./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 --- 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-5e519f3 [2022-11-03 01:51:22,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:51:22,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:51:22,615 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:51:22,615 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:51:22,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:51:22,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:51:22,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:51:22,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:51:22,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:51:22,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:51:22,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:51:22,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:51:22,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:51:22,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:51:22,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:51:22,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:51:22,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:51:22,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:51:22,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:51:22,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:51:22,657 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:51:22,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:51:22,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:51:22,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:51:22,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:51:22,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:51:22,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:51:22,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:51:22,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:51:22,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:51:22,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:51:22,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:51:22,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:51:22,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:51:22,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:51:22,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:51:22,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:51:22,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:51:22,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:51:22,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:51:22,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:51:22,737 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:51:22,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:51:22,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:51:22,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:51:22,740 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:51:22,740 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:51:22,740 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:51:22,740 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:51:22,740 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:51:22,741 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:51:22,742 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:51:22,742 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:51:22,742 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:51:22,742 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:51:22,743 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:51:22,743 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:51:22,743 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:51:22,743 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:51:22,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:51:22,744 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:51:22,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:51:22,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:51:22,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:51:22,745 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:51:22,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:51:22,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:51:22,746 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:51:22,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:51:22,746 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:51:22,746 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:51:22,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:51:22,747 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:51:22,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:51:22,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:51:22,748 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:51:22,748 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:51:22,748 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:51:22,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:51:22,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:51:22,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:51:22,749 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:51:22,750 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_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 [2022-11-03 01:51:23,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:51:23,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:51:23,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:51:23,041 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:51:23,041 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:51:23,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2022-11-03 01:51:23,110 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/data/a7e3e6271/5a1e0ddd24504cd6b8be1a6c266846b2/FLAG86fcfee25 [2022-11-03 01:51:23,516 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:51:23,517 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2022-11-03 01:51:23,524 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/data/a7e3e6271/5a1e0ddd24504cd6b8be1a6c266846b2/FLAG86fcfee25 [2022-11-03 01:51:23,916 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/data/a7e3e6271/5a1e0ddd24504cd6b8be1a6c266846b2 [2022-11-03 01:51:23,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:51:23,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:51:23,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:51:23,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:51:23,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:51:23,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:51:23" (1/1) ... [2022-11-03 01:51:23,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d64335a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:23, skipping insertion in model container [2022-11-03 01:51:23,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:51:23" (1/1) ... [2022-11-03 01:51:23,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:51:23,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:51:24,186 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2022-11-03 01:51:24,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:51:24,215 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:51:24,232 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i[896,909] [2022-11-03 01:51:24,253 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:51:24,268 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:51:24,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24 WrapperNode [2022-11-03 01:51:24,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:51:24,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:51:24,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:51:24,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:51:24,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,311 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-11-03 01:51:24,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:51:24,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:51:24,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:51:24,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:51:24,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,358 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:51:24,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:51:24,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:51:24,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:51:24,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (1/1) ... [2022-11-03 01:51:24,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:51:24,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:24,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:51:24,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:51:24,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:51:24,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:51:24,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:51:24,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:51:24,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:51:24,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:51:24,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:51:24,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:51:24,524 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:51:24,526 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:51:24,653 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:51:24,684 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:51:24,685 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 01:51:24,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:51:24 BoogieIcfgContainer [2022-11-03 01:51:24,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:51:24,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:51:24,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:51:24,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:51:24,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:51:23" (1/3) ... [2022-11-03 01:51:24,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af81dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:51:24, skipping insertion in model container [2022-11-03 01:51:24,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:51:24" (2/3) ... [2022-11-03 01:51:24,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af81dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:51:24, skipping insertion in model container [2022-11-03 01:51:24,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:51:24" (3/3) ... [2022-11-03 01:51:24,699 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2022-11-03 01:51:24,717 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:51:24,718 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:51:24,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:51:24,778 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@2f33b981, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:51:24,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:51:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:24,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:51:24,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:24,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:24,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:24,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:24,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1167627734, now seen corresponding path program 1 times [2022-11-03 01:51:24,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:24,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856972580] [2022-11-03 01:51:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:24,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:25,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:25,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856972580] [2022-11-03 01:51:25,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856972580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:25,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:25,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:51:25,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674180862] [2022-11-03 01:51:25,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:25,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:51:25,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:25,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:51:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:51:25,136 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:25,198 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2022-11-03 01:51:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:51:25,201 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:51:25,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:25,209 INFO L225 Difference]: With dead ends: 22 [2022-11-03 01:51:25,223 INFO L226 Difference]: Without dead ends: 11 [2022-11-03 01:51:25,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:51:25,230 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:25,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:51:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-03 01:51:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-03 01:51:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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) [2022-11-03 01:51:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-03 01:51:25,294 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-03 01:51:25,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:25,294 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-03 01:51:25,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-03 01:51:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 01:51:25,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:25,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:25,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:51:25,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:25,297 INFO L85 PathProgramCache]: Analyzing trace with hash 250954131, now seen corresponding path program 1 times [2022-11-03 01:51:25,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:25,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11337766] [2022-11-03 01:51:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:25,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:25,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:25,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11337766] [2022-11-03 01:51:25,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11337766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:25,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:51:25,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:51:25,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70495515] [2022-11-03 01:51:25,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:25,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:51:25,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:51:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:51:25,462 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:25,498 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-11-03 01:51:25,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:51:25,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 01:51:25,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:25,501 INFO L225 Difference]: With dead ends: 21 [2022-11-03 01:51:25,502 INFO L226 Difference]: Without dead ends: 12 [2022-11-03 01:51:25,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:51:25,505 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:25,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:51:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-03 01:51:25,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-03 01:51:25,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-03 01:51:25,517 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-11-03 01:51:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:25,520 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-03 01:51:25,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-03 01:51:25,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:51:25,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:25,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:25,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:51:25,523 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash 802215450, now seen corresponding path program 1 times [2022-11-03 01:51:25,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:25,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29634713] [2022-11-03 01:51:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:25,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:25,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:25,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29634713] [2022-11-03 01:51:25,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29634713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:25,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986391497] [2022-11-03 01:51:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:25,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:25,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:25,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:25,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:51:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:25,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:51:25,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:25,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:51:25,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986391497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:25,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1380515665] [2022-11-03 01:51:25,895 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:51:25,895 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:25,901 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:25,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:25,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:26,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:26,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:26,099 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:51:26,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:51:26,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:26,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:26,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 01:51:26,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:26,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:51:26,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:26,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:26,399 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:51:26,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-03 01:51:26,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:51:26,681 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:26,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1380515665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:51:26,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:26,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2022-11-03 01:51:26,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027696247] [2022-11-03 01:51:26,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:51:26,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:51:26,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:26,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:51:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:51:26,983 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2022-11-03 01:51:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:27,063 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-11-03 01:51:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:51:27,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 [2022-11-03 01:51:27,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:27,064 INFO L225 Difference]: With dead ends: 23 [2022-11-03 01:51:27,064 INFO L226 Difference]: Without dead ends: 14 [2022-11-03 01:51:27,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:51:27,065 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:27,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:51:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-03 01:51:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-03 01:51:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-03 01:51:27,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2022-11-03 01:51:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:27,071 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-03 01:51:27,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2022-11-03 01:51:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-03 01:51:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 01:51:27,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:27,072 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:27,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:27,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:27,297 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:27,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:27,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1187067622, now seen corresponding path program 1 times [2022-11-03 01:51:27,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:27,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249001424] [2022-11-03 01:51:27,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:27,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:51:27,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:27,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249001424] [2022-11-03 01:51:27,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249001424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:27,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37020313] [2022-11-03 01:51:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:27,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:27,413 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:27,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:51:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:51:27,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:51:27,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:51:27,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37020313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:27,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746408397] [2022-11-03 01:51:27,503 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:51:27,503 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:27,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:27,504 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:27,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:27,564 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 01:51:27,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 01:51:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:27,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:27,625 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:51:27,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:51:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:27,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:51:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:27,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:27,790 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:51:27,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-03 01:51:27,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:51:27,990 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:51:27,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-03 01:51:28,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:28,056 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:28,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:28,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:28,159 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:28,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:28,171 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:28,586 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '294#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:28,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:28,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:28,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 01:51:28,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494776852] [2022-11-03 01:51:28,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:28,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:51:28,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:51:28,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:51:28,588 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:28,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:28,611 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-03 01:51:28,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:51:28,611 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-03 01:51:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:28,612 INFO L225 Difference]: With dead ends: 28 [2022-11-03 01:51:28,612 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 01:51:28,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:51:28,613 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:28,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:51:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 01:51:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 01:51:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-03 01:51:28,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-11-03 01:51:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:28,620 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-03 01:51:28,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:28,620 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-03 01:51:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:51:28,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:28,621 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:28,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:28,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:28,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:28,840 INFO L85 PathProgramCache]: Analyzing trace with hash 59351519, now seen corresponding path program 2 times [2022-11-03 01:51:28,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:28,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674962782] [2022-11-03 01:51:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:28,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:51:28,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:28,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674962782] [2022-11-03 01:51:28,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674962782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:28,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127644476] [2022-11-03 01:51:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:51:28,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:28,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:28,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:28,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:51:29,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:51:29,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:51:29,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 01:51:29,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:29,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:51:29,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2022-11-03 01:51:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:51:29,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:29,304 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:51:29,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 82 treesize of output 78 [2022-11-03 01:51:29,338 INFO L356 Elim1Store]: treesize reduction 10, result has 67.7 percent of original size [2022-11-03 01:51:29,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 82 treesize of output 82 [2022-11-03 01:51:29,374 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:51:29,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 18 [2022-11-03 01:51:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:51:29,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127644476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:29,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533941964] [2022-11-03 01:51:29,473 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:51:29,473 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:29,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:29,473 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:29,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:29,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:29,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:29,532 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:51:29,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:51:29,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:29,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:29,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 01:51:29,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:29,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:51:29,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:29,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:29,695 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:51:29,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-03 01:51:29,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:51:29,847 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:51:29,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-03 01:51:29,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:29,894 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:29,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:29,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:29,980 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:29,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:29,989 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:30,399 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '463#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:30,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:30,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:30,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-11-03 01:51:30,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998420552] [2022-11-03 01:51:30,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:30,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 01:51:30,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:30,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 01:51:30,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:51:30,401 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:30,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:30,633 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-03 01:51:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:51:30,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 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) Word has length 15 [2022-11-03 01:51:30,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:30,634 INFO L225 Difference]: With dead ends: 35 [2022-11-03 01:51:30,634 INFO L226 Difference]: Without dead ends: 24 [2022-11-03 01:51:30,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:51:30,636 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:30,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:51:30,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-03 01:51:30,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-03 01:51:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-03 01:51:30,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2022-11-03 01:51:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:30,643 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-03 01:51:30,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-03 01:51:30,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 01:51:30,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:30,644 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:30,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:30,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:30,845 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash -803985518, now seen corresponding path program 1 times [2022-11-03 01:51:30,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:30,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732271490] [2022-11-03 01:51:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:30,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:51:31,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:31,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732271490] [2022-11-03 01:51:31,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732271490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:31,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851194857] [2022-11-03 01:51:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:31,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:31,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:31,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:31,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:51:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:51:31,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:51:31,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:51:31,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851194857] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:31,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [985351923] [2022-11-03 01:51:31,244 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:51:31,244 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:31,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:31,245 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:31,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:31,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:31,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:31,313 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:51:31,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:51:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:31,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 01:51:31,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:31,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:51:31,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:31,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:31,430 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:51:31,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-03 01:51:31,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:51:31,546 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:51:31,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-03 01:51:31,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:31,588 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:31,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:31,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:31,849 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:31,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:31,857 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:32,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '693#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:32,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:32,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:32,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-03 01:51:32,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467095316] [2022-11-03 01:51:32,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:32,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:51:32,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:32,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:51:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:51:32,638 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:32,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:32,681 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-03 01:51:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 01:51:32,682 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 01:51:32,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:32,684 INFO L225 Difference]: With dead ends: 42 [2022-11-03 01:51:32,684 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 01:51:32,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-11-03 01:51:32,686 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:32,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:51:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 01:51:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-03 01:51:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-03 01:51:32,701 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2022-11-03 01:51:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:32,701 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-03 01:51:32,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-03 01:51:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 01:51:32,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:32,705 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:32,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:32,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 01:51:32,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:32,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:32,925 INFO L85 PathProgramCache]: Analyzing trace with hash 571138891, now seen corresponding path program 2 times [2022-11-03 01:51:32,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:32,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529825477] [2022-11-03 01:51:32,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:32,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:51:33,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:33,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529825477] [2022-11-03 01:51:33,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529825477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:33,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535914956] [2022-11-03 01:51:33,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:51:33,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:33,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:33,261 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:33,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:51:33,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:51:33,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:51:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:51:33,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 01:51:33,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:33,654 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:51:33,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2022-11-03 01:51:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 01:51:33,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535914956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:33,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695412259] [2022-11-03 01:51:33,693 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:51:33,693 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:33,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:33,694 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:33,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:33,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:33,746 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:51:33,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:51:33,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:33,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:33,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 01:51:33,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:33,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:51:33,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:33,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:33,873 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:51:33,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-03 01:51:33,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:51:33,998 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:51:33,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-03 01:51:34,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:34,058 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:34,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:34,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:34,284 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:34,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:34,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:35,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '989#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:35,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:35,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:35,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 24 [2022-11-03 01:51:35,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458544200] [2022-11-03 01:51:35,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:35,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 01:51:35,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 01:51:35,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:51:35,274 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-11-03 01:51:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:35,714 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-11-03 01:51:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 01:51:35,715 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) Word has length 27 [2022-11-03 01:51:35,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:35,715 INFO L225 Difference]: With dead ends: 59 [2022-11-03 01:51:35,715 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 01:51:35,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 01:51:35,717 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:35,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 66 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:51:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 01:51:35,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-03 01:51:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:35,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-11-03 01:51:35,724 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2022-11-03 01:51:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:35,725 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-11-03 01:51:35,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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) [2022-11-03 01:51:35,726 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-11-03 01:51:35,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:51:35,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:35,726 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:35,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:35,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:35,941 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:35,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1693520930, now seen corresponding path program 3 times [2022-11-03 01:51:35,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:35,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016252792] [2022-11-03 01:51:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:35,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:51:36,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:36,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016252792] [2022-11-03 01:51:36,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016252792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587690197] [2022-11-03 01:51:36,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:51:36,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:36,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:36,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:51:36,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:51:36,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:51:36,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:51:36,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:51:36,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:51:36,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587690197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:36,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [56861687] [2022-11-03 01:51:36,766 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:51:36,766 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:36,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:36,766 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:36,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:36,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:36,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:36,826 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:51:36,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:51:36,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:36,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:36,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 01:51:36,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:36,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:51:36,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:36,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:36,934 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:51:36,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-03 01:51:36,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:51:37,041 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:51:37,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-03 01:51:37,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:37,076 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:37,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:37,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:37,290 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:37,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:37,297 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:38,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1366#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:38,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:38,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:38,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2022-11-03 01:51:38,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561851185] [2022-11-03 01:51:38,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:38,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 01:51:38,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:38,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 01:51:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=920, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:51:38,149 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:38,231 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-11-03 01:51:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 01:51:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 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 30 [2022-11-03 01:51:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:38,232 INFO L225 Difference]: With dead ends: 62 [2022-11-03 01:51:38,232 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 01:51:38,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=486, Invalid=920, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 01:51:38,234 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:38,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:51:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 01:51:38,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-03 01:51:38,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-11-03 01:51:38,245 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 30 [2022-11-03 01:51:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:38,245 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-11-03 01:51:38,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-11-03 01:51:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 01:51:38,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:38,247 INFO L195 NwaCegarLoop]: trace histogram [28, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:38,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:38,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:38,449 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:38,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1024276521, now seen corresponding path program 4 times [2022-11-03 01:51:38,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:38,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691447424] [2022-11-03 01:51:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:38,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:51:39,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691447424] [2022-11-03 01:51:39,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691447424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004429098] [2022-11-03 01:51:39,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:51:39,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:39,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:39,310 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:39,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:51:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:39,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:51:39,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:51:39,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:51:40,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004429098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1768104913] [2022-11-03 01:51:40,727 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:51:40,727 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:40,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:40,727 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:40,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:40,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:40,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:40,773 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 01:51:40,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 01:51:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:40,824 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:51:40,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:51:40,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:40,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:51:40,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:40,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:40,933 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:51:40,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-03 01:51:41,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:51:41,065 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:51:41,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-03 01:51:41,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:41,118 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:41,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:41,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:41,350 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:41,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:41,356 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:42,230 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1879#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:42,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:42,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:42,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2022-11-03 01:51:42,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287907912] [2022-11-03 01:51:42,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:42,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-03 01:51:42,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:42,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-03 01:51:42,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1851, Invalid=2705, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 01:51:42,240 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 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) [2022-11-03 01:51:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:42,368 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2022-11-03 01:51:42,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-03 01:51:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 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 45 [2022-11-03 01:51:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:42,371 INFO L225 Difference]: With dead ends: 92 [2022-11-03 01:51:42,372 INFO L226 Difference]: Without dead ends: 76 [2022-11-03 01:51:42,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1851, Invalid=2705, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 01:51:42,376 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:42,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:51:42,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-03 01:51:42,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-03 01:51:42,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 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) [2022-11-03 01:51:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-11-03 01:51:42,412 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 45 [2022-11-03 01:51:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:42,414 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-11-03 01:51:42,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 60 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) [2022-11-03 01:51:42,414 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-11-03 01:51:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 01:51:42,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:42,421 INFO L195 NwaCegarLoop]: trace histogram [58, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:42,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:42,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:42,639 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:42,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1698972425, now seen corresponding path program 5 times [2022-11-03 01:51:42,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:42,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167597228] [2022-11-03 01:51:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:42,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:51:45,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167597228] [2022-11-03 01:51:45,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167597228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074273056] [2022-11-03 01:51:45,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:51:45,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:45,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:45,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:45,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:51:45,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:51:45,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:51:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:51:45,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:45,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:51:45,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 19 [2022-11-03 01:51:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-03 01:51:46,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:46,354 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:51:46,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 92 treesize of output 88 [2022-11-03 01:51:46,396 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 01:51:46,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 29 [2022-11-03 01:51:46,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 [2022-11-03 01:51:46,408 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 01:51:46,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 1 [2022-11-03 01:51:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:46,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2022-11-03 01:51:46,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 [2022-11-03 01:51:46,429 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 01:51:46,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 16 [2022-11-03 01:51:46,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:46,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:46,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2022-11-03 01:51:46,443 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-03 01:51:46,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 1 [2022-11-03 01:51:46,450 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-03 01:51:46,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 63 treesize of output 1 [2022-11-03 01:51:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1720 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-03 01:51:46,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074273056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:46,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7303885] [2022-11-03 01:51:46,628 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:51:46,628 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:46,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:46,629 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:46,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:46,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:46,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:46,671 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 01:51:46,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 01:51:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:46,718 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:51:46,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:51:46,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:46,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:51:46,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:46,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:46,814 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:51:46,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-03 01:51:46,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:51:46,916 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:51:46,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-11-03 01:51:46,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:46,953 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:46,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:47,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:47,117 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:47,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:47,125 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:47,984 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2703#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:47,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:47,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:47,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 71 [2022-11-03 01:51:47,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320834654] [2022-11-03 01:51:47,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:47,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-03 01:51:47,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:47,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-03 01:51:47,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1889, Invalid=4273, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 01:51:47,989 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 71 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) [2022-11-03 01:51:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:51:50,750 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2022-11-03 01:51:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-03 01:51:50,751 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 71 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 75 [2022-11-03 01:51:50,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:51:50,752 INFO L225 Difference]: With dead ends: 100 [2022-11-03 01:51:50,752 INFO L226 Difference]: Without dead ends: 84 [2022-11-03 01:51:50,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5621, Invalid=13839, Unknown=0, NotChecked=0, Total=19460 [2022-11-03 01:51:50,757 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:51:50,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 56 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:51:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-03 01:51:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2022-11-03 01:51:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:51:50,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-11-03 01:51:50,774 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2022-11-03 01:51:50,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:51:50,774 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-11-03 01:51:50,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4305555555555556) internal successors, (103), 71 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) [2022-11-03 01:51:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-11-03 01:51:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:51:50,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:51:50,776 INFO L195 NwaCegarLoop]: trace histogram [59, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:51:50,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:51:50,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:50,981 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:51:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:51:50,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1118946774, now seen corresponding path program 6 times [2022-11-03 01:51:50,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:51:50,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115077981] [2022-11-03 01:51:50,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:51:50,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:51:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:51:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:51:53,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:51:53,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115077981] [2022-11-03 01:51:53,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115077981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:51:53,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360535969] [2022-11-03 01:51:53,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:51:53,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:51:53,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:51:53,869 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:51:53,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:51:54,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:51:54,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:51:54,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 01:51:54,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:51:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:51:54,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:51:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:51:58,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360535969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:51:58,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1475330408] [2022-11-03 01:51:58,544 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:51:58,544 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:51:58,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:51:58,545 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:51:58,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:51:58,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:58,591 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 01:51:58,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 01:51:58,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:58,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:58,646 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:51:58,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:51:58,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:58,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 01:51:58,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:51:58,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:58,783 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-03 01:51:58,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-03 01:51:58,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:51:58,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:58,899 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:58,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 01:51:58,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:58,939 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:58,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:59,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:51:59,115 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:51:59,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:51:59,120 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:51:59,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3748#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 01:51:59,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:51:59,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:51:59,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 122 [2022-11-03 01:51:59,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072416860] [2022-11-03 01:51:59,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:51:59,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-03 01:51:59,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:51:59,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-03 01:51:59,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7524, Invalid=9246, Unknown=0, NotChecked=0, Total=16770 [2022-11-03 01:51:59,886 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:00,124 INFO L93 Difference]: Finished difference Result 162 states and 226 transitions. [2022-11-03 01:52:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-03 01:52:00,125 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 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 80 [2022-11-03 01:52:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:00,126 INFO L225 Difference]: With dead ends: 162 [2022-11-03 01:52:00,126 INFO L226 Difference]: Without dead ends: 142 [2022-11-03 01:52:00,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=7524, Invalid=9246, Unknown=0, NotChecked=0, Total=16770 [2022-11-03 01:52:00,130 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:00,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:52:00,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-03 01:52:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-11-03 01:52:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-11-03 01:52:00,160 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 80 [2022-11-03 01:52:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:00,161 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-11-03 01:52:00,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.089430894308943) internal successors, (134), 122 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:52:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-11-03 01:52:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 01:52:00,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:00,175 INFO L195 NwaCegarLoop]: trace histogram [120, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:00,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:00,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:00,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:00,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1302174211, now seen corresponding path program 7 times [2022-11-03 01:52:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:00,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75011175] [2022-11-03 01:52:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:00,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:52:10,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:52:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75011175] [2022-11-03 01:52:10,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75011175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:52:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061007854] [2022-11-03 01:52:10,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:52:10,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:52:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:52:10,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:52:10,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:52:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:52:10,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-03 01:52:10,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:52:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:52:10,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:52:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7276 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:52:27,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061007854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:52:27,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [88147948] [2022-11-03 01:52:27,999 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:52:27,999 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:52:27,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:52:27,999 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:52:28,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:52:28,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:28,048 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:52:28,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:52:28,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:28,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:28,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-03 01:52:28,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:28,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:52:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:52:28,152 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:52:28,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-03 01:52:28,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:52:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:28,242 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:52:28,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 01:52:28,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:28,276 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:52:28,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:52:28,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:52:28,429 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:52:28,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:52:28,435 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:52:29,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5404#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 01:52:29,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:52:29,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:52:29,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 244 [2022-11-03 01:52:29,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770044536] [2022-11-03 01:52:29,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:52:29,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 245 states [2022-11-03 01:52:29,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:52:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2022-11-03 01:52:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29911, Invalid=33341, Unknown=0, NotChecked=0, Total=63252 [2022-11-03 01:52:29,620 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 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) [2022-11-03 01:52:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:52:30,537 INFO L93 Difference]: Finished difference Result 284 states and 409 transitions. [2022-11-03 01:52:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 244 states. [2022-11-03 01:52:30,537 INFO L78 Accepts]: Start accepts. Automaton has has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 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 141 [2022-11-03 01:52:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:52:30,539 INFO L225 Difference]: With dead ends: 284 [2022-11-03 01:52:30,539 INFO L226 Difference]: Without dead ends: 264 [2022-11-03 01:52:30,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=29911, Invalid=33341, Unknown=0, NotChecked=0, Total=63252 [2022-11-03 01:52:30,544 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:52:30,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:52:30,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-03 01:52:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-11-03 01:52:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0114068441064639) internal successors, (266), 263 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) [2022-11-03 01:52:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2022-11-03 01:52:30,595 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 141 [2022-11-03 01:52:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:52:30,596 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2022-11-03 01:52:30,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 245 states, 245 states have (on average 1.0448979591836736) internal successors, (256), 244 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) [2022-11-03 01:52:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2022-11-03 01:52:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-03 01:52:30,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:52:30,600 INFO L195 NwaCegarLoop]: trace histogram [242, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:52:30,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:52:30,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:52:30,813 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:52:30,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:52:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1683284125, now seen corresponding path program 8 times [2022-11-03 01:52:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:52:30,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743767908] [2022-11-03 01:52:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:52:30,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:52:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:53:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 0 proven. 29403 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 01:53:05,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:53:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743767908] [2022-11-03 01:53:05,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743767908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:53:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872159850] [2022-11-03 01:53:05,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:53:05,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:53:05,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:05,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:53:05,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:53:05,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:53:05,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:53:05,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:53:05,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:53:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 29403 trivial. 0 not checked. [2022-11-03 01:53:07,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:53:07,737 INFO L356 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-03 01:53:07,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2022-11-03 01:53:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 29419 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 29403 trivial. 0 not checked. [2022-11-03 01:53:08,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872159850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:53:08,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [705888480] [2022-11-03 01:53:08,227 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:53:08,227 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:53:08,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:53:08,228 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:53:08,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:53:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:08,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:08,271 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 01:53:08,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 01:53:08,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:08,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:08,329 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:53:08,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:53:08,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:08,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:53:08,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:08,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:53:08,431 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:53:08,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-03 01:53:08,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:53:08,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:08,524 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:53:08,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 01:53:08,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:08,560 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:53:08,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:53:08,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:53:08,742 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:53:08,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:53:08,747 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:53:12,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8293#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 01:53:12,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:53:12,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:53:12,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [244, 10, 10] total 257 [2022-11-03 01:53:12,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670991014] [2022-11-03 01:53:12,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:53:12,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 258 states [2022-11-03 01:53:12,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:53:12,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 258 interpolants. [2022-11-03 01:53:12,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29952, Invalid=40008, Unknown=0, NotChecked=0, Total=69960 [2022-11-03 01:53:12,025 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand has 258 states, 258 states have (on average 1.1085271317829457) internal successors, (286), 257 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:40,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:53:40,513 INFO L93 Difference]: Finished difference Result 305 states and 310 transitions. [2022-11-03 01:53:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2022-11-03 01:53:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 258 states, 258 states have (on average 1.1085271317829457) internal successors, (286), 257 states have internal predecessors, (286), 0 states have call successors, (0), 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 263 [2022-11-03 01:53:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:53:40,516 INFO L225 Difference]: With dead ends: 305 [2022-11-03 01:53:40,516 INFO L226 Difference]: Without dead ends: 274 [2022-11-03 01:53:40,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1276 GetRequests, 764 SyntacticMatches, 4 SemanticMatches, 508 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37284 ImplicationChecksByTransitivity, 54.7s TimeCoverageRelationStatistics Valid=89743, Invalid=169847, Unknown=0, NotChecked=0, Total=259590 [2022-11-03 01:53:40,526 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:53:40,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 81 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:53:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-03 01:53:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2022-11-03 01:53:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2022-11-03 01:53:40,578 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 263 [2022-11-03 01:53:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:53:40,578 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2022-11-03 01:53:40,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 258 states, 258 states have (on average 1.1085271317829457) internal successors, (286), 257 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:53:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2022-11-03 01:53:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-11-03 01:53:40,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:53:40,583 INFO L195 NwaCegarLoop]: trace histogram [243, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:53:40,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:53:40,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:53:40,801 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:53:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:53:40,802 INFO L85 PathProgramCache]: Analyzing trace with hash 548327542, now seen corresponding path program 9 times [2022-11-03 01:53:40,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:53:40,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252007683] [2022-11-03 01:53:40,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:53:40,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:53:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:54:15,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:15,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252007683] [2022-11-03 01:54:15,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252007683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:54:15,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988768583] [2022-11-03 01:54:15,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:54:15,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:54:15,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:54:15,389 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:54:15,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:54:16,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:54:16,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:54:16,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 2311 conjuncts, 245 conjunts are in the unsatisfiable core [2022-11-03 01:54:16,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:54:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:54:16,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:55:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 29668 backedges. 0 proven. 29646 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:55:24,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988768583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:55:24,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357372094] [2022-11-03 01:55:24,896 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 01:55:24,896 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:55:24,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:55:24,897 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:55:24,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:55:24,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:24,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:24,944 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 01:55:24,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 01:55:24,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:24,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:24,995 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 01:55:24,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 01:55:25,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:25,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 01:55:25,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:25,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:55:25,077 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 01:55:25,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-03 01:55:25,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 01:55:25,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:25,170 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:55:25,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 01:55:25,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:25,204 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:55:25,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:55:25,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:55:25,386 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 01:55:25,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 01:55:25,391 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:55:28,439 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11955#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 01:55:28,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:55:28,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:55:28,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [245, 245, 245] total 490 [2022-11-03 01:55:28,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582632173] [2022-11-03 01:55:28,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:55:28,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 491 states [2022-11-03 01:55:28,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:28,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 491 interpolants. [2022-11-03 01:55:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120316, Invalid=127190, Unknown=0, NotChecked=0, Total=247506 [2022-11-03 01:55:28,470 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:31,986 INFO L93 Difference]: Finished difference Result 534 states and 782 transitions. [2022-11-03 01:55:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 490 states. [2022-11-03 01:55:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 0 states have call successors, (0), 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 266 [2022-11-03 01:55:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:31,989 INFO L225 Difference]: With dead ends: 534 [2022-11-03 01:55:31,989 INFO L226 Difference]: Without dead ends: 512 [2022-11-03 01:55:32,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 542 SyntacticMatches, 3 SemanticMatches, 496 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8302 ImplicationChecksByTransitivity, 93.9s TimeCoverageRelationStatistics Valid=120316, Invalid=127190, Unknown=0, NotChecked=0, Total=247506 [2022-11-03 01:55:32,002 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:32,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:55:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-03 01:55:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-11-03 01:55:32,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.00587084148728) internal successors, (514), 511 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 514 transitions. [2022-11-03 01:55:32,063 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 514 transitions. Word has length 266 [2022-11-03 01:55:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:32,064 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 514 transitions. [2022-11-03 01:55:32,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 491 states, 491 states have (on average 1.0224032586558045) internal successors, (502), 490 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:55:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 514 transitions. [2022-11-03 01:55:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-11-03 01:55:32,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:32,074 INFO L195 NwaCegarLoop]: trace histogram [488, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:32,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:55:32,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:55:32,289 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1986981775, now seen corresponding path program 10 times [2022-11-03 01:55:32,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:32,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691401351] [2022-11-03 01:55:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:32,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:58:00,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:00,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691401351] [2022-11-03 01:58:00,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691401351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:00,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464004998] [2022-11-03 01:58:00,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:58:00,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:00,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:00,691 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:00,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c0d289-8351-4edf-94d8-22592ae43847/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:58:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:01,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 4516 conjuncts, 490 conjunts are in the unsatisfiable core [2022-11-03 01:58:01,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:58:02,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 119338 backedges. 0 proven. 119316 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:02:47,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464004998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:47,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [843424113] [2022-11-03 02:02:47,046 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 02:02:47,047 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:47,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:02:47,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:02:47,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:02:47,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,087 INFO L356 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-03 02:02:47,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-03 02:02:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,133 INFO L356 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-03 02:02:47,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-03 02:02:47,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 02:02:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:02:47,227 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-03 02:02:47,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-03 02:02:47,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:02:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:02:47,308 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:02:47,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-11-03 02:02:47,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:02:47,338 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:02:47,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:02:47,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:02:47,528 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-03 02:02:47,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 02:02:47,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:52,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18048#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~j~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_main_~i~0#1| 100000) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:52,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:52,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:52,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [490, 490, 490] total 980 [2022-11-03 02:02:52,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795808655] [2022-11-03 02:02:52,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:52,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 981 states [2022-11-03 02:02:52,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 981 interpolants. [2022-11-03 02:02:53,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480711, Invalid=494445, Unknown=0, NotChecked=0, Total=975156 [2022-11-03 02:02:53,112 INFO L87 Difference]: Start difference. First operand 512 states and 514 transitions. Second operand has 981 states, 981 states have (on average 1.0112130479102956) internal successors, (992), 980 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)