./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-01-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-01-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw --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 dd9f812dd0592e9d2894b2831060b27794691dcfdafe5c5494c28350656b71ee ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 05:50:53,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:50:53,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:50:53,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:50:53,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:50:53,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:50:53,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:50:53,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:50:53,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:50:53,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:50:53,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:50:53,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:50:53,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:50:53,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:50:53,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:50:53,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:50:53,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:50:53,632 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:50:53,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:50:53,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:50:53,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:50:53,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:50:53,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:50:53,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:50:53,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:50:53,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:50:53,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:50:53,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:50:53,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:50:53,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:50:53,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:50:53,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:50:53,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:50:53,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:50:53,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:50:53,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:50:53,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:50:53,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:50:53,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:50:53,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:50:53,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:50:53,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:50:53,730 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:50:53,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:50:53,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:50:53,732 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:50:53,732 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:50:53,732 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:50:53,733 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:50:53,733 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:50:53,733 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:50:53,733 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:50:53,734 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:50:53,734 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:50:53,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:50:53,735 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:50:53,735 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:50:53,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:50:53,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:50:53,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:50:53,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:50:53,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:50:53,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:50:53,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:50:53,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:50:53,739 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:50:53,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:50:53,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:50:53,740 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:50:53,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:50:53,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:50:53,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:50:53,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:50:53,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:50:53,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:50:53,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:50:53,742 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:50:53,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:50:53,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:50:53,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:50:53,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:50:53,744 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd9f812dd0592e9d2894b2831060b27794691dcfdafe5c5494c28350656b71ee [2021-10-20 05:50:54,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:50:54,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:50:54,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:50:54,122 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:50:54,123 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:50:54,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/forester-heap/dll-01-1.i [2021-10-20 05:50:54,252 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/data/22242b8a1/07cfb299258b4704a9384ec893d497d4/FLAGfb6a9af64 [2021-10-20 05:50:54,962 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:50:54,962 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i [2021-10-20 05:50:54,994 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/data/22242b8a1/07cfb299258b4704a9384ec893d497d4/FLAGfb6a9af64 [2021-10-20 05:50:55,197 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/data/22242b8a1/07cfb299258b4704a9384ec893d497d4 [2021-10-20 05:50:55,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:50:55,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:50:55,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:50:55,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:50:55,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:50:55,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:55,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3345f98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55, skipping insertion in model container [2021-10-20 05:50:55,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:55,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:50:55,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:50:55,781 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[22080,22093] [2021-10-20 05:50:55,803 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[22353,22366] [2021-10-20 05:50:55,806 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[22587,22600] [2021-10-20 05:50:55,807 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[22657,22670] [2021-10-20 05:50:55,811 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[22924,22937] [2021-10-20 05:50:55,812 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23032,23045] [2021-10-20 05:50:55,815 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23263,23276] [2021-10-20 05:50:55,816 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23343,23356] [2021-10-20 05:50:55,817 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23422,23435] [2021-10-20 05:50:55,818 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23512,23525] [2021-10-20 05:50:55,821 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23690,23703] [2021-10-20 05:50:55,822 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23768,23781] [2021-10-20 05:50:55,823 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23845,23858] [2021-10-20 05:50:55,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:50:55,839 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:50:55,893 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[22080,22093] [2021-10-20 05:50:55,897 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[22353,22366] [2021-10-20 05:50:55,900 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[22587,22600] [2021-10-20 05:50:55,901 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[22657,22670] [2021-10-20 05:50:55,904 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[22924,22937] [2021-10-20 05:50:55,905 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23032,23045] [2021-10-20 05:50:55,907 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23263,23276] [2021-10-20 05:50:55,908 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23343,23356] [2021-10-20 05:50:55,909 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23422,23435] [2021-10-20 05:50:55,911 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23512,23525] [2021-10-20 05:50:55,912 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23690,23703] [2021-10-20 05:50:55,913 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23768,23781] [2021-10-20 05:50:55,914 WARN L228 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_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/sv-benchmarks/c/forester-heap/dll-01-1.i[23845,23858] [2021-10-20 05:50:55,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:50:55,949 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:50:55,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55 WrapperNode [2021-10-20 05:50:55,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:50:55,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:50:55,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:50:55,952 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:50:55,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:55,977 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:56,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:50:56,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:50:56,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:50:56,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:50:56,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:56,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:56,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:56,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:56,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:56,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:56,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:56,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:50:56,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:50:56,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:50:56,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:50:56,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (1/1) ... [2021-10-20 05:50:56,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:50:56,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:50:56,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:50:56,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:50:56,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-20 05:50:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-20 05:50:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:50:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-20 05:50:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 05:50:56,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:50:56,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:50:56,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:50:57,337 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:50:57,338 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-10-20 05:50:57,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:50:57 BoogieIcfgContainer [2021-10-20 05:50:57,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:50:57,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:50:57,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:50:57,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:50:57,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:50:55" (1/3) ... [2021-10-20 05:50:57,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e1a4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:50:57, skipping insertion in model container [2021-10-20 05:50:57,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:50:55" (2/3) ... [2021-10-20 05:50:57,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e1a4cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:50:57, skipping insertion in model container [2021-10-20 05:50:57,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:50:57" (3/3) ... [2021-10-20 05:50:57,362 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2021-10-20 05:50:57,369 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:50:57,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-10-20 05:50:57,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:50:57,441 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 05:50:57,442 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-10-20 05:50:57,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 60 states have (on average 1.9666666666666666) internal successors, (118), 73 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:57,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-20 05:50:57,469 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:50:57,470 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-20 05:50:57,471 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-20 05:50:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:50:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash 346217, now seen corresponding path program 1 times [2021-10-20 05:50:57,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:50:57,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293422994] [2021-10-20 05:50:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:50:57,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:50:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:50:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:50:57,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:50:57,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293422994] [2021-10-20 05:50:57,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293422994] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:50:57,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:50:57,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 05:50:57,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447624866] [2021-10-20 05:50:57,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:50:57,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:50:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:50:57,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:50:57,734 INFO L87 Difference]: Start difference. First operand has 74 states, 60 states have (on average 1.9666666666666666) internal successors, (118), 73 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:50:57,814 INFO L93 Difference]: Finished difference Result 163 states and 262 transitions. [2021-10-20 05:50:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:50:57,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-20 05:50:57,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:50:57,829 INFO L225 Difference]: With dead ends: 163 [2021-10-20 05:50:57,829 INFO L226 Difference]: Without dead ends: 89 [2021-10-20 05:50:57,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:50:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-20 05:50:57,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-10-20 05:50:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.271186440677966) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-10-20 05:50:57,883 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 3 [2021-10-20 05:50:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:50:57,883 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-10-20 05:50:57,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-10-20 05:50:57,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-20 05:50:57,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:50:57,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:50:57,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:50:57,886 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-20 05:50:57,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:50:57,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2042324601, now seen corresponding path program 1 times [2021-10-20 05:50:57,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:50:57,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855510263] [2021-10-20 05:50:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:50:57,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:50:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:50:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:50:57,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:50:57,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855510263] [2021-10-20 05:50:57,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855510263] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:50:57,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:50:57,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:50:57,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775943724] [2021-10-20 05:50:57,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:50:57,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:50:57,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:50:57,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:50:57,992 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:58,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:50:58,006 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-10-20 05:50:58,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:50:58,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-20 05:50:58,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:50:58,009 INFO L225 Difference]: With dead ends: 71 [2021-10-20 05:50:58,009 INFO L226 Difference]: Without dead ends: 69 [2021-10-20 05:50:58,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:50:58,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-20 05:50:58,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-20 05:50:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-10-20 05:50:58,020 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 7 [2021-10-20 05:50:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:50:58,020 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-10-20 05:50:58,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-10-20 05:50:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-20 05:50:58,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:50:58,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:50:58,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:50:58,023 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-20 05:50:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:50:58,023 INFO L82 PathProgramCache]: Analyzing trace with hash 577845022, now seen corresponding path program 1 times [2021-10-20 05:50:58,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:50:58,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462360466] [2021-10-20 05:50:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:50:58,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:50:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:50:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:50:58,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:50:58,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462360466] [2021-10-20 05:50:58,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462360466] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:50:58,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:50:58,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 05:50:58,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946249535] [2021-10-20 05:50:58,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 05:50:58,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:50:58,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 05:50:58,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:50:58,207 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:50:58,522 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2021-10-20 05:50:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 05:50:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-20 05:50:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:50:58,525 INFO L225 Difference]: With dead ends: 112 [2021-10-20 05:50:58,525 INFO L226 Difference]: Without dead ends: 108 [2021-10-20 05:50:58,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-20 05:50:58,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-20 05:50:58,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 65. [2021-10-20 05:50:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-10-20 05:50:58,548 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 12 [2021-10-20 05:50:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:50:58,549 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-10-20 05:50:58,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-10-20 05:50:58,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-20 05:50:58,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:50:58,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:50:58,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 05:50:58,552 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-20 05:50:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:50:58,555 INFO L82 PathProgramCache]: Analyzing trace with hash 733330698, now seen corresponding path program 1 times [2021-10-20 05:50:58,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:50:58,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518400729] [2021-10-20 05:50:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:50:58,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:50:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:50:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:50:58,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:50:58,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518400729] [2021-10-20 05:50:58,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518400729] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:50:58,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:50:58,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:50:58,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907730908] [2021-10-20 05:50:58,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:50:58,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:50:58,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:50:58,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:50:58,679 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-10-20 05:50:58,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:50:58,810 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2021-10-20 05:50:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 05:50:58,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-20 05:50:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:50:58,815 INFO L225 Difference]: With dead ends: 123 [2021-10-20 05:50:58,815 INFO L226 Difference]: Without dead ends: 103 [2021-10-20 05:50:58,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:50:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-20 05:50:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2021-10-20 05:50:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-10-20 05:50:58,839 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 13 [2021-10-20 05:50:58,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:50:58,839 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-10-20 05:50:58,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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) [2021-10-20 05:50:58,840 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-10-20 05:50:58,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-20 05:50:58,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:50:58,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:50:58,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 05:50:58,841 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-20 05:50:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:50:58,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1197531257, now seen corresponding path program 1 times [2021-10-20 05:50:58,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:50:58,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236923294] [2021-10-20 05:50:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:50:58,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:50:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:50:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:50:58,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:50:58,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236923294] [2021-10-20 05:50:58,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236923294] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:50:58,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:50:58,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:50:58,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715354589] [2021-10-20 05:50:58,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:50:58,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:50:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:50:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:50:58,948 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:58,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:50:58,970 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2021-10-20 05:50:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:50:58,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-20 05:50:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:50:58,977 INFO L225 Difference]: With dead ends: 64 [2021-10-20 05:50:58,977 INFO L226 Difference]: Without dead ends: 62 [2021-10-20 05:50:58,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:50:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-20 05:50:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-20 05:50:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.2) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-10-20 05:50:58,995 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 17 [2021-10-20 05:50:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:50:58,996 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-10-20 05:50:58,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-10-20 05:50:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-20 05:50:58,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:50:58,997 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:50:58,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 05:50:58,998 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-20 05:50:58,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:50:58,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1197538082, now seen corresponding path program 1 times [2021-10-20 05:50:58,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:50:58,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160490979] [2021-10-20 05:50:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:50:59,000 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:50:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:50:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:50:59,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:50:59,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160490979] [2021-10-20 05:50:59,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160490979] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:50:59,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:50:59,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:50:59,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757027488] [2021-10-20 05:50:59,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:50:59,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:50:59,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:50:59,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:50:59,083 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:50:59,104 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2021-10-20 05:50:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:50:59,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-20 05:50:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:50:59,106 INFO L225 Difference]: With dead ends: 87 [2021-10-20 05:50:59,107 INFO L226 Difference]: Without dead ends: 85 [2021-10-20 05:50:59,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:50:59,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-20 05:50:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 64. [2021-10-20 05:50:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 63 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-10-20 05:50:59,127 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 17 [2021-10-20 05:50:59,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:50:59,127 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-10-20 05:50:59,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-10-20 05:50:59,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 05:50:59,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:50:59,129 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:50:59,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-20 05:50:59,129 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-20 05:50:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:50:59,130 INFO L82 PathProgramCache]: Analyzing trace with hash 584392100, now seen corresponding path program 1 times [2021-10-20 05:50:59,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:50:59,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503886318] [2021-10-20 05:50:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:50:59,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:50:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:50:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:50:59,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:50:59,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503886318] [2021-10-20 05:50:59,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503886318] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:50:59,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:50:59,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:50:59,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655923468] [2021-10-20 05:50:59,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:50:59,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:50:59,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:50:59,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:50:59,240 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-10-20 05:50:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:50:59,253 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2021-10-20 05:50:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:50:59,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-20 05:50:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:50:59,255 INFO L225 Difference]: With dead ends: 64 [2021-10-20 05:50:59,255 INFO L226 Difference]: Without dead ends: 62 [2021-10-20 05:50:59,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:50:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-20 05:50:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-20 05:50:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 61 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:50:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-10-20 05:50:59,268 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 18 [2021-10-20 05:50:59,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:50:59,269 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-10-20 05:50:59,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-10-20 05:50:59,270 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-10-20 05:50:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-20 05:50:59,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:50:59,271 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:50:59,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-20 05:50:59,272 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-20 05:50:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:50:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1651222344, now seen corresponding path program 1 times [2021-10-20 05:50:59,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:50:59,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052766349] [2021-10-20 05:50:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:50:59,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:50:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:50:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:50:59,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:50:59,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052766349] [2021-10-20 05:50:59,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052766349] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:50:59,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:50:59,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-20 05:50:59,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022057772] [2021-10-20 05:50:59,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-20 05:50:59,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:50:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-20 05:50:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-20 05:50:59,691 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:51:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:51:00,486 INFO L93 Difference]: Finished difference Result 148 states and 161 transitions. [2021-10-20 05:51:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-20 05:51:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2021-10-20 05:51:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:51:00,490 INFO L225 Difference]: With dead ends: 148 [2021-10-20 05:51:00,490 INFO L226 Difference]: Without dead ends: 146 [2021-10-20 05:51:00,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-10-20 05:51:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-20 05:51:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 79. [2021-10-20 05:51:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 78 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:51:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-10-20 05:51:00,501 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 20 [2021-10-20 05:51:00,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:51:00,502 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-10-20 05:51:00,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:51:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-10-20 05:51:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-20 05:51:00,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:51:00,504 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:51:00,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-20 05:51:00,505 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2021-10-20 05:51:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:51:00,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1300296775, now seen corresponding path program 1 times [2021-10-20 05:51:00,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:51:00,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131013089] [2021-10-20 05:51:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:51:00,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:51:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:51:00,542 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 05:51:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:51:00,678 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-20 05:51:00,678 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 05:51:00,680 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,682 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,683 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,683 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,683 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,688 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,688 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:51:00,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-20 05:51:00,697 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:51:00,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:51:00 BoogieIcfgContainer [2021-10-20 05:51:00,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:51:00,757 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:51:00,757 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:51:00,757 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:51:00,758 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:50:57" (3/4) ... [2021-10-20 05:51:00,760 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-20 05:51:00,810 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:51:00,810 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:51:00,812 INFO L168 Benchmark]: Toolchain (without parser) took 5603.67 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 58.1 MB in the beginning and 42.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 48.5 MB. Max. memory is 16.1 GB. [2021-10-20 05:51:00,812 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory is still 48.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:51:00,813 INFO L168 Benchmark]: CACSL2BoogieTranslator took 738.13 ms. Allocated memory is still 92.3 MB. Free memory was 57.9 MB in the beginning and 59.6 MB in the end (delta: -1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:51:00,814 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.35 ms. Allocated memory is still 92.3 MB. Free memory was 59.6 MB in the beginning and 57.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:51:00,814 INFO L168 Benchmark]: Boogie Preprocessor took 70.45 ms. Allocated memory is still 92.3 MB. Free memory was 57.2 MB in the beginning and 55.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:51:00,815 INFO L168 Benchmark]: RCFGBuilder took 1253.70 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 55.1 MB in the beginning and 95.2 MB in the end (delta: -40.0 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:51:00,816 INFO L168 Benchmark]: TraceAbstraction took 3410.04 ms. Allocated memory is still 125.8 MB. Free memory was 94.5 MB in the beginning and 45.8 MB in the end (delta: 48.8 MB). Peak memory consumption was 47.3 MB. Max. memory is 16.1 GB. [2021-10-20 05:51:00,816 INFO L168 Benchmark]: Witness Printer took 53.33 ms. Allocated memory is still 125.8 MB. Free memory was 45.8 MB in the beginning and 42.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:51:00,819 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory is still 48.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 738.13 ms. Allocated memory is still 92.3 MB. Free memory was 57.9 MB in the beginning and 59.6 MB in the end (delta: -1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.35 ms. Allocated memory is still 92.3 MB. Free memory was 59.6 MB in the beginning and 57.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.45 ms. Allocated memory is still 92.3 MB. Free memory was 57.2 MB in the beginning and 55.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1253.70 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 55.1 MB in the beginning and 95.2 MB in the end (delta: -40.0 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3410.04 ms. Allocated memory is still 125.8 MB. Free memory was 94.5 MB in the beginning and 45.8 MB in the end (delta: 48.8 MB). Peak memory consumption was 47.3 MB. Max. memory is 16.1 GB. * Witness Printer took 53.33 ms. Allocated memory is still 125.8 MB. Free memory was 45.8 MB in the beginning and 42.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1040]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1003] SLL* list = malloc(sizeof(SLL)); [L1004] list->next = ((void*)0) [L1005] list->prev = ((void*)0) [L1006] COND FALSE !(!(list != ((void*)0))) [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1006] list->inner = malloc(sizeof(SLL)) [L1006] EXPR list->inner [L1006] list->inner->next = ((void*)0) [L1006] EXPR list->inner [L1006] list->inner->inner = ((void*)0) [L1006] EXPR list->inner [L1006] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) [L1006] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1008] SLL* end = list; [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1022] end = ((void*)0) [L1023] end = list [L1026] COND FALSE !(!(((void*)0) != end)) [L1028] COND TRUE ((void*)0) != end [L1030] int len = 0; [L1031] EXPR end->inner [L1031] SLL* inner = end->inner; [L1032] COND TRUE ((void*)0) != inner [L1034] COND TRUE len == 0 [L1035] len = 1 [L1038] COND FALSE !(!(((void*)0) != inner)) [L1039] EXPR inner->inner [L1039] COND FALSE !(!(((void*)0) == inner->inner)) [L1040] EXPR inner->next [L1040] COND TRUE !(((void*)0) != inner->next) [L1040] reach_error() - UnprovableResult [Line: 1006]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1006]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1026]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1055]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1056]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1057]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 74 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 3264.3ms, OverallIterations: 9, TraceHistogramMax: 1, EmptinessCheckTime: 20.0ms, AutomataDifference: 1474.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 474 SDtfs, 614 SDslu, 575 SDs, 0 SdLazy, 241 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 639.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 606.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=8, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 142.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 188 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 49.2ms SsaConstructionTime, 406.4ms SatisfiabilityAnalysisTime, 737.8ms InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-20 05:51:00,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a35cdd2e-59fd-4d50-a9ad-64806fcd657f/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...