown=0, NotChecked=0, Total=12656 [2022-12-14 10:59:32,911 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 1147 mSDsluCounter, 2322 mSDsCounter, 0 mSdLazyCounter, 5750 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1147 SdHoareTripleChecker+Valid, 2412 SdHoareTripleChecker+Invalid, 5766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:59:32,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1147 Valid, 2412 Invalid, 5766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5750 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 10:59:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2022-12-14 10:59:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2282. [2022-12-14 10:59:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2280 states have (on average 1.2815789473684212) internal successors, (2922), 2281 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:32,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 2922 transitions. [2022-12-14 10:59:32,926 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 2922 transitions. Word has length 63 [2022-12-14 10:59:32,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:59:32,927 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 2922 transitions. [2022-12-14 10:59:32,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 60 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:32,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 2922 transitions. [2022-12-14 10:59:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 10:59:32,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:59:32,928 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 10:59:32,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 10:59:33,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:33,128 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:59:33,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:59:33,129 INFO L85 PathProgramCache]: Analyzing trace with hash 964592309, now seen corresponding path program 7 times [2022-12-14 10:59:33,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:59:33,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050713498] [2022-12-14 10:59:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:59:33,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:59:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 36 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:59:33,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:59:33,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050713498] [2022-12-14 10:59:33,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050713498] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:59:33,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660996793] [2022-12-14 10:59:33,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 10:59:33,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:33,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:59:33,545 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:59:33,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 10:59:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 10:59:33,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:33,881 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 14 treesize of output 10 [2022-12-14 10:59:33,932 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:59:33,933 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 16 treesize of output 22 [2022-12-14 10:59:33,935 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 7 treesize of output 3 [2022-12-14 10:59:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:59:34,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:59:34,867 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 10:59:34,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2022-12-14 10:59:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 36 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:59:34,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:59:35,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:59:35,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-12-14 10:59:35,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:59:35,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 57 [2022-12-14 10:59:35,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:59:35,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 10:59:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 38 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:59:35,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660996793] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:59:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422740242] [2022-12-14 10:59:35,817 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:59:35,817 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:59:35,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:59:35,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:59:35,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:59:35,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:59:35,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:59:35,865 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:35,888 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:35,902 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:35,938 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:35,967 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:59:35,967 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 24 [2022-12-14 10:59:36,256 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:59:39,806 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57240#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:59:39,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:59:39,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:59:39,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 54 [2022-12-14 10:59:39,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180247695] [2022-12-14 10:59:39,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:59:39,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-14 10:59:39,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:59:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-14 10:59:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4334, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 10:59:39,807 INFO L87 Difference]: Start difference. First operand 2282 states and 2922 transitions. Second operand has 55 states, 55 states have (on average 2.690909090909091) internal successors, (148), 54 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:59:44,905 INFO L93 Difference]: Finished difference Result 4985 states and 6357 transitions. [2022-12-14 10:59:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 10:59:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.690909090909091) internal successors, (148), 54 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-12-14 10:59:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:59:44,909 INFO L225 Difference]: With dead ends: 4985 [2022-12-14 10:59:44,909 INFO L226 Difference]: Without dead ends: 2942 [2022-12-14 10:59:44,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3369 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1195, Invalid=14057, Unknown=0, NotChecked=0, Total=15252 [2022-12-14 10:59:44,910 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1616 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 3695 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 3710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 10:59:44,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1616 Valid, 1975 Invalid, 3710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3695 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 10:59:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2022-12-14 10:59:44,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2356. [2022-12-14 10:59:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2354 states have (on average 1.2816482582837723) internal successors, (3017), 2355 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 3017 transitions. [2022-12-14 10:59:44,930 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 3017 transitions. Word has length 64 [2022-12-14 10:59:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:59:44,930 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 3017 transitions. [2022-12-14 10:59:44,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.690909090909091) internal successors, (148), 54 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 3017 transitions. [2022-12-14 10:59:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 10:59:44,932 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:59:44,932 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:59:44,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-14 10:59:45,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:45,133 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 10:59:45,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:59:45,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1843158507, now seen corresponding path program 17 times [2022-12-14 10:59:45,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:59:45,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877621260] [2022-12-14 10:59:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:59:45,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:59:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:59:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 49 proven. 185 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:59:45,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:59:45,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877621260] [2022-12-14 10:59:45,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877621260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:59:45,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531935562] [2022-12-14 10:59:45,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:59:45,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:45,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:59:45,732 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:59:45,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 10:59:46,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 10:59:46,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:59:46,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 10:59:46,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:46,117 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:59:46,117 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 10:59:46,351 INFO L350 Elim1Store]: Elim1 eliminated variable 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 17 treesize of output 13 [2022-12-14 10:59:47,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:59:47,989 INFO L321 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-12-14 10:59:47,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 32 treesize of output 23 [2022-12-14 10:59:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 61 proven. 26 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-12-14 10:59:48,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:59:48,770 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 29 treesize of output 25 [2022-12-14 10:59:48,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-12-14 10:59:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 8 proven. 79 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-12-14 10:59:49,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531935562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:59:49,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973962557] [2022-12-14 10:59:49,021 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 10:59:49,021 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:59:49,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:59:49,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:59:49,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:59:49,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:59:49,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 10:59:49,065 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:49,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:59:49,114 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:49,150 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 11 treesize of output 7 [2022-12-14 10:59:49,177 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 10:59:49,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 10:59:49,237 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 10:59:49,237 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 24 [2022-12-14 10:59:49,386 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:59:51,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65142#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (< (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1)) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 10:59:51,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:59:51,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:59:51,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 50 [2022-12-14 10:59:51,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793520971] [2022-12-14 10:59:51,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:59:51,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 10:59:51,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:59:51,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 10:59:51,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3890, Unknown=1, NotChecked=0, Total=4290 [2022-12-14 10:59:51,843 INFO L87 Difference]: Start difference. First operand 2356 states and 3017 transitions. Second operand has 52 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:00:30,390 INFO L93 Difference]: Finished difference Result 3579 states and 4232 transitions. [2022-12-14 11:00:30,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-12-14 11:00:30,390 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-12-14 11:00:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:00:30,394 INFO L225 Difference]: With dead ends: 3579 [2022-12-14 11:00:30,394 INFO L226 Difference]: Without dead ends: 2890 [2022-12-14 11:00:30,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10621 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=9126, Invalid=34763, Unknown=1, NotChecked=0, Total=43890 [2022-12-14 11:00:30,397 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 765 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 5784 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 5803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:00:30,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 303 Invalid, 5803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5784 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 11:00:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2890 states. [2022-12-14 11:00:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2890 to 1828. [2022-12-14 11:00:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1828 states, 1827 states have (on average 1.2627257799671592) internal successors, (2307), 1827 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 2307 transitions. [2022-12-14 11:00:30,414 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 2307 transitions. Word has length 65 [2022-12-14 11:00:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:00:30,415 INFO L495 AbstractCegarLoop]: Abstraction has 1828 states and 2307 transitions. [2022-12-14 11:00:30,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 2307 transitions. [2022-12-14 11:00:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 11:00:30,416 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:00:30,416 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 11:00:30,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 11:00:30,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:00:30,617 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:00:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:00:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1541666773, now seen corresponding path program 8 times [2022-12-14 11:00:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:00:30,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845113903] [2022-12-14 11:00:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:00:30,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:00:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:00:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:30,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:00:30,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845113903] [2022-12-14 11:00:30,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845113903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:00:30,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229651878] [2022-12-14 11:00:30,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:00:30,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:00:30,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:00:30,962 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:00:30,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 11:00:31,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 11:00:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:00:31,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 11:00:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:00:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:31,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:00:31,813 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 7 treesize of output 5 [2022-12-14 11:00:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 25 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:31,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229651878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:00:31,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1129672870] [2022-12-14 11:00:31,901 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:00:31,901 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:00:31,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:00:31,901 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:00:31,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:00:31,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:00:31,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:00:31,947 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:31,977 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:31,995 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:32,026 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:32,062 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:00:32,063 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 24 [2022-12-14 11:00:32,338 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:00:34,720 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71283#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:00:34,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:00:34,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:00:34,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2022-12-14 11:00:34,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131768945] [2022-12-14 11:00:34,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:00:34,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 11:00:34,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:00:34,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 11:00:34,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=2636, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 11:00:34,721 INFO L87 Difference]: Start difference. First operand 1828 states and 2307 transitions. Second operand has 42 states, 41 states have (on average 4.463414634146342) internal successors, (183), 41 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:00:35,089 INFO L93 Difference]: Finished difference Result 2409 states and 3038 transitions. [2022-12-14 11:00:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 11:00:35,090 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.463414634146342) internal successors, (183), 41 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-14 11:00:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:00:35,094 INFO L225 Difference]: With dead ends: 2409 [2022-12-14 11:00:35,094 INFO L226 Difference]: Without dead ends: 2409 [2022-12-14 11:00:35,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 13 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=610, Invalid=3550, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 11:00:35,094 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 764 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:00:35,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 256 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:00:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2022-12-14 11:00:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2128. [2022-12-14 11:00:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 2127 states have (on average 1.2609308885754584) internal successors, (2682), 2127 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 2682 transitions. [2022-12-14 11:00:35,119 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 2682 transitions. Word has length 66 [2022-12-14 11:00:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:00:35,120 INFO L495 AbstractCegarLoop]: Abstraction has 2128 states and 2682 transitions. [2022-12-14 11:00:35,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.463414634146342) internal successors, (183), 41 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:35,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 2682 transitions. [2022-12-14 11:00:35,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 11:00:35,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:00:35,122 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 11:00:35,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 11:00:35,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-14 11:00:35,323 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:00:35,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:00:35,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1354553796, now seen corresponding path program 9 times [2022-12-14 11:00:35,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:00:35,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745452285] [2022-12-14 11:00:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:00:35,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:00:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:00:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:35,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:00:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745452285] [2022-12-14 11:00:35,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745452285] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:00:35,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116716216] [2022-12-14 11:00:35,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:00:35,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:00:35,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:00:35,840 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:00:35,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 11:00:36,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:00:36,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:00:36,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-14 11:00:36,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:00:36,255 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:36,306 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:00:36,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 11:00:36,311 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 7 treesize of output 3 [2022-12-14 11:00:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:00:37,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:00:37,471 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-14 11:00:37,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 21 [2022-12-14 11:00:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 43 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:37,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:00:37,733 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (v_ArrVal_1284 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1284) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (not (= (select v_ArrVal_1284 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) 0)) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-12-14 11:00:37,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:00:37,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-12-14 11:00:37,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:00:37,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 57 [2022-12-14 11:00:37,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:00:37,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 11:00:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 45 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:38,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116716216] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:00:38,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1302466291] [2022-12-14 11:00:38,445 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:00:38,445 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:00:38,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:00:38,446 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:00:38,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:00:38,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:00:38,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:00:38,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:00:38,529 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:38,549 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:38,585 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:38,620 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:00:38,620 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 24 [2022-12-14 11:00:39,089 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:00:42,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '76348#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:00:42,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:00:42,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:00:42,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 56 [2022-12-14 11:00:42,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960918923] [2022-12-14 11:00:42,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:00:42,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 11:00:42,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:00:42,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 11:00:42,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=4602, Unknown=1, NotChecked=136, Total=4970 [2022-12-14 11:00:42,843 INFO L87 Difference]: Start difference. First operand 2128 states and 2682 transitions. Second operand has 57 states, 57 states have (on average 2.912280701754386) internal successors, (166), 56 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:00:46,685 INFO L93 Difference]: Finished difference Result 5056 states and 6374 transitions. [2022-12-14 11:00:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 11:00:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.912280701754386) internal successors, (166), 56 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-12-14 11:00:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:00:46,689 INFO L225 Difference]: With dead ends: 5056 [2022-12-14 11:00:46,689 INFO L226 Difference]: Without dead ends: 2131 [2022-12-14 11:00:46,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=871, Invalid=11788, Unknown=1, NotChecked=222, Total=12882 [2022-12-14 11:00:46,691 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1313 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 2561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:00:46,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1313 Valid, 820 Invalid, 2561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2404 Invalid, 0 Unknown, 148 Unchecked, 1.1s Time] [2022-12-14 11:00:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2022-12-14 11:00:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 2130. [2022-12-14 11:00:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2129 states have (on average 1.2606857679661814) internal successors, (2684), 2129 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 2684 transitions. [2022-12-14 11:00:46,705 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 2684 transitions. Word has length 74 [2022-12-14 11:00:46,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:00:46,705 INFO L495 AbstractCegarLoop]: Abstraction has 2130 states and 2684 transitions. [2022-12-14 11:00:46,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.912280701754386) internal successors, (166), 56 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 2684 transitions. [2022-12-14 11:00:46,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 11:00:46,706 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:00:46,706 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 11:00:46,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 11:00:46,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-14 11:00:46,906 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:00:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:00:46,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1298301882, now seen corresponding path program 10 times [2022-12-14 11:00:46,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:00:46,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186166263] [2022-12-14 11:00:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:00:46,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:00:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:00:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 25 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:47,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:00:47,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186166263] [2022-12-14 11:00:47,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186166263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:00:47,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199186235] [2022-12-14 11:00:47,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:00:47,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:00:47,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:00:47,250 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:00:47,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 11:00:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:00:47,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 11:00:47,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:00:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 36 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:47,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:00:47,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:00:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 36 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:48,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199186235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:00:48,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724532518] [2022-12-14 11:00:48,102 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:00:48,102 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:00:48,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:00:48,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:00:48,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:00:48,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:00:48,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:00:48,149 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:48,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:00:48,194 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:48,228 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:48,266 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:00:48,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 11:00:48,560 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:00:51,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '84124#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:00:51,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:00:51,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:00:51,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 38 [2022-12-14 11:00:51,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580018827] [2022-12-14 11:00:51,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:00:51,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 11:00:51,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:00:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 11:00:51,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2481, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 11:00:51,374 INFO L87 Difference]: Start difference. First operand 2130 states and 2684 transitions. Second operand has 40 states, 39 states have (on average 4.153846153846154) internal successors, (162), 39 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:00:51,921 INFO L93 Difference]: Finished difference Result 2711 states and 3415 transitions. [2022-12-14 11:00:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 11:00:51,922 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.153846153846154) internal successors, (162), 39 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-12-14 11:00:51,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:00:51,924 INFO L225 Difference]: With dead ends: 2711 [2022-12-14 11:00:51,924 INFO L226 Difference]: Without dead ends: 2711 [2022-12-14 11:00:51,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 177 SyntacticMatches, 15 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=567, Invalid=3465, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 11:00:51,925 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 738 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:00:51,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 417 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:00:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2022-12-14 11:00:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2430. [2022-12-14 11:00:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 2429 states have (on average 1.2593659942363113) internal successors, (3059), 2429 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 3059 transitions. [2022-12-14 11:00:51,942 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 3059 transitions. Word has length 76 [2022-12-14 11:00:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:00:51,942 INFO L495 AbstractCegarLoop]: Abstraction has 2430 states and 3059 transitions. [2022-12-14 11:00:51,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.153846153846154) internal successors, (162), 39 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 3059 transitions. [2022-12-14 11:00:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-14 11:00:51,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:00:51,943 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 11:00:51,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-14 11:00:52,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:00:52,144 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:00:52,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:00:52,144 INFO L85 PathProgramCache]: Analyzing trace with hash 127030867, now seen corresponding path program 11 times [2022-12-14 11:00:52,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:00:52,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073034067] [2022-12-14 11:00:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:00:52,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:00:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:00:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 50 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:52,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:00:52,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073034067] [2022-12-14 11:00:52,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073034067] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:00:52,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52155399] [2022-12-14 11:00:52,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:00:52,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:00:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:00:52,983 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:00:52,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 11:00:53,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 11:00:53,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:00:53,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-14 11:00:53,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:00:53,270 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 10 treesize of output 8 [2022-12-14 11:00:53,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:00:53,646 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 17 treesize of output 19 [2022-12-14 11:00:53,940 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 11:00:53,940 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 29 treesize of output 13 [2022-12-14 11:00:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 8 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:53,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:00:54,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:00:54,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-12-14 11:00:54,868 INFO L321 Elim1Store]: treesize reduction 4, result has 89.2 percent of original size [2022-12-14 11:00:54,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 110 [2022-12-14 11:00:54,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:00:54,878 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 74 treesize of output 70 [2022-12-14 11:00:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 8 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:00:55,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52155399] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:00:55,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1067124811] [2022-12-14 11:00:55,172 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:00:55,172 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:00:55,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:00:55,172 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:00:55,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:00:55,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:00:55,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:00:55,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:00:55,234 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:55,247 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:55,276 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:00:55,309 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:00:55,309 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 24 [2022-12-14 11:00:55,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:00:59,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '89855#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:00:59,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:00:59,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:00:59,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 56 [2022-12-14 11:00:59,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630246959] [2022-12-14 11:00:59,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:00:59,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 11:00:59,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:00:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 11:00:59,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4578, Unknown=44, NotChecked=0, Total=4830 [2022-12-14 11:00:59,107 INFO L87 Difference]: Start difference. First operand 2430 states and 3059 transitions. Second operand has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:01,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:01,975 INFO L93 Difference]: Finished difference Result 4565 states and 5711 transitions. [2022-12-14 11:01:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 11:01:01,975 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-12-14 11:01:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:01:01,977 INFO L225 Difference]: With dead ends: 4565 [2022-12-14 11:01:01,977 INFO L226 Difference]: Without dead ends: 2433 [2022-12-14 11:01:01,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 197 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=593, Invalid=9861, Unknown=52, NotChecked=0, Total=10506 [2022-12-14 11:01:01,978 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 539 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 2670 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 2685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:01:01,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1306 Invalid, 2685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2670 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 11:01:01,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2022-12-14 11:01:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 2432. [2022-12-14 11:01:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 1.2591526120937886) internal successors, (3061), 2431 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 3061 transitions. [2022-12-14 11:01:01,993 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 3061 transitions. Word has length 84 [2022-12-14 11:01:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:01,993 INFO L495 AbstractCegarLoop]: Abstraction has 2432 states and 3061 transitions. [2022-12-14 11:01:01,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 56 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 3061 transitions. [2022-12-14 11:01:01,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 11:01:01,994 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:01,994 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:01,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-14 11:01:02,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-14 11:01:02,195 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:01:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:02,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1203537097, now seen corresponding path program 12 times [2022-12-14 11:01:02,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:01:02,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644459099] [2022-12-14 11:01:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:02,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:01:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 36 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:02,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:01:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644459099] [2022-12-14 11:01:02,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644459099] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:01:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366336495] [2022-12-14 11:01:02,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:01:02,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:02,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:02,688 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:02,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 11:01:02,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:01:02,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:01:02,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 11:01:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 49 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:03,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:01:03,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:01:03,716 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 49 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:03,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366336495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:01:03,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1750850950] [2022-12-14 11:01:03,717 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:01:03,717 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:01:03,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:01:03,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:01:03,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:01:03,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:03,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:01:03,763 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:03,787 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:03,802 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:03,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:01:03,866 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:01:03,866 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 24 [2022-12-14 11:01:04,128 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:01:06,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '97485#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:01:06,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:01:06,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:01:06,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 42 [2022-12-14 11:01:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662221488] [2022-12-14 11:01:06,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:01:06,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 11:01:06,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:01:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 11:01:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2878, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 11:01:06,779 INFO L87 Difference]: Start difference. First operand 2432 states and 3061 transitions. Second operand has 44 states, 43 states have (on average 4.232558139534884) internal successors, (182), 43 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:07,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:07,530 INFO L93 Difference]: Finished difference Result 3013 states and 3792 transitions. [2022-12-14 11:01:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 11:01:07,530 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.232558139534884) internal successors, (182), 43 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-12-14 11:01:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:01:07,533 INFO L225 Difference]: With dead ends: 3013 [2022-12-14 11:01:07,533 INFO L226 Difference]: Without dead ends: 3013 [2022-12-14 11:01:07,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 203 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=663, Invalid=4029, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 11:01:07,534 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1017 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:01:07,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 552 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:01:07,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2022-12-14 11:01:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2732. [2022-12-14 11:01:07,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 1.258147198828268) internal successors, (3436), 2731 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:07,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 3436 transitions. [2022-12-14 11:01:07,553 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 3436 transitions. Word has length 86 [2022-12-14 11:01:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:07,553 INFO L495 AbstractCegarLoop]: Abstraction has 2732 states and 3436 transitions. [2022-12-14 11:01:07,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.232558139534884) internal successors, (182), 43 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 3436 transitions. [2022-12-14 11:01:07,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 11:01:07,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:07,554 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:07,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 11:01:07,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-14 11:01:07,756 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:01:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash -60958622, now seen corresponding path program 13 times [2022-12-14 11:01:07,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:01:07,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810732673] [2022-12-14 11:01:07,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:07,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:01:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 57 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:08,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:01:08,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810732673] [2022-12-14 11:01:08,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810732673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:01:08,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44326474] [2022-12-14 11:01:08,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:01:08,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:08,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:08,490 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:08,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 11:01:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:08,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 11:01:08,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:08,981 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:09,057 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-14 11:01:09,058 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 36 [2022-12-14 11:01:10,990 INFO L321 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2022-12-14 11:01:10,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 11:01:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 57 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:10,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:01:11,381 INFO L321 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2022-12-14 11:01:11,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 171 treesize of output 174 [2022-12-14 11:01:11,393 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:01:11,393 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 41 treesize of output 43 [2022-12-14 11:01:11,404 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 20 treesize of output 18 [2022-12-14 11:01:11,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:01:11,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 128 [2022-12-14 11:01:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 57 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:12,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44326474] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:01:12,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267145281] [2022-12-14 11:01:12,313 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:01:12,313 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:01:12,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:01:12,313 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:01:12,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:01:12,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:12,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:01:12,357 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:12,394 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:12,409 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:12,437 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:12,467 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:01:12,467 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 24 [2022-12-14 11:01:12,731 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:01:16,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '103891#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:01:16,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:01:16,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:01:16,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 27, 27] total 65 [2022-12-14 11:01:16,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764216715] [2022-12-14 11:01:16,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:01:16,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-14 11:01:16,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:01:16,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-14 11:01:16,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=5926, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 11:01:16,988 INFO L87 Difference]: Start difference. First operand 2732 states and 3436 transitions. Second operand has 66 states, 66 states have (on average 3.1666666666666665) internal successors, (209), 65 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:20,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:01:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:24,458 INFO L93 Difference]: Finished difference Result 5167 states and 6463 transitions. [2022-12-14 11:01:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 11:01:24,458 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.1666666666666665) internal successors, (209), 65 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-12-14 11:01:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:01:24,460 INFO L225 Difference]: With dead ends: 5167 [2022-12-14 11:01:24,460 INFO L226 Difference]: Without dead ends: 2735 [2022-12-14 11:01:24,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 217 SyntacticMatches, 9 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3307 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=947, Invalid=15823, Unknown=0, NotChecked=0, Total=16770 [2022-12-14 11:01:24,461 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1307 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 3541 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 3557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3541 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:01:24,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1307 Valid, 1618 Invalid, 3557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3541 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 11:01:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2022-12-14 11:01:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2734. [2022-12-14 11:01:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 1.2579582875960482) internal successors, (3438), 2733 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 3438 transitions. [2022-12-14 11:01:24,479 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 3438 transitions. Word has length 94 [2022-12-14 11:01:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:24,479 INFO L495 AbstractCegarLoop]: Abstraction has 2734 states and 3438 transitions. [2022-12-14 11:01:24,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.1666666666666665) internal successors, (209), 65 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 3438 transitions. [2022-12-14 11:01:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 11:01:24,481 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:24,481 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:24,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 11:01:24,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:24,682 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:01:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:24,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1234234200, now seen corresponding path program 14 times [2022-12-14 11:01:24,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:01:24,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785409174] [2022-12-14 11:01:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:24,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:01:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 49 proven. 329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:25,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:01:25,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785409174] [2022-12-14 11:01:25,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785409174] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:01:25,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539588309] [2022-12-14 11:01:25,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:01:25,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:25,199 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:25,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 11:01:25,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-14 11:01:25,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:01:25,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 11:01:25,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 64 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:25,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:01:26,395 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 7 treesize of output 5 [2022-12-14 11:01:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 64 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:26,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539588309] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:01:26,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952099862] [2022-12-14 11:01:26,547 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:01:26,547 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:01:26,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:01:26,547 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:01:26,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:01:26,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:26,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:01:26,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:01:26,613 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 14 treesize of output 10 [2022-12-14 11:01:26,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:01:26,658 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:26,685 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:01:26,685 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 24 [2022-12-14 11:01:27,177 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:01:29,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '112534#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:01:29,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:01:29,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:01:29,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 55 [2022-12-14 11:01:29,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352893285] [2022-12-14 11:01:29,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:01:29,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 11:01:29,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:01:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 11:01:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=4410, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 11:01:29,964 INFO L87 Difference]: Start difference. First operand 2734 states and 3438 transitions. Second operand has 57 states, 56 states have (on average 4.767857142857143) internal successors, (267), 56 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:30,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:30,467 INFO L93 Difference]: Finished difference Result 3315 states and 4169 transitions. [2022-12-14 11:01:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:01:30,467 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 4.767857142857143) internal successors, (267), 56 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-12-14 11:01:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:01:30,471 INFO L225 Difference]: With dead ends: 3315 [2022-12-14 11:01:30,471 INFO L226 Difference]: Without dead ends: 3315 [2022-12-14 11:01:30,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 228 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2638 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1040, Invalid=5932, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 11:01:30,472 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1046 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:01:30,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 458 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:01:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2022-12-14 11:01:30,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3034. [2022-12-14 11:01:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3033 states have (on average 1.2571711177052423) internal successors, (3813), 3033 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 3813 transitions. [2022-12-14 11:01:30,504 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 3813 transitions. Word has length 96 [2022-12-14 11:01:30,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:30,505 INFO L495 AbstractCegarLoop]: Abstraction has 3034 states and 3813 transitions. [2022-12-14 11:01:30,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 4.767857142857143) internal successors, (267), 56 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 3813 transitions. [2022-12-14 11:01:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-14 11:01:30,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:30,508 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:30,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 11:01:30,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-14 11:01:30,708 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:01:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash 10895345, now seen corresponding path program 15 times [2022-12-14 11:01:30,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:01:30,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558192871] [2022-12-14 11:01:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:30,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:01:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 64 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:31,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:01:31,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558192871] [2022-12-14 11:01:31,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558192871] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:01:31,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125145129] [2022-12-14 11:01:31,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:01:31,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:31,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:31,612 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:31,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 11:01:31,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:01:31,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:01:31,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 11:01:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:31,804 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 10 treesize of output 8 [2022-12-14 11:01:32,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:01:32,160 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 17 treesize of output 19 [2022-12-14 11:01:32,319 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 15 treesize of output 7 [2022-12-14 11:01:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 64 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:32,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:01:32,418 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1596 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1596) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 9 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-12-14 11:01:32,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:01:32,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 11:01:32,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:01:32,426 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 37 treesize of output 32 [2022-12-14 11:01:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 64 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:32,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125145129] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:01:32,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2080873694] [2022-12-14 11:01:32,587 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:01:32,587 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:01:32,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:01:32,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:01:32,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:01:32,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:32,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:01:32,632 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:32,666 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:32,678 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:32,709 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:32,745 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:01:32,745 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 24 [2022-12-14 11:01:33,045 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:01:36,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '119585#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:01:36,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:01:36,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:01:36,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2022-12-14 11:01:36,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071535913] [2022-12-14 11:01:36,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:01:36,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 11:01:36,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:01:36,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 11:01:36,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2907, Unknown=1, NotChecked=108, Total=3192 [2022-12-14 11:01:36,006 INFO L87 Difference]: Start difference. First operand 3034 states and 3813 transitions. Second operand has 44 states, 44 states have (on average 3.3636363636363638) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:37,635 INFO L93 Difference]: Finished difference Result 5769 states and 7215 transitions. [2022-12-14 11:01:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 11:01:37,635 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.3636363636363638) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-12-14 11:01:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:01:37,639 INFO L225 Difference]: With dead ends: 5769 [2022-12-14 11:01:37,639 INFO L226 Difference]: Without dead ends: 3037 [2022-12-14 11:01:37,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 267 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=392, Invalid=5617, Unknown=1, NotChecked=152, Total=6162 [2022-12-14 11:01:37,640 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 655 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 2325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:01:37,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1242 Invalid, 2325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2178 Invalid, 0 Unknown, 136 Unchecked, 0.9s Time] [2022-12-14 11:01:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2022-12-14 11:01:37,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 3036. [2022-12-14 11:01:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3036 states, 3035 states have (on average 1.257001647446458) internal successors, (3815), 3035 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3036 states to 3036 states and 3815 transitions. [2022-12-14 11:01:37,669 INFO L78 Accepts]: Start accepts. Automaton has 3036 states and 3815 transitions. Word has length 104 [2022-12-14 11:01:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:37,670 INFO L495 AbstractCegarLoop]: Abstraction has 3036 states and 3815 transitions. [2022-12-14 11:01:37,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.3636363636363638) internal successors, (148), 43 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:37,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3036 states and 3815 transitions. [2022-12-14 11:01:37,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-14 11:01:37,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:37,673 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:37,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 11:01:37,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:37,874 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:01:37,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash -764504217, now seen corresponding path program 16 times [2022-12-14 11:01:37,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:01:37,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772494193] [2022-12-14 11:01:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:37,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:01:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 64 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:38,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:01:38,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772494193] [2022-12-14 11:01:38,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772494193] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:01:38,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679106611] [2022-12-14 11:01:38,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:01:38,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:38,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:38,417 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:38,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 11:01:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:38,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 11:01:38,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 81 proven. 389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:39,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:01:39,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:01:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 81 proven. 389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:39,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679106611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:01:39,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015150173] [2022-12-14 11:01:39,524 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:01:39,525 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:01:39,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:01:39,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:01:39,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:01:39,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:39,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:01:39,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:01:39,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:01:39,627 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:39,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:01:39,693 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:01:39,693 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 24 [2022-12-14 11:01:40,181 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:01:43,155 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '129129#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:01:43,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:01:43,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:01:43,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 50 [2022-12-14 11:01:43,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639784246] [2022-12-14 11:01:43,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:01:43,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 11:01:43,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:01:43,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 11:01:43,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=3879, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 11:01:43,157 INFO L87 Difference]: Start difference. First operand 3036 states and 3815 transitions. Second operand has 52 states, 51 states have (on average 4.352941176470588) internal successors, (222), 51 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:43,899 INFO L93 Difference]: Finished difference Result 3617 states and 4546 transitions. [2022-12-14 11:01:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 11:01:43,899 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.352941176470588) internal successors, (222), 51 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-12-14 11:01:43,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:01:43,901 INFO L225 Difference]: With dead ends: 3617 [2022-12-14 11:01:43,901 INFO L226 Difference]: Without dead ends: 3617 [2022-12-14 11:01:43,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 264 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=889, Invalid=5431, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 11:01:43,902 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1023 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:01:43,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 752 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:01:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2022-12-14 11:01:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3336. [2022-12-14 11:01:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 1.2563718140929536) internal successors, (4190), 3335 states have internal predecessors, (4190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:43,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4190 transitions. [2022-12-14 11:01:43,935 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4190 transitions. Word has length 106 [2022-12-14 11:01:43,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:43,935 INFO L495 AbstractCegarLoop]: Abstraction has 3336 states and 4190 transitions. [2022-12-14 11:01:43,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.352941176470588) internal successors, (222), 51 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4190 transitions. [2022-12-14 11:01:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 11:01:43,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:43,939 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:43,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 11:01:44,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:44,141 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:01:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:44,142 INFO L85 PathProgramCache]: Analyzing trace with hash 119172352, now seen corresponding path program 17 times [2022-12-14 11:01:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:01:44,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695162712] [2022-12-14 11:01:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:01:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:45,013 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 71 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:45,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:01:45,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695162712] [2022-12-14 11:01:45,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695162712] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:01:45,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660073124] [2022-12-14 11:01:45,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:01:45,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:45,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:45,014 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:45,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 11:01:45,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 11:01:45,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:01:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 93 conjunts are in the unsatisfiable core [2022-12-14 11:01:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:45,482 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 10 treesize of output 8 [2022-12-14 11:01:45,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:01:45,854 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 17 treesize of output 19 [2022-12-14 11:01:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 71 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:46,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:01:46,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:01:46,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 11:01:46,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:01:46,257 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 37 treesize of output 32 [2022-12-14 11:01:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 71 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:46,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660073124] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:01:46,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749694556] [2022-12-14 11:01:46,456 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:01:46,456 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:01:46,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:01:46,456 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:01:46,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:01:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:46,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:01:46,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:01:46,529 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:46,559 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:46,594 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:46,631 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:01:46,632 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 24 [2022-12-14 11:01:47,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:01:50,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '136850#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:01:50,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:01:50,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:01:50,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2022-12-14 11:01:50,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388099994] [2022-12-14 11:01:50,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:01:50,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 11:01:50,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:01:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 11:01:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=3580, Unknown=7, NotChecked=0, Total=3782 [2022-12-14 11:01:50,096 INFO L87 Difference]: Start difference. First operand 3336 states and 4190 transitions. Second operand has 48 states, 48 states have (on average 3.375) internal successors, (162), 47 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:51,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:51,725 INFO L93 Difference]: Finished difference Result 6371 states and 7967 transitions. [2022-12-14 11:01:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 11:01:51,726 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.375) internal successors, (162), 47 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-12-14 11:01:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:01:51,728 INFO L225 Difference]: With dead ends: 6371 [2022-12-14 11:01:51,728 INFO L226 Difference]: Without dead ends: 3339 [2022-12-14 11:01:51,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 304 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=443, Invalid=6860, Unknown=7, NotChecked=0, Total=7310 [2022-12-14 11:01:51,728 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 490 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 2702 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 2714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:01:51,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1524 Invalid, 2714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2702 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 11:01:51,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-12-14 11:01:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3338. [2022-12-14 11:01:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.2562181600239737) internal successors, (4192), 3337 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4192 transitions. [2022-12-14 11:01:51,749 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4192 transitions. Word has length 114 [2022-12-14 11:01:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:51,749 INFO L495 AbstractCegarLoop]: Abstraction has 3338 states and 4192 transitions. [2022-12-14 11:01:51,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.375) internal successors, (162), 47 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4192 transitions. [2022-12-14 11:01:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 11:01:51,751 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:51,751 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:51,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 11:01:51,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:51,952 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:01:51,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:51,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1727239946, now seen corresponding path program 18 times [2022-12-14 11:01:51,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:01:51,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586380480] [2022-12-14 11:01:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:51,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:01:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 81 proven. 491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:52,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:01:52,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586380480] [2022-12-14 11:01:52,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586380480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:01:52,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107254482] [2022-12-14 11:01:52,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:01:52,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:52,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:52,595 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:52,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 11:01:52,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:01:52,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:01:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 11:01:52,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 100 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:53,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:01:53,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:01:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 100 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:53,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107254482] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:01:53,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501041288] [2022-12-14 11:01:53,946 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:01:53,946 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:01:53,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:01:53,946 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:01:53,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:01:53,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:53,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:01:53,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:01:54,018 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:54,044 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:54,068 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:01:54,094 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:01:54,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 11:01:54,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:01:57,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '147367#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:01:57,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:01:57,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:01:57,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 54 [2022-12-14 11:01:57,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941362067] [2022-12-14 11:01:57,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:01:57,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 11:01:57,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:01:57,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 11:01:57,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=4368, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 11:01:57,677 INFO L87 Difference]: Start difference. First operand 3338 states and 4192 transitions. Second operand has 56 states, 55 states have (on average 4.4) internal successors, (242), 55 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:58,465 INFO L93 Difference]: Finished difference Result 3919 states and 4923 transitions. [2022-12-14 11:01:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 11:01:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 4.4) internal successors, (242), 55 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-12-14 11:01:58,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:01:58,468 INFO L225 Difference]: With dead ends: 3919 [2022-12-14 11:01:58,468 INFO L226 Difference]: Without dead ends: 3919 [2022-12-14 11:01:58,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 291 SyntacticMatches, 12 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1012, Invalid=6128, Unknown=0, NotChecked=0, Total=7140 [2022-12-14 11:01:58,469 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 1241 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:01:58,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 852 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:01:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2022-12-14 11:01:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3638. [2022-12-14 11:01:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 1.2557052515809732) internal successors, (4567), 3637 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 4567 transitions. [2022-12-14 11:01:58,504 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 4567 transitions. Word has length 116 [2022-12-14 11:01:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:58,504 INFO L495 AbstractCegarLoop]: Abstraction has 3638 states and 4567 transitions. [2022-12-14 11:01:58,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 4.4) internal successors, (242), 55 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 4567 transitions. [2022-12-14 11:01:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 11:01:58,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:58,509 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:58,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 11:01:58,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:58,710 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:01:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1852751985, now seen corresponding path program 19 times [2022-12-14 11:01:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:01:58,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21425374] [2022-12-14 11:01:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:58,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:01:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 78 proven. 583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:01:59,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:01:59,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21425374] [2022-12-14 11:01:59,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21425374] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:01:59,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68766505] [2022-12-14 11:01:59,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:01:59,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:59,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:59,707 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:59,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 11:01:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:59,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 11:01:59,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:59,876 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 10 treesize of output 8 [2022-12-14 11:02:00,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:02:00,307 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 17 treesize of output 19 [2022-12-14 11:02:00,526 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 15 treesize of output 7 [2022-12-14 11:02:00,528 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 78 proven. 583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:00,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:02:00,668 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1844 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1844) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 11 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-12-14 11:02:00,671 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:02:00,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 11:02:00,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:02:00,676 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 37 treesize of output 32 [2022-12-14 11:02:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 78 proven. 583 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:00,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68766505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:02:00,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [667642662] [2022-12-14 11:02:00,906 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:02:00,906 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:02:00,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:02:00,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:02:00,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:02:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:02:00,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:02:00,955 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:00,984 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 14 treesize of output 10 [2022-12-14 11:02:01,002 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:01,035 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:01,083 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:02:01,083 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 24 [2022-12-14 11:02:01,340 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:02:04,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '155756#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:02:04,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:02:04,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:02:04,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2022-12-14 11:02:04,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704985683] [2022-12-14 11:02:04,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:02:04,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 11:02:04,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:02:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 11:02:04,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3595, Unknown=1, NotChecked=120, Total=3906 [2022-12-14 11:02:04,752 INFO L87 Difference]: Start difference. First operand 3638 states and 4567 transitions. Second operand has 50 states, 50 states have (on average 3.44) internal successors, (172), 49 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:02:06,700 INFO L93 Difference]: Finished difference Result 6973 states and 8719 transitions. [2022-12-14 11:02:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 11:02:06,700 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.44) internal successors, (172), 49 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-12-14 11:02:06,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:02:06,702 INFO L225 Difference]: With dead ends: 6973 [2022-12-14 11:02:06,702 INFO L226 Difference]: Without dead ends: 3641 [2022-12-14 11:02:06,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 323 SyntacticMatches, 15 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=442, Invalid=7217, Unknown=1, NotChecked=172, Total=7832 [2022-12-14 11:02:06,703 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 667 mSDsluCounter, 1778 mSDsCounter, 0 mSdLazyCounter, 3185 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 3340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:02:06,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1835 Invalid, 3340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3185 Invalid, 0 Unknown, 142 Unchecked, 1.1s Time] [2022-12-14 11:02:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2022-12-14 11:02:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 3640. [2022-12-14 11:02:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 1.2555647155812035) internal successors, (4569), 3639 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 4569 transitions. [2022-12-14 11:02:06,731 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 4569 transitions. Word has length 124 [2022-12-14 11:02:06,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:02:06,732 INFO L495 AbstractCegarLoop]: Abstraction has 3640 states and 4569 transitions. [2022-12-14 11:02:06,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.44) internal successors, (172), 49 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 4569 transitions. [2022-12-14 11:02:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 11:02:06,735 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:02:06,735 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 11:02:06,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 11:02:06,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-14 11:02:06,936 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:02:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:02:06,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2034843653, now seen corresponding path program 20 times [2022-12-14 11:02:06,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:02:06,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493284695] [2022-12-14 11:02:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:06,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:02:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 100 proven. 584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:07,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:02:07,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493284695] [2022-12-14 11:02:07,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493284695] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:02:07,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504614757] [2022-12-14 11:02:07,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:02:07,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:02:07,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:02:07,605 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:02:07,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 11:02:08,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-14 11:02:08,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:02:08,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 11:02:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:02:08,141 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:02:08,141 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 11:02:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 121 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:08,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:02:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 121 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:10,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504614757] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:02:10,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1472897329] [2022-12-14 11:02:10,081 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:02:10,081 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:02:10,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:02:10,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:02:10,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:02:10,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:02:10,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:02:10,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:02:10,154 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:10,176 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:10,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:02:10,250 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:02:10,250 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 24 [2022-12-14 11:02:10,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:02:14,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '167269#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:02:14,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:02:14,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:02:14,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 83 [2022-12-14 11:02:14,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689142360] [2022-12-14 11:02:14,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:02:14,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-12-14 11:02:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:02:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-12-14 11:02:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1107, Invalid=8399, Unknown=0, NotChecked=0, Total=9506 [2022-12-14 11:02:14,901 INFO L87 Difference]: Start difference. First operand 3640 states and 4569 transitions. Second operand has 85 states, 84 states have (on average 4.5) internal successors, (378), 84 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:15,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:02:15,722 INFO L93 Difference]: Finished difference Result 4221 states and 5300 transitions. [2022-12-14 11:02:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 11:02:15,723 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 4.5) internal successors, (378), 84 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2022-12-14 11:02:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:02:15,725 INFO L225 Difference]: With dead ends: 4221 [2022-12-14 11:02:15,725 INFO L226 Difference]: Without dead ends: 4221 [2022-12-14 11:02:15,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 295 SyntacticMatches, 12 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5644 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2053, Invalid=10829, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 11:02:15,726 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 1978 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1978 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:02:15,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1978 Valid, 788 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:02:15,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2022-12-14 11:02:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 3940. [2022-12-14 11:02:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 3939 states have (on average 1.2551408987052552) internal successors, (4944), 3939 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 4944 transitions. [2022-12-14 11:02:15,751 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 4944 transitions. Word has length 126 [2022-12-14 11:02:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:02:15,751 INFO L495 AbstractCegarLoop]: Abstraction has 3940 states and 4944 transitions. [2022-12-14 11:02:15,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 4.5) internal successors, (378), 84 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 4944 transitions. [2022-12-14 11:02:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 11:02:15,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:02:15,754 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2022-12-14 11:02:15,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 11:02:15,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-14 11:02:15,954 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:02:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:02:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1626761314, now seen corresponding path program 21 times [2022-12-14 11:02:15,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:02:15,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183020655] [2022-12-14 11:02:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:15,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:02:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 85 proven. 696 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:17,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:02:17,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183020655] [2022-12-14 11:02:17,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183020655] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:02:17,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071462507] [2022-12-14 11:02:17,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:02:17,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:02:17,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:02:17,170 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:02:17,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 11:02:17,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:02:17,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:02:17,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-14 11:02:17,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:02:17,550 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 10 treesize of output 8 [2022-12-14 11:02:17,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:02:17,972 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 17 treesize of output 19 [2022-12-14 11:02:18,305 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 11:02:18,305 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 29 treesize of output 13 [2022-12-14 11:02:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 13 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:18,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:02:19,416 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcspn_~s~0#1.offset| Int) (v_ArrVal_1982 (Array Int Int)) (|ULTIMATE.start_cstrcspn_~s~0#1.base| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1982))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|))) (or (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (not (= .cse0 0)))))) is different from false [2022-12-14 11:02:19,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:02:19,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-12-14 11:02:19,446 INFO L321 Elim1Store]: treesize reduction 4, result has 89.2 percent of original size [2022-12-14 11:02:19,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 110 [2022-12-14 11:02:19,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:02:19,454 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 74 treesize of output 70 [2022-12-14 11:02:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 13 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:19,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071462507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:02:19,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479479941] [2022-12-14 11:02:19,661 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:02:19,661 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:02:19,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:02:19,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:02:19,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:02:19,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:02:19,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:02:19,698 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:19,733 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:19,758 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:19,810 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:19,843 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:02:19,844 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 24 [2022-12-14 11:02:20,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:02:25,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '176346#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:02:25,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:02:25,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:02:25,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 34] total 72 [2022-12-14 11:02:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874571179] [2022-12-14 11:02:25,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:02:25,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 11:02:25,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:02:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 11:02:25,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=6884, Unknown=1, NotChecked=166, Total=7310 [2022-12-14 11:02:25,136 INFO L87 Difference]: Start difference. First operand 3940 states and 4944 transitions. Second operand has 73 states, 73 states have (on average 3.9452054794520546) internal successors, (288), 72 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:02:31,219 INFO L93 Difference]: Finished difference Result 7575 states and 9471 transitions. [2022-12-14 11:02:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-12-14 11:02:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.9452054794520546) internal successors, (288), 72 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-12-14 11:02:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:02:31,222 INFO L225 Difference]: With dead ends: 7575 [2022-12-14 11:02:31,222 INFO L226 Difference]: Without dead ends: 3943 [2022-12-14 11:02:31,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 331 SyntacticMatches, 16 SemanticMatches, 124 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3309 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=735, Invalid=14768, Unknown=1, NotChecked=246, Total=15750 [2022-12-14 11:02:31,223 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 872 mSDsluCounter, 2689 mSDsCounter, 0 mSdLazyCounter, 4943 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 2751 SdHoareTripleChecker+Invalid, 5091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:02:31,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 2751 Invalid, 5091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4943 Invalid, 0 Unknown, 132 Unchecked, 2.0s Time] [2022-12-14 11:02:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2022-12-14 11:02:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3942. [2022-12-14 11:02:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 1.2550114184217205) internal successors, (4946), 3941 states have internal predecessors, (4946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 4946 transitions. [2022-12-14 11:02:31,263 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 4946 transitions. Word has length 134 [2022-12-14 11:02:31,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:02:31,263 INFO L495 AbstractCegarLoop]: Abstraction has 3942 states and 4946 transitions. [2022-12-14 11:02:31,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.9452054794520546) internal successors, (288), 72 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 4946 transitions. [2022-12-14 11:02:31,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 11:02:31,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:02:31,265 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2022-12-14 11:02:31,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-14 11:02:31,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:02:31,466 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:02:31,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:02:31,467 INFO L85 PathProgramCache]: Analyzing trace with hash -500433772, now seen corresponding path program 22 times [2022-12-14 11:02:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:02:31,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631534517] [2022-12-14 11:02:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:31,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:02:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 121 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:32,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:02:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631534517] [2022-12-14 11:02:32,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631534517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:02:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038297371] [2022-12-14 11:02:32,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:02:32,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:02:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:02:32,382 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:02:32,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 11:02:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:32,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-14 11:02:32,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:02:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 144 proven. 662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:33,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:02:33,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:02:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 144 proven. 662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:34,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038297371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:02:34,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991497858] [2022-12-14 11:02:34,311 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:02:34,311 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:02:34,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:02:34,311 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:02:34,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:02:34,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:02:34,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:02:34,359 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 11 treesize of output 7 [2022-12-14 11:02:34,394 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:34,424 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:34,459 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:34,494 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:02:34,494 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 24 [2022-12-14 11:02:34,970 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:02:38,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '188830#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:02:38,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:02:38,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:02:38,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 62 [2022-12-14 11:02:38,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776350994] [2022-12-14 11:02:38,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:02:38,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 11:02:38,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:02:38,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 11:02:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=5430, Unknown=0, NotChecked=0, Total=6006 [2022-12-14 11:02:38,048 INFO L87 Difference]: Start difference. First operand 3942 states and 4946 transitions. Second operand has 64 states, 63 states have (on average 4.476190476190476) internal successors, (282), 63 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:39,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:02:39,337 INFO L93 Difference]: Finished difference Result 4523 states and 5677 transitions. [2022-12-14 11:02:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 11:02:39,337 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 4.476190476190476) internal successors, (282), 63 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-12-14 11:02:39,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:02:39,340 INFO L225 Difference]: With dead ends: 4523 [2022-12-14 11:02:39,340 INFO L226 Difference]: Without dead ends: 4523 [2022-12-14 11:02:39,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 345 SyntacticMatches, 14 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3244 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1285, Invalid=7645, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 11:02:39,341 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 2163 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2163 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:02:39,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2163 Valid, 1143 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:02:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2022-12-14 11:02:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 4242. [2022-12-14 11:02:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4242 states, 4241 states have (on average 1.254656920537609) internal successors, (5321), 4241 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4242 states to 4242 states and 5321 transitions. [2022-12-14 11:02:39,367 INFO L78 Accepts]: Start accepts. Automaton has 4242 states and 5321 transitions. Word has length 136 [2022-12-14 11:02:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:02:39,367 INFO L495 AbstractCegarLoop]: Abstraction has 4242 states and 5321 transitions. [2022-12-14 11:02:39,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 4.476190476190476) internal successors, (282), 63 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4242 states and 5321 transitions. [2022-12-14 11:02:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 11:02:39,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:02:39,370 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2022-12-14 11:02:39,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 11:02:39,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-14 11:02:39,571 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:02:39,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:02:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash 430593325, now seen corresponding path program 23 times [2022-12-14 11:02:39,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:02:39,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498923832] [2022-12-14 11:02:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:02:39,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:02:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:02:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 92 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:41,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:02:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498923832] [2022-12-14 11:02:41,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498923832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:02:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204444111] [2022-12-14 11:02:41,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:02:41,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:02:41,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:02:41,338 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:02:41,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 11:02:42,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-14 11:02:42,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:02:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 109 conjunts are in the unsatisfiable core [2022-12-14 11:02:42,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:02:42,082 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:02:42,082 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 11:02:43,210 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:43,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:02:43,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 11:02:46,213 INFO L321 Elim1Store]: treesize reduction 21, result has 43.2 percent of original size [2022-12-14 11:02:46,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2022-12-14 11:02:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 100 proven. 811 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:46,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:02:49,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:02:49,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 33 [2022-12-14 11:02:49,838 INFO L321 Elim1Store]: treesize reduction 4, result has 89.7 percent of original size [2022-12-14 11:02:49,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 76 [2022-12-14 11:02:49,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:02:49,848 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 30 treesize of output 34 [2022-12-14 11:02:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 128 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:02:52,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204444111] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:02:52,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681880965] [2022-12-14 11:02:52,477 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:02:52,477 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:02:52,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:02:52,477 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:02:52,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:02:52,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:02:52,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:02:52,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:02:52,552 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:52,574 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:52,598 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:02:52,623 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:02:52,623 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 24 [2022-12-14 11:02:53,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:02:58,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '198615#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:02:58,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:02:58,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:02:58,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 39, 37] total 113 [2022-12-14 11:02:58,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108031635] [2022-12-14 11:02:58,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:02:58,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-12-14 11:02:58,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:02:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-12-14 11:02:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=15329, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 11:02:58,156 INFO L87 Difference]: Start difference. First operand 4242 states and 5321 transitions. Second operand has 114 states, 114 states have (on average 3.789473684210526) internal successors, (432), 113 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:03:33,938 WARN L233 SmtUtils]: Spent 32.36s on a formula simplification. DAG size of input: 74 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:04:08,601 WARN L233 SmtUtils]: Spent 32.39s on a formula simplification. DAG size of input: 62 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:04:11,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:04:21,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:04:34,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:03,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:36,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:52,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:06:08,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:06:20,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:07:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:07:02,486 INFO L93 Difference]: Finished difference Result 11153 states and 14066 transitions. [2022-12-14 11:07:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 462 states. [2022-12-14 11:07:02,487 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.789473684210526) internal successors, (432), 113 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-12-14 11:07:02,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:07:02,492 INFO L225 Difference]: With dead ends: 11153 [2022-12-14 11:07:02,492 INFO L226 Difference]: Without dead ends: 7523 [2022-12-14 11:07:02,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 586 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135146 ImplicationChecksByTransitivity, 231.4s TimeCoverageRelationStatistics Valid=52506, Invalid=292645, Unknown=5, NotChecked=0, Total=345156 [2022-12-14 11:07:02,509 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3376 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 8777 mSolverCounterSat, 171 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3376 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 8966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 8777 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:07:02,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3376 Valid, 1791 Invalid, 8966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 8777 Invalid, 18 Unknown, 0 Unchecked, 24.9s Time] [2022-12-14 11:07:02,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7523 states. [2022-12-14 11:07:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7523 to 4362. [2022-12-14 11:07:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4362 states, 4361 states have (on average 1.2504012841091492) internal successors, (5453), 4361 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4362 states to 4362 states and 5453 transitions. [2022-12-14 11:07:02,556 INFO L78 Accepts]: Start accepts. Automaton has 4362 states and 5453 transitions. Word has length 144 [2022-12-14 11:07:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:07:02,556 INFO L495 AbstractCegarLoop]: Abstraction has 4362 states and 5453 transitions. [2022-12-14 11:07:02,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.789473684210526) internal successors, (432), 113 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4362 states and 5453 transitions. [2022-12-14 11:07:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 11:07:02,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:07:02,561 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:07:02,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 11:07:02,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-14 11:07:02,762 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:07:02,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:07:02,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2043172322, now seen corresponding path program 2 times [2022-12-14 11:07:02,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:07:02,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55909289] [2022-12-14 11:07:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:07:02,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:07:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:07:03,039 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 79 proven. 99 refuted. 0 times theorem prover too weak. 761 trivial. 0 not checked. [2022-12-14 11:07:03,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:07:03,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55909289] [2022-12-14 11:07:03,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55909289] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:07:03,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114028003] [2022-12-14 11:07:03,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:07:03,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:03,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:07:03,040 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:07:03,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 11:07:03,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 11:07:03,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:07:03,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 11:07:03,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:07:03,295 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 151 proven. 39 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2022-12-14 11:07:03,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:07:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 187 proven. 3 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2022-12-14 11:07:03,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114028003] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:07:03,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131600884] [2022-12-14 11:07:03,560 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 11:07:03,560 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:07:03,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:07:03,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:07:03,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:07:03,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:03,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:07:03,607 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:03,631 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 14 treesize of output 10 [2022-12-14 11:07:03,650 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:03,687 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:03,716 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:03,744 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:03,773 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:03,811 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:07:03,811 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 24 [2022-12-14 11:07:04,078 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:07:06,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '215968#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:07:06,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:07:06,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:07:06,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-12-14 11:07:06,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768826760] [2022-12-14 11:07:06,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:07:06,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:07:06,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:07:06,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:07:06,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2022-12-14 11:07:06,345 INFO L87 Difference]: Start difference. First operand 4362 states and 5453 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:06,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:07:06,540 INFO L93 Difference]: Finished difference Result 4888 states and 5882 transitions. [2022-12-14 11:07:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:07:06,541 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2022-12-14 11:07:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:07:06,543 INFO L225 Difference]: With dead ends: 4888 [2022-12-14 11:07:06,543 INFO L226 Difference]: Without dead ends: 4888 [2022-12-14 11:07:06,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 415 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=253, Invalid=1079, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:07:06,544 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 84 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:07:06,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 39 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:07:06,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4888 states. [2022-12-14 11:07:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4888 to 3382. [2022-12-14 11:07:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 3381 states have (on average 1.2854185152321798) internal successors, (4346), 3381 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 4346 transitions. [2022-12-14 11:07:06,567 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 4346 transitions. Word has length 149 [2022-12-14 11:07:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:07:06,567 INFO L495 AbstractCegarLoop]: Abstraction has 3382 states and 4346 transitions. [2022-12-14 11:07:06,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 16 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 4346 transitions. [2022-12-14 11:07:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 11:07:06,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:07:06,569 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 11:07:06,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-14 11:07:06,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:06,771 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:07:06,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:07:06,772 INFO L85 PathProgramCache]: Analyzing trace with hash 186526979, now seen corresponding path program 3 times [2022-12-14 11:07:06,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:07:06,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026835501] [2022-12-14 11:07:06,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:07:06,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:07:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:07:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 144 proven. 794 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:07:07,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:07:07,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026835501] [2022-12-14 11:07:07,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026835501] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:07:07,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583475025] [2022-12-14 11:07:07,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:07:07,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:07,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:07:07,797 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:07:07,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 11:07:08,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:07:08,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:07:08,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 11:07:08,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:07:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 169 proven. 769 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:07:09,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:07:10,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:07:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 169 proven. 769 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:07:10,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583475025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:07:10,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442379821] [2022-12-14 11:07:10,318 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 11:07:10,318 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:07:10,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:07:10,318 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:07:10,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:07:10,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:10,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:07:10,359 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 14 treesize of output 10 [2022-12-14 11:07:10,383 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:10,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:07:10,435 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:10,461 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:10,490 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:10,523 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:10,563 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:07:10,563 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 24 [2022-12-14 11:07:10,770 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:07:14,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '225232#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.offset|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:07:14,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:07:14,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:07:14,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 66 [2022-12-14 11:07:14,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267040870] [2022-12-14 11:07:14,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:07:14,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 11:07:14,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:07:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 11:07:14,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=645, Invalid=5997, Unknown=0, NotChecked=0, Total=6642 [2022-12-14 11:07:14,462 INFO L87 Difference]: Start difference. First operand 3382 states and 4346 transitions. Second operand has 68 states, 67 states have (on average 4.567164179104478) internal successors, (306), 67 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:07:16,123 INFO L93 Difference]: Finished difference Result 7084 states and 9112 transitions. [2022-12-14 11:07:16,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 11:07:16,123 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.567164179104478) internal successors, (306), 67 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-12-14 11:07:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:07:16,127 INFO L225 Difference]: With dead ends: 7084 [2022-12-14 11:07:16,127 INFO L226 Difference]: Without dead ends: 7084 [2022-12-14 11:07:16,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 370 SyntacticMatches, 29 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4647 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1487, Invalid=8613, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 11:07:16,128 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 974 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 3138 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:07:16,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 1691 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3138 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 11:07:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7084 states. [2022-12-14 11:07:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7084 to 3708. [2022-12-14 11:07:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 1.281629349878608) internal successors, (4751), 3707 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 4751 transitions. [2022-12-14 11:07:16,160 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 4751 transitions. Word has length 150 [2022-12-14 11:07:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:07:16,160 INFO L495 AbstractCegarLoop]: Abstraction has 3708 states and 4751 transitions. [2022-12-14 11:07:16,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.567164179104478) internal successors, (306), 67 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 4751 transitions. [2022-12-14 11:07:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 11:07:16,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:07:16,162 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:07:16,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 11:07:16,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-12-14 11:07:16,363 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:07:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:07:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash -790575764, now seen corresponding path program 4 times [2022-12-14 11:07:16,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:07:16,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294992809] [2022-12-14 11:07:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:07:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:07:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:07:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 99 proven. 952 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:07:17,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:07:17,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294992809] [2022-12-14 11:07:17,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294992809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:07:17,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380555778] [2022-12-14 11:07:17,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:07:17,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:17,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:07:17,930 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:07:17,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 11:07:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:07:18,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 117 conjunts are in the unsatisfiable core [2022-12-14 11:07:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:07:18,112 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 10 treesize of output 8 [2022-12-14 11:07:18,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:07:18,836 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 17 treesize of output 19 [2022-12-14 11:07:19,085 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 15 treesize of output 7 [2022-12-14 11:07:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 99 proven. 952 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:07:19,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:07:19,268 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2372 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2372) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 14 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-12-14 11:07:19,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:07:19,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 11:07:19,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:07:19,278 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 37 treesize of output 32 [2022-12-14 11:07:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 99 proven. 952 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:07:19,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380555778] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:07:19,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473259663] [2022-12-14 11:07:19,526 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 11:07:19,526 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:07:19,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:07:19,527 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:07:19,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:07:19,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:19,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:07:19,572 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:19,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:07:19,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:07:19,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:07:19,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:07:19,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:07:19,746 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:07:19,747 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 24 [2022-12-14 11:07:20,010 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:07:23,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '237065#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:07:23,567 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:07:23,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:07:23,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 58 [2022-12-14 11:07:23,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152435335] [2022-12-14 11:07:23,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:07:23,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 11:07:23,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:07:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 11:07:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=4892, Unknown=1, NotChecked=140, Total=5256 [2022-12-14 11:07:23,569 INFO L87 Difference]: Start difference. First operand 3708 states and 4751 transitions. Second operand has 59 states, 59 states have (on average 3.593220338983051) internal successors, (212), 58 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:27,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:07:27,324 INFO L93 Difference]: Finished difference Result 10010 states and 12905 transitions. [2022-12-14 11:07:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 11:07:27,325 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.593220338983051) internal successors, (212), 58 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-12-14 11:07:27,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:07:27,328 INFO L225 Difference]: With dead ends: 10010 [2022-12-14 11:07:27,328 INFO L226 Difference]: Without dead ends: 6650 [2022-12-14 11:07:27,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 427 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=529, Invalid=10186, Unknown=1, NotChecked=204, Total=10920 [2022-12-14 11:07:27,329 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 858 mSDsluCounter, 3199 mSDsCounter, 0 mSdLazyCounter, 5472 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 5705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 5472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:07:27,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 3280 Invalid, 5705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 5472 Invalid, 0 Unknown, 218 Unchecked, 2.2s Time] [2022-12-14 11:07:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6650 states. [2022-12-14 11:07:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6650 to 3710. [2022-12-14 11:07:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 3709 states have (on average 1.2814774871933137) internal successors, (4753), 3709 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 4753 transitions. [2022-12-14 11:07:27,361 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 4753 transitions. Word has length 156 [2022-12-14 11:07:27,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:07:27,361 INFO L495 AbstractCegarLoop]: Abstraction has 3710 states and 4753 transitions. [2022-12-14 11:07:27,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.593220338983051) internal successors, (212), 58 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:27,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 4753 transitions. [2022-12-14 11:07:27,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 11:07:27,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:07:27,363 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:07:27,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-14 11:07:27,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:27,564 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:07:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:07:27,565 INFO L85 PathProgramCache]: Analyzing trace with hash -636916254, now seen corresponding path program 5 times [2022-12-14 11:07:27,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:07:27,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628588930] [2022-12-14 11:07:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:07:27,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:07:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:07:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 169 proven. 911 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:07:28,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:07:28,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628588930] [2022-12-14 11:07:28,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628588930] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:07:28,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593809558] [2022-12-14 11:07:28,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:07:28,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:28,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:07:28,651 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:07:28,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 11:07:29,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-14 11:07:29,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:07:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-14 11:07:29,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:07:29,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:29,409 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 9 treesize of output 11 [2022-12-14 11:07:29,411 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 10 treesize of output 8 [2022-12-14 11:07:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 196 proven. 884 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:07:30,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:07:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 196 proven. 884 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:07:32,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593809558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:07:32,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785353943] [2022-12-14 11:07:32,520 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 11:07:32,520 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:07:32,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:07:32,521 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:07:32,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:07:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:32,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:07:32,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:07:32,595 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:32,617 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:32,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:07:32,684 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 11:07:32,684 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 84 treesize of output 83 [2022-12-14 11:07:32,725 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:32,739 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:32,768 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:07:32,768 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 24 [2022-12-14 11:07:33,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:07:37,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '251908#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:07:37,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:07:37,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:07:37,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 101 [2022-12-14 11:07:37,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803818171] [2022-12-14 11:07:37,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:07:37,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-12-14 11:07:37,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:07:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-12-14 11:07:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1622, Invalid=12184, Unknown=0, NotChecked=0, Total=13806 [2022-12-14 11:07:37,302 INFO L87 Difference]: Start difference. First operand 3710 states and 4753 transitions. Second operand has 103 states, 102 states have (on average 4.647058823529412) internal successors, (474), 102 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:07:39,032 INFO L93 Difference]: Finished difference Result 7203 states and 9297 transitions. [2022-12-14 11:07:39,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 11:07:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 4.647058823529412) internal successors, (474), 102 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-12-14 11:07:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:07:39,037 INFO L225 Difference]: With dead ends: 7203 [2022-12-14 11:07:39,037 INFO L226 Difference]: Without dead ends: 7203 [2022-12-14 11:07:39,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6575 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=3037, Invalid=15869, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 11:07:39,038 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1442 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:07:39,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 1238 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 11:07:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7203 states. [2022-12-14 11:07:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7203 to 3930. [2022-12-14 11:07:39,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3930 states, 3929 states have (on average 1.2825146347671164) internal successors, (5039), 3929 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 5039 transitions. [2022-12-14 11:07:39,074 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 5039 transitions. Word has length 158 [2022-12-14 11:07:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:07:39,074 INFO L495 AbstractCegarLoop]: Abstraction has 3930 states and 5039 transitions. [2022-12-14 11:07:39,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 4.647058823529412) internal successors, (474), 102 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 5039 transitions. [2022-12-14 11:07:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-14 11:07:39,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:07:39,077 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:07:39,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 11:07:39,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:39,278 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:07:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:07:39,279 INFO L85 PathProgramCache]: Analyzing trace with hash -600648513, now seen corresponding path program 1 times [2022-12-14 11:07:39,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:07:39,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38792463] [2022-12-14 11:07:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:07:39,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:07:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:07:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 105 proven. 897 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:07:41,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:07:41,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38792463] [2022-12-14 11:07:41,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38792463] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:07:41,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016970215] [2022-12-14 11:07:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:07:41,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:41,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:07:41,358 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:07:41,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 11:07:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:07:41,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-14 11:07:41,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:07:42,286 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:42,378 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:07:42,378 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 24 [2022-12-14 11:07:42,714 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 15 treesize of output 7 [2022-12-14 11:07:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 105 proven. 897 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:07:42,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:07:43,082 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 44 treesize of output 38 [2022-12-14 11:07:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 105 proven. 897 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:07:43,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016970215] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:07:43,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [626685850] [2022-12-14 11:07:43,343 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 11:07:43,343 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:07:43,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:07:43,343 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:07:43,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:07:43,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:43,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:07:43,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:07:43,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:07:43,456 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:43,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:07:43,535 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 11:07:43,535 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 84 treesize of output 83 [2022-12-14 11:07:43,573 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:43,588 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:07:43,620 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:07:43,621 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 24 [2022-12-14 11:07:44,137 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:07:49,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '264109#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0)) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) (ite (<= (mod |ULTIMATE.start_cstrcspn_~c~0#1| 256) 127) (mod |ULTIMATE.start_cstrcspn_~c~0#1| 256) (+ (- 256) (mod |ULTIMATE.start_cstrcspn_~c~0#1| 256)))) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:07:49,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:07:49,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:07:49,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 58 [2022-12-14 11:07:49,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201139698] [2022-12-14 11:07:49,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:07:49,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-14 11:07:49,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:07:49,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-14 11:07:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5335, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 11:07:49,413 INFO L87 Difference]: Start difference. First operand 3930 states and 5039 transitions. Second operand has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:54,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:07:54,487 INFO L93 Difference]: Finished difference Result 6645 states and 8589 transitions. [2022-12-14 11:07:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-14 11:07:54,488 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-12-14 11:07:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:07:54,490 INFO L225 Difference]: With dead ends: 6645 [2022-12-14 11:07:54,490 INFO L226 Difference]: Without dead ends: 3730 [2022-12-14 11:07:54,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 438 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=605, Invalid=13201, Unknown=0, NotChecked=0, Total=13806 [2022-12-14 11:07:54,490 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1080 mSDsluCounter, 3006 mSDsCounter, 0 mSdLazyCounter, 5422 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 3074 SdHoareTripleChecker+Invalid, 5439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:07:54,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 3074 Invalid, 5439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5422 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 11:07:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2022-12-14 11:07:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3730. [2022-12-14 11:07:54,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 3729 states have (on average 1.2912308930008045) internal successors, (4815), 3729 states have internal predecessors, (4815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 4815 transitions. [2022-12-14 11:07:54,512 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 4815 transitions. Word has length 160 [2022-12-14 11:07:54,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:07:54,512 INFO L495 AbstractCegarLoop]: Abstraction has 3730 states and 4815 transitions. [2022-12-14 11:07:54,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.6610169491525424) internal successors, (216), 58 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:07:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 4815 transitions. [2022-12-14 11:07:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 11:07:54,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:07:54,514 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2022-12-14 11:07:54,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-14 11:07:54,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:54,716 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:07:54,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:07:54,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1429700405, now seen corresponding path program 24 times [2022-12-14 11:07:54,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:07:54,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572540772] [2022-12-14 11:07:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:07:54,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:07:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:07:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 106 proven. 1095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:07:56,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:07:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572540772] [2022-12-14 11:07:56,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572540772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:07:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827089990] [2022-12-14 11:07:56,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:07:56,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:07:56,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:07:56,488 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:07:56,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-14 11:07:56,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:07:56,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:07:56,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 129 conjunts are in the unsatisfiable core [2022-12-14 11:07:56,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:07:56,968 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 10 treesize of output 8 [2022-12-14 11:07:57,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:07:57,948 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 17 treesize of output 19 [2022-12-14 11:07:58,493 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 11:07:58,493 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 29 treesize of output 13 [2022-12-14 11:07:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 16 proven. 1185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:07:58,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:00,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:08:00,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-12-14 11:08:00,935 INFO L321 Elim1Store]: treesize reduction 4, result has 89.2 percent of original size [2022-12-14 11:08:00,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 110 [2022-12-14 11:08:00,945 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:08:00,946 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 74 treesize of output 70 [2022-12-14 11:08:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 16 proven. 1185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:01,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827089990] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:01,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154341989] [2022-12-14 11:08:01,344 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:08:01,344 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:08:01,344 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:08:01,344 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:08:01,344 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:08:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:08:01,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:08:01,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:08:01,431 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:08:01,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:08:01,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:08:01,524 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:08:01,524 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 24 [2022-12-14 11:08:01,790 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:08:09,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '275649#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:08:09,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:08:09,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:08:09,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 40, 40] total 84 [2022-12-14 11:08:09,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136567384] [2022-12-14 11:08:09,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:08:09,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-12-14 11:08:09,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:08:09,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-12-14 11:08:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=9155, Unknown=60, NotChecked=0, Total=9506 [2022-12-14 11:08:09,007 INFO L87 Difference]: Start difference. First operand 3730 states and 4815 transitions. Second operand has 85 states, 85 states have (on average 4.094117647058823) internal successors, (348), 84 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:16,097 INFO L93 Difference]: Finished difference Result 7212 states and 9297 transitions. [2022-12-14 11:08:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 11:08:16,097 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 4.094117647058823) internal successors, (348), 84 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2022-12-14 11:08:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:16,100 INFO L225 Difference]: With dead ends: 7212 [2022-12-14 11:08:16,100 INFO L226 Difference]: Without dead ends: 3733 [2022-12-14 11:08:16,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 412 SyntacticMatches, 19 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4488 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=905, Invalid=20497, Unknown=60, NotChecked=0, Total=21462 [2022-12-14 11:08:16,101 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 737 mSDsluCounter, 4385 mSDsCounter, 0 mSdLazyCounter, 7950 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 4462 SdHoareTripleChecker+Invalid, 7968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 7950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:16,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 4462 Invalid, 7968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 7950 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 11:08:16,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2022-12-14 11:08:16,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3732. [2022-12-14 11:08:16,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 3731 states have (on average 1.2910747788796568) internal successors, (4817), 3731 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 4817 transitions. [2022-12-14 11:08:16,123 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 4817 transitions. Word has length 164 [2022-12-14 11:08:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:16,123 INFO L495 AbstractCegarLoop]: Abstraction has 3732 states and 4817 transitions. [2022-12-14 11:08:16,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 4.094117647058823) internal successors, (348), 84 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:16,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 4817 transitions. [2022-12-14 11:08:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-14 11:08:16,125 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:16,125 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2022-12-14 11:08:16,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-14 11:08:16,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:08:16,326 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:08:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1280594753, now seen corresponding path program 25 times [2022-12-14 11:08:16,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:08:16,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936365480] [2022-12-14 11:08:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:16,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:08:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 196 proven. 1036 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:17,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:08:17,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936365480] [2022-12-14 11:08:17,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936365480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:08:17,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307429122] [2022-12-14 11:08:17,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:08:17,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:08:17,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:08:17,509 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:08:17,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 11:08:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:17,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 11:08:17,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 225 proven. 1007 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:18,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:19,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:08:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 225 proven. 1007 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:19,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307429122] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:19,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2096264943] [2022-12-14 11:08:19,702 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:08:19,702 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:08:19,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:08:19,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:08:19,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:08:19,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:08:19,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:08:19,749 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 14 treesize of output 10 [2022-12-14 11:08:19,785 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:08:19,802 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:08:19,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:08:19,887 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:08:19,887 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 24 [2022-12-14 11:08:20,159 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:08:25,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '287770#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:08:25,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:08:25,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:08:25,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 74 [2022-12-14 11:08:25,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234939729] [2022-12-14 11:08:25,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:08:25,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-14 11:08:25,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:08:25,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-14 11:08:25,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=7062, Unknown=0, NotChecked=0, Total=7832 [2022-12-14 11:08:25,287 INFO L87 Difference]: Start difference. First operand 3732 states and 4817 transitions. Second operand has 76 states, 75 states have (on average 4.56) internal successors, (342), 75 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:27,239 INFO L93 Difference]: Finished difference Result 4178 states and 5395 transitions. [2022-12-14 11:08:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 11:08:27,239 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.56) internal successors, (342), 75 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2022-12-14 11:08:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:27,241 INFO L225 Difference]: With dead ends: 4178 [2022-12-14 11:08:27,241 INFO L226 Difference]: Without dead ends: 4178 [2022-12-14 11:08:27,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 411 SyntacticMatches, 33 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5660 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1755, Invalid=10017, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 11:08:27,242 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1492 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 3139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 3140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:27,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 1699 Invalid, 3140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3139 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:08:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2022-12-14 11:08:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3960. [2022-12-14 11:08:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3959 states have (on average 1.2909825713564032) internal successors, (5111), 3959 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5111 transitions. [2022-12-14 11:08:27,267 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5111 transitions. Word has length 166 [2022-12-14 11:08:27,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:27,267 INFO L495 AbstractCegarLoop]: Abstraction has 3960 states and 5111 transitions. [2022-12-14 11:08:27,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.56) internal successors, (342), 75 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:27,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5111 transitions. [2022-12-14 11:08:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 11:08:27,270 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:27,270 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2022-12-14 11:08:27,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 11:08:27,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-14 11:08:27,471 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:08:27,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:27,472 INFO L85 PathProgramCache]: Analyzing trace with hash 190557914, now seen corresponding path program 26 times [2022-12-14 11:08:27,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:08:27,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520940537] [2022-12-14 11:08:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:27,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:08:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 113 proven. 1248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:29,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:08:29,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520940537] [2022-12-14 11:08:29,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520940537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:08:29,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117383837] [2022-12-14 11:08:29,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:08:29,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:08:29,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:08:29,196 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:08:29,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 11:08:30,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 11:08:30,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:08:30,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 928 conjuncts, 135 conjunts are in the unsatisfiable core [2022-12-14 11:08:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:30,031 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 10 treesize of output 8 [2022-12-14 11:08:30,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:08:30,979 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 17 treesize of output 19 [2022-12-14 11:08:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 113 proven. 1248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:31,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:33,184 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcspn_~s~0#1.offset| Int) (v_ArrVal_2786 (Array Int Int)) (|ULTIMATE.start_cstrcspn_~s~0#1.base| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2786))) (or (= 0 (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (not (= (select (select .cse0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0))))) is different from false [2022-12-14 11:08:33,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:08:33,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2022-12-14 11:08:33,218 INFO L321 Elim1Store]: treesize reduction 4, result has 89.2 percent of original size [2022-12-14 11:08:33,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 76 [2022-12-14 11:08:33,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:08:33,226 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 32 treesize of output 36 [2022-12-14 11:08:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 97 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:33,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117383837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:33,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1514317220] [2022-12-14 11:08:33,534 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:08:33,534 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:08:33,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:08:33,534 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:08:33,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:08:33,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:08:33,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:08:33,587 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:08:33,614 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:08:33,634 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:08:33,664 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:08:33,706 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:08:33,707 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 24 [2022-12-14 11:08:33,968 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:08:40,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '297084#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:08:40,857 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:08:40,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:08:40,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 41] total 84 [2022-12-14 11:08:40,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083033650] [2022-12-14 11:08:40,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:08:40,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-12-14 11:08:40,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:08:40,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-12-14 11:08:40,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=9012, Unknown=1, NotChecked=190, Total=9506 [2022-12-14 11:08:40,858 INFO L87 Difference]: Start difference. First operand 3960 states and 5111 transitions. Second operand has 85 states, 85 states have (on average 4.223529411764706) internal successors, (359), 84 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:08:49,561 INFO L93 Difference]: Finished difference Result 7670 states and 9887 transitions. [2022-12-14 11:08:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-14 11:08:49,562 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 4.223529411764706) internal successors, (359), 84 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-12-14 11:08:49,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:08:49,564 INFO L225 Difference]: With dead ends: 7670 [2022-12-14 11:08:49,564 INFO L226 Difference]: Without dead ends: 3963 [2022-12-14 11:08:49,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 443 SyntacticMatches, 20 SemanticMatches, 148 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=921, Invalid=21134, Unknown=1, NotChecked=294, Total=22350 [2022-12-14 11:08:49,565 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 979 mSDsluCounter, 3998 mSDsCounter, 0 mSdLazyCounter, 7156 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 4080 SdHoareTripleChecker+Invalid, 7393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 7156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:08:49,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 4080 Invalid, 7393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 7156 Invalid, 0 Unknown, 217 Unchecked, 3.4s Time] [2022-12-14 11:08:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2022-12-14 11:08:49,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3962. [2022-12-14 11:08:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3962 states, 3961 states have (on average 1.2908356475637466) internal successors, (5113), 3961 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3962 states to 3962 states and 5113 transitions. [2022-12-14 11:08:49,588 INFO L78 Accepts]: Start accepts. Automaton has 3962 states and 5113 transitions. Word has length 174 [2022-12-14 11:08:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:08:49,589 INFO L495 AbstractCegarLoop]: Abstraction has 3962 states and 5113 transitions. [2022-12-14 11:08:49,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 4.223529411764706) internal successors, (359), 84 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:08:49,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3962 states and 5113 transitions. [2022-12-14 11:08:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 11:08:49,591 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:08:49,591 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2022-12-14 11:08:49,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-14 11:08:49,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-12-14 11:08:49,792 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:08:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:08:49,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1221368368, now seen corresponding path program 27 times [2022-12-14 11:08:49,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:08:49,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441486567] [2022-12-14 11:08:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:08:49,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:08:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:08:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 225 proven. 1169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:51,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:08:51,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441486567] [2022-12-14 11:08:51,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441486567] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:08:51,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862789189] [2022-12-14 11:08:51,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:08:51,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:08:51,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:08:51,116 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:08:51,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-14 11:08:51,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:08:51,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:08:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-14 11:08:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:08:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 256 proven. 1138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:52,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:08:54,176 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 22 treesize of output 18 [2022-12-14 11:08:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 256 proven. 1138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:08:55,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862789189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:08:55,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171818560] [2022-12-14 11:08:55,225 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:08:55,225 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:08:55,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:08:55,225 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:08:55,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:08:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:08:55,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:08:55,272 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:08:55,302 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:08:55,317 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:08:55,359 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 14 treesize of output 10 [2022-12-14 11:08:55,402 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:08:55,402 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 24 [2022-12-14 11:08:55,692 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:09:01,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '309979#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:09:01,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:09:01,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:09:01,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 94 [2022-12-14 11:09:01,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582224824] [2022-12-14 11:09:01,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:09:01,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-12-14 11:09:01,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:09:01,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-12-14 11:09:01,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1327, Invalid=10445, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 11:09:01,646 INFO L87 Difference]: Start difference. First operand 3962 states and 5113 transitions. Second operand has 96 states, 95 states have (on average 4.2) internal successors, (399), 95 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:03,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:09:03,642 INFO L93 Difference]: Finished difference Result 4408 states and 5691 transitions. [2022-12-14 11:09:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 11:09:03,642 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.2) internal successors, (399), 95 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2022-12-14 11:09:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:09:03,644 INFO L225 Difference]: With dead ends: 4408 [2022-12-14 11:09:03,644 INFO L226 Difference]: Without dead ends: 4408 [2022-12-14 11:09:03,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 439 SyntacticMatches, 17 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6773 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2790, Invalid=13980, Unknown=0, NotChecked=0, Total=16770 [2022-12-14 11:09:03,645 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 2312 mSDsluCounter, 1807 mSDsCounter, 0 mSdLazyCounter, 3396 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2312 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 3397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:09:03,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2312 Valid, 1898 Invalid, 3397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3396 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:09:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2022-12-14 11:09:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 4190. [2022-12-14 11:09:03,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4190 states, 4189 states have (on average 1.290761518262115) internal successors, (5407), 4189 states have internal predecessors, (5407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 5407 transitions. [2022-12-14 11:09:03,671 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 5407 transitions. Word has length 176 [2022-12-14 11:09:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:09:03,672 INFO L495 AbstractCegarLoop]: Abstraction has 4190 states and 5407 transitions. [2022-12-14 11:09:03,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.2) internal successors, (399), 95 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 5407 transitions. [2022-12-14 11:09:03,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-12-14 11:09:03,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:09:03,674 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2022-12-14 11:09:03,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-14 11:09:03,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:09:03,875 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:09:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:09:03,876 INFO L85 PathProgramCache]: Analyzing trace with hash -918371735, now seen corresponding path program 28 times [2022-12-14 11:09:03,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:09:03,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117969593] [2022-12-14 11:09:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:09:03,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:09:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:09:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 120 proven. 1411 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:05,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:09:05,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117969593] [2022-12-14 11:09:05,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117969593] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:09:05,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925576191] [2022-12-14 11:09:05,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:09:05,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:09:05,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:09:05,816 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:09:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 11:09:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:09:06,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 140 conjunts are in the unsatisfiable core [2022-12-14 11:09:06,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:09:06,034 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 10 treesize of output 8 [2022-12-14 11:09:06,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:09:06,375 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 14 treesize of output 16 [2022-12-14 11:09:07,345 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 15 treesize of output 7 [2022-12-14 11:09:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 120 proven. 1411 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:07,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:09:07,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:09:07,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 11:09:07,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:09:07,652 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 37 treesize of output 32 [2022-12-14 11:09:07,655 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 7 treesize of output 3 [2022-12-14 11:09:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 120 proven. 1411 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:08,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925576191] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:09:08,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084550645] [2022-12-14 11:09:08,726 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:09:08,726 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:09:08,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:09:08,726 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:09:08,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:09:08,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:09:08,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:09:08,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:09:08,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:09:08,821 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:09:08,851 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 14 treesize of output 10 [2022-12-14 11:09:08,877 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:09:08,877 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 24 [2022-12-14 11:09:09,334 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:09:13,527 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319813#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:09:13,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:09:13,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:09:13,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 82 [2022-12-14 11:09:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766642916] [2022-12-14 11:09:13,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:09:13,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-14 11:09:13,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:09:13,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-14 11:09:13,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=9014, Unknown=15, NotChecked=0, Total=9312 [2022-12-14 11:09:13,528 INFO L87 Difference]: Start difference. First operand 4190 states and 5407 transitions. Second operand has 83 states, 83 states have (on average 4.385542168674699) internal successors, (364), 82 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:18,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:09:18,668 INFO L93 Difference]: Finished difference Result 8128 states and 10477 transitions. [2022-12-14 11:09:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-14 11:09:18,669 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 4.385542168674699) internal successors, (364), 82 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2022-12-14 11:09:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:09:18,671 INFO L225 Difference]: With dead ends: 8128 [2022-12-14 11:09:18,671 INFO L226 Difference]: Without dead ends: 4193 [2022-12-14 11:09:18,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 494 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3275 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=650, Invalid=17157, Unknown=15, NotChecked=0, Total=17822 [2022-12-14 11:09:18,672 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1233 mSDsluCounter, 4496 mSDsCounter, 0 mSdLazyCounter, 7853 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 4583 SdHoareTripleChecker+Invalid, 7872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 7853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:09:18,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 4583 Invalid, 7872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 7853 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 11:09:18,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2022-12-14 11:09:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 4192. [2022-12-14 11:09:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4192 states, 4191 states have (on average 1.290622763063708) internal successors, (5409), 4191 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4192 states to 4192 states and 5409 transitions. [2022-12-14 11:09:18,696 INFO L78 Accepts]: Start accepts. Automaton has 4192 states and 5409 transitions. Word has length 184 [2022-12-14 11:09:18,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:09:18,696 INFO L495 AbstractCegarLoop]: Abstraction has 4192 states and 5409 transitions. [2022-12-14 11:09:18,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 4.385542168674699) internal successors, (364), 82 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:18,697 INFO L276 IsEmpty]: Start isEmpty. Operand 4192 states and 5409 transitions. [2022-12-14 11:09:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 11:09:18,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:09:18,699 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2022-12-14 11:09:18,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-12-14 11:09:18,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-14 11:09:18,900 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:09:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:09:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2134031839, now seen corresponding path program 29 times [2022-12-14 11:09:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:09:18,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877862277] [2022-12-14 11:09:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:09:18,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:09:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:09:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 256 proven. 1310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:20,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:09:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877862277] [2022-12-14 11:09:20,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877862277] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:09:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486572934] [2022-12-14 11:09:20,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:09:20,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:09:20,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:09:20,347 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:09:20,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 11:09:21,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-12-14 11:09:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:09:21,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-14 11:09:21,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:09:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 289 proven. 1277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:22,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:09:24,151 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 7 treesize of output 5 [2022-12-14 11:09:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 289 proven. 1277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:24,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486572934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:09:24,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114445540] [2022-12-14 11:09:24,685 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:09:24,685 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:09:24,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:09:24,686 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:09:24,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:09:24,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:09:24,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:09:24,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:09:24,771 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:09:24,795 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 14 treesize of output 10 [2022-12-14 11:09:24,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:09:24,851 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:09:24,852 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 24 [2022-12-14 11:09:25,315 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:09:29,174 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '333433#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:09:29,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:09:29,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:09:29,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 100 [2022-12-14 11:09:29,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068480171] [2022-12-14 11:09:29,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:09:29,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-12-14 11:09:29,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:09:29,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-12-14 11:09:29,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1649, Invalid=11691, Unknown=0, NotChecked=0, Total=13340 [2022-12-14 11:09:29,176 INFO L87 Difference]: Start difference. First operand 4192 states and 5409 transitions. Second operand has 102 states, 101 states have (on average 5.138613861386139) internal successors, (519), 101 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:09:31,392 INFO L93 Difference]: Finished difference Result 4638 states and 5987 transitions. [2022-12-14 11:09:31,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 11:09:31,393 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 5.138613861386139) internal successors, (519), 101 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2022-12-14 11:09:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:09:31,396 INFO L225 Difference]: With dead ends: 4638 [2022-12-14 11:09:31,396 INFO L226 Difference]: Without dead ends: 4638 [2022-12-14 11:09:31,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 462 SyntacticMatches, 19 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7642 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3065, Invalid=15841, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 11:09:31,397 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1573 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 3069 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:09:31,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1573 Valid, 1656 Invalid, 3070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3069 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 11:09:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4638 states. [2022-12-14 11:09:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4638 to 4420. [2022-12-14 11:09:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4420 states, 4419 states have (on average 1.2905634758995248) internal successors, (5703), 4419 states have internal predecessors, (5703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 5703 transitions. [2022-12-14 11:09:31,424 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 5703 transitions. Word has length 186 [2022-12-14 11:09:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:09:31,424 INFO L495 AbstractCegarLoop]: Abstraction has 4420 states and 5703 transitions. [2022-12-14 11:09:31,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 5.138613861386139) internal successors, (519), 101 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 5703 transitions. [2022-12-14 11:09:31,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-14 11:09:31,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:09:31,426 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2022-12-14 11:09:31,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-14 11:09:31,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-14 11:09:31,627 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:09:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:09:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1483512696, now seen corresponding path program 30 times [2022-12-14 11:09:31,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:09:31,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550655097] [2022-12-14 11:09:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:09:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:09:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:09:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 127 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:33,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:09:33,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550655097] [2022-12-14 11:09:33,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550655097] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:09:33,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494029063] [2022-12-14 11:09:33,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:09:33,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:09:33,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:09:33,848 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:09:33,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-14 11:09:34,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:09:34,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:09:34,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 139 conjunts are in the unsatisfiable core [2022-12-14 11:09:34,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:09:34,871 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 10 treesize of output 8 [2022-12-14 11:09:35,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:09:35,987 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 17 treesize of output 19 [2022-12-14 11:09:36,288 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 15 treesize of output 7 [2022-12-14 11:09:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 127 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:36,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:09:36,482 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3147 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3147) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 18 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-12-14 11:09:36,487 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:09:36,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-14 11:09:36,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:09:36,492 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 37 treesize of output 32 [2022-12-14 11:09:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 127 proven. 1584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:36,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494029063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:09:36,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269887259] [2022-12-14 11:09:36,784 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:09:36,784 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:09:36,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:09:36,784 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:09:36,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:09:36,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:09:36,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:09:36,832 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:09:36,868 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:09:36,896 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:09:36,931 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:09:36,975 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:09:36,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 11:09:37,518 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:09:44,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '343778#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:09:44,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:09:44,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:09:44,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 70 [2022-12-14 11:09:44,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223172446] [2022-12-14 11:09:44,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:09:44,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 11:09:44,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:09:44,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 11:09:44,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6570, Unknown=1, NotChecked=162, Total=6972 [2022-12-14 11:09:44,192 INFO L87 Difference]: Start difference. First operand 4420 states and 5703 transitions. Second operand has 71 states, 71 states have (on average 3.6056338028169015) internal successors, (256), 70 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:09:49,570 INFO L93 Difference]: Finished difference Result 8586 states and 11067 transitions. [2022-12-14 11:09:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-14 11:09:49,570 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.6056338028169015) internal successors, (256), 70 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-12-14 11:09:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:09:49,573 INFO L225 Difference]: With dead ends: 8586 [2022-12-14 11:09:49,573 INFO L226 Difference]: Without dead ends: 4423 [2022-12-14 11:09:49,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 519 SyntacticMatches, 22 SemanticMatches, 122 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 2804 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=617, Invalid=14392, Unknown=1, NotChecked=242, Total=15252 [2022-12-14 11:09:49,574 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 1275 mSDsluCounter, 4150 mSDsCounter, 0 mSdLazyCounter, 7180 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 4242 SdHoareTripleChecker+Invalid, 7417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 7180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:09:49,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 4242 Invalid, 7417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 7180 Invalid, 0 Unknown, 217 Unchecked, 3.1s Time] [2022-12-14 11:09:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4423 states. [2022-12-14 11:09:49,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4423 to 4422. [2022-12-14 11:09:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4421 states have (on average 1.2904320289527256) internal successors, (5705), 4421 states have internal predecessors, (5705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 5705 transitions. [2022-12-14 11:09:49,601 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 5705 transitions. Word has length 194 [2022-12-14 11:09:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:09:49,601 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 5705 transitions. [2022-12-14 11:09:49,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.6056338028169015) internal successors, (256), 70 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:09:49,601 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 5705 transitions. [2022-12-14 11:09:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-12-14 11:09:49,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:09:49,603 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2022-12-14 11:09:49,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-14 11:09:49,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:09:49,804 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:09:49,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:09:49,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1941357714, now seen corresponding path program 31 times [2022-12-14 11:09:49,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:09:49,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107346849] [2022-12-14 11:09:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:09:49,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:09:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:09:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 289 proven. 1459 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:51,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:09:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107346849] [2022-12-14 11:09:51,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107346849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:09:51,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36754034] [2022-12-14 11:09:51,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:09:51,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:09:51,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:09:51,386 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:09:51,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 11:09:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:09:51,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-14 11:09:51,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:09:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 324 proven. 1424 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:52,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:09:53,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 11:09:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 324 proven. 1424 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:09:54,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36754034] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:09:54,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017247314] [2022-12-14 11:09:54,485 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:09:54,486 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:09:54,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:09:54,486 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:09:54,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:09:54,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:09:54,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:09:54,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:09:54,560 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:09:54,591 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:09:54,635 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:09:54,671 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:09:54,671 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 24 [2022-12-14 11:09:55,176 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:09:59,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '358137#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:09:59,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:09:59,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:09:59,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 86 [2022-12-14 11:09:59,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830213545] [2022-12-14 11:09:59,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:09:59,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-12-14 11:09:59,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:09:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-12-14 11:09:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=9288, Unknown=0, NotChecked=0, Total=10302 [2022-12-14 11:09:59,372 INFO L87 Difference]: Start difference. First operand 4422 states and 5705 transitions. Second operand has 88 states, 87 states have (on average 4.620689655172414) internal successors, (402), 87 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:10:02,113 INFO L93 Difference]: Finished difference Result 4868 states and 6283 transitions. [2022-12-14 11:10:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-14 11:10:02,113 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 4.620689655172414) internal successors, (402), 87 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-12-14 11:10:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:10:02,116 INFO L225 Difference]: With dead ends: 4868 [2022-12-14 11:10:02,116 INFO L226 Difference]: Without dead ends: 4868 [2022-12-14 11:10:02,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 507 SyntacticMatches, 20 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5863 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2320, Invalid=13180, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 11:10:02,117 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 2147 mSDsluCounter, 2549 mSDsCounter, 0 mSdLazyCounter, 4916 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2147 SdHoareTripleChecker+Valid, 2650 SdHoareTripleChecker+Invalid, 4917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:10:02,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2147 Valid, 2650 Invalid, 4917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4916 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 11:10:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2022-12-14 11:10:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4650. [2022-12-14 11:10:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4650 states, 4649 states have (on average 1.2903850290385028) internal successors, (5999), 4649 states have internal predecessors, (5999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4650 states to 4650 states and 5999 transitions. [2022-12-14 11:10:02,147 INFO L78 Accepts]: Start accepts. Automaton has 4650 states and 5999 transitions. Word has length 196 [2022-12-14 11:10:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:10:02,147 INFO L495 AbstractCegarLoop]: Abstraction has 4650 states and 5999 transitions. [2022-12-14 11:10:02,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 4.620689655172414) internal successors, (402), 87 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4650 states and 5999 transitions. [2022-12-14 11:10:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-12-14 11:10:02,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:10:02,149 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2022-12-14 11:10:02,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-14 11:10:02,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-12-14 11:10:02,351 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:10:02,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:10:02,351 INFO L85 PathProgramCache]: Analyzing trace with hash 737155591, now seen corresponding path program 32 times [2022-12-14 11:10:02,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:10:02,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049377297] [2022-12-14 11:10:02,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:02,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:10:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 134 proven. 1767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:10:05,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:10:05,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049377297] [2022-12-14 11:10:05,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049377297] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:10:05,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929900199] [2022-12-14 11:10:05,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:10:05,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:05,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:10:05,128 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:10:05,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 11:10:08,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-12-14 11:10:08,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:10:08,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 163 conjunts are in the unsatisfiable core [2022-12-14 11:10:08,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:10:08,039 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 10 treesize of output 8 [2022-12-14 11:10:09,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:10:09,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 11:10:12,898 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 11:10:12,898 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 29 treesize of output 13 [2022-12-14 11:10:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 20 proven. 1881 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:10:12,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:10:16,587 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrcspn_~s~0#1.offset| Int) (v_ArrVal_3340 (Array Int Int)) (|ULTIMATE.start_cstrcspn_~s~0#1.base| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3340))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|))) (or (= (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 19 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1) (not (= .cse1 0)))))) is different from false [2022-12-14 11:10:16,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:10:16,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-12-14 11:10:16,619 INFO L321 Elim1Store]: treesize reduction 4, result has 89.2 percent of original size [2022-12-14 11:10:16,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 110 [2022-12-14 11:10:16,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:10:16,628 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 74 treesize of output 70 [2022-12-14 11:10:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 20 proven. 1881 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:10:19,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929900199] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:10:19,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406049718] [2022-12-14 11:10:19,115 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:10:19,115 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:10:19,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:10:19,116 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:10:19,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:10:19,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:19,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:10:19,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 11:10:19,195 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:10:19,221 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:10:19,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:10:19,277 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:10:19,277 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 24 [2022-12-14 11:10:19,733 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:10:26,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '369076#(and (<= |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|)) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_cstrcspn_~s~0#1.offset| |ULTIMATE.start_cstrcspn_~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (= (select |#valid| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) 1) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= (+ |ULTIMATE.start_cstrcspn_~s~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~s~0#1.base|)) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~s~0#1.base|) |ULTIMATE.start_cstrcspn_~s~0#1.offset|) |ULTIMATE.start_cstrcspn_~c~0#1|)) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ (- 1) |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|)) |ULTIMATE.start_cstrcspn_~c~0#1|) (= |ULTIMATE.start_cstrcspn_~s2#1.base| |ULTIMATE.start_cstrcspn_~s~0#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 1 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (not (<= (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|))) (= (select |#valid| |ULTIMATE.start_cstrcspn_~s~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:10:26,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:10:26,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:10:26,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 48] total 142 [2022-12-14 11:10:26,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572658950] [2022-12-14 11:10:26,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:10:26,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-12-14 11:10:26,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:10:26,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-12-14 11:10:26,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=23728, Unknown=1, NotChecked=308, Total=24492 [2022-12-14 11:10:26,373 INFO L87 Difference]: Start difference. First operand 4650 states and 5999 transitions. Second operand has 143 states, 143 states have (on average 4.223776223776224) internal successors, (604), 142 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:45,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:10:45,738 INFO L93 Difference]: Finished difference Result 9044 states and 11657 transitions. [2022-12-14 11:10:45,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-14 11:10:45,738 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 4.223776223776224) internal successors, (604), 142 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2022-12-14 11:10:45,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:10:45,741 INFO L225 Difference]: With dead ends: 9044 [2022-12-14 11:10:45,741 INFO L226 Difference]: Without dead ends: 4653 [2022-12-14 11:10:45,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 504 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9664 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=1443, Invalid=54492, Unknown=1, NotChecked=470, Total=56406 [2022-12-14 11:10:45,743 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1413 mSDsluCounter, 6796 mSDsCounter, 0 mSdLazyCounter, 16806 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 6874 SdHoareTripleChecker+Invalid, 17047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 16806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:10:45,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 6874 Invalid, 17047 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 16806 Invalid, 0 Unknown, 216 Unchecked, 8.2s Time] [2022-12-14 11:10:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4653 states. [2022-12-14 11:10:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4653 to 4652. [2022-12-14 11:10:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 1.2902601591055687) internal successors, (6001), 4651 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 6001 transitions. [2022-12-14 11:10:45,776 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 6001 transitions. Word has length 204 [2022-12-14 11:10:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:10:45,776 INFO L495 AbstractCegarLoop]: Abstraction has 4652 states and 6001 transitions. [2022-12-14 11:10:45,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 4.223776223776224) internal successors, (604), 142 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:10:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 6001 transitions. [2022-12-14 11:10:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-12-14 11:10:45,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:10:45,778 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2022-12-14 11:10:45,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-14 11:10:45,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-12-14 11:10:45,979 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:10:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:10:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1536540285, now seen corresponding path program 33 times [2022-12-14 11:10:45,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:10:45,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876756415] [2022-12-14 11:10:45,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:10:45,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:10:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:10:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 324 proven. 1616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:10:47,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:10:47,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876756415] [2022-12-14 11:10:47,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876756415] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:10:47,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399120062] [2022-12-14 11:10:47,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:10:47,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:10:47,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:10:47,867 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:10:47,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-14 11:10:49,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:10:49,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:10:49,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 119 conjunts are in the unsatisfiable core [2022-12-14 11:10:49,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:10:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 361 proven. 1579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:10:50,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:10:51,677 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 22 treesize of output 18 [2022-12-14 11:10:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 361 proven. 1579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:10:52,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399120062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:10:52,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467920424] [2022-12-14 11:10:52,786 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 11:10:52,786 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:10:52,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:10:52,786 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:10:52,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:10:52,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:10:52,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 11:10:52,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:10:52,863 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:10:52,879 INFO L350 Elim1Store]: Elim1 eliminated variable 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 14 treesize of output 10 [2022-12-14 11:10:52,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 11:10:52,958 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-14 11:10:52,959 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 24 [2022-12-14 11:10:53,234 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:11:00,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '384289#(and (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.offset|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.offset|) (<= |ULTIMATE.start_cstrcspn_~s1#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.base|) (<= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.offset|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.base|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s1#1.offset|) (<= 0 |ULTIMATE.start_cstrcspn_#in~s2#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.offset|) (<= |ULTIMATE.start_main_~length2~0#1| 1) (<= 0 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= |ULTIMATE.start_cstrcspn_~s2#1.offset| 0) (< (select |#length| |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (+ |ULTIMATE.start_cstrcspn_~sc1~0#1.offset| 1)) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= |ULTIMATE.start_cstrcspn_#in~s2#1.offset| 0) (<= 0 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 1 |ULTIMATE.start_main_~length2~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc12#1.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s1#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_cstrcspn_~s2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_cstrcspn_~sc1~0#1.base|) (<= |ULTIMATE.start_cstrcspn_#in~s1#1.offset| 0) (<= 0 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 0 |ULTIMATE.start_main_~nondetString2~0#1.base|) (= |#NULL.base| 0))' at error location [2022-12-14 11:11:00,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:11:00,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:11:00,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 109 [2022-12-14 11:11:00,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072729811] [2022-12-14 11:11:00,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:11:00,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-12-14 11:11:00,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:11:00,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-12-14 11:11:00,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=13502, Unknown=0, NotChecked=0, Total=15252 [2022-12-14 11:11:00,545 INFO L87 Difference]: Start difference. First operand 4652 states and 6001 transitions. Second operand has 111 states, 110 states have (on average 4.2272727272727275) internal successors, (465), 110 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:11:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:11:03,366 INFO L93 Difference]: Finished difference Result 5098 states and 6579 transitions. [2022-12-14 11:11:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 11:11:03,367 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 4.2272727272727275) internal successors, (465), 110 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-12-14 11:11:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:11:03,370 INFO L225 Difference]: With dead ends: 5098 [2022-12-14 11:11:03,370 INFO L226 Difference]: Without dead ends: 5098 [2022-12-14 11:11:03,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 517 SyntacticMatches, 20 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8942 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=3675, Invalid=18081, Unknown=0, NotChecked=0, Total=21756 [2022-12-14 11:11:03,371 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 2954 mSDsluCounter, 2360 mSDsCounter, 0 mSdLazyCounter, 4431 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2954 SdHoareTripleChecker+Valid, 2466 SdHoareTripleChecker+Invalid, 4432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:11:03,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2954 Valid, 2466 Invalid, 4432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4431 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 11:11:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5098 states. [2022-12-14 11:11:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5098 to 4880. [2022-12-14 11:11:03,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4880 states, 4879 states have (on average 1.290223406435745) internal successors, (6295), 4879 states have internal predecessors, (6295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:11:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4880 states to 4880 states and 6295 transitions. [2022-12-14 11:11:03,399 INFO L78 Accepts]: Start accepts. Automaton has 4880 states and 6295 transitions. Word has length 206 [2022-12-14 11:11:03,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:11:03,400 INFO L495 AbstractCegarLoop]: Abstraction has 4880 states and 6295 transitions. [2022-12-14 11:11:03,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 4.2272727272727275) internal successors, (465), 110 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:11:03,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4880 states and 6295 transitions. [2022-12-14 11:11:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-12-14 11:11:03,402 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:11:03,402 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2022-12-14 11:11:03,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-14 11:11:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:03,604 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-14 11:11:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:11:03,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1542709738, now seen corresponding path program 34 times [2022-12-14 11:11:03,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:11:03,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535828069] [2022-12-14 11:11:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:11:03,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:11:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 141 proven. 1960 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:11:06,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:11:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535828069] [2022-12-14 11:11:06,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535828069] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:11:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479453191] [2022-12-14 11:11:06,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:11:06,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:11:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:11:06,766 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:11:06,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4565a0b0-8497-4839-bb87-8cfa5497c42a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 11:11:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:11:06,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 153 conjunts are in the unsatisfiable core [2022-12-14 11:11:06,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:11:07,002 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 10 treesize of output 8