./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-reverse.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_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE --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 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE --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 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:08:52,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:08:52,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:08:52,955 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:08:52,956 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:08:52,957 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:08:52,959 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:08:52,961 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:08:52,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:08:52,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:08:52,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:08:52,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:08:52,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:08:52,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:08:52,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:08:52,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:08:52,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:08:52,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:08:52,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:08:52,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:08:52,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:08:52,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:08:52,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:08:52,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:08:52,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:08:52,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:08:52,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:08:52,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:08:52,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:08:52,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:08:52,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:08:52,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:08:52,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:08:52,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:08:52,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:08:52,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:08:52,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:08:52,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:08:53,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:08:53,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:08:53,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:08:53,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:08:53,045 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:08:53,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:08:53,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:08:53,047 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:08:53,047 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:08:53,047 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:08:53,047 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:08:53,047 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:08:53,047 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:08:53,048 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:08:53,054 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:08:53,055 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:08:53,055 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:08:53,055 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:08:53,055 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:08:53,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:08:53,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:08:53,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:08:53,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:08:53,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:08:53,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:08:53,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:08:53,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:08:53,063 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:08:53,063 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:08:53,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:08:53,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:08:53,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:08:53,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:08:53,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:08:53,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:08:53,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:08:53,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:08:53,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:08:53,069 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:08:53,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:08:53,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:08:53,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:08:53,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:08:53,069 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 [2021-10-24 11:08:53,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:08:53,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:08:53,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:08:53,379 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:08:53,380 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:08:53,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-24 11:08:53,440 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/data/3dffd922c/ea00fc7009824df4b39519abbac2d48f/FLAG50ecba351 [2021-10-24 11:08:53,969 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:08:53,969 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-24 11:08:53,981 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/data/3dffd922c/ea00fc7009824df4b39519abbac2d48f/FLAG50ecba351 [2021-10-24 11:08:54,415 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/data/3dffd922c/ea00fc7009824df4b39519abbac2d48f [2021-10-24 11:08:54,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:08:54,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:08:54,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:08:54,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:08:54,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:08:54,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d2e942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54, skipping insertion in model container [2021-10-24 11:08:54,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:08:54,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:08:54,751 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-24 11:08:54,755 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-24 11:08:54,761 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-24 11:08:54,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:08:54,773 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:08:54,821 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-24 11:08:54,823 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-24 11:08:54,836 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-24 11:08:54,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:08:54,880 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:08:54,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54 WrapperNode [2021-10-24 11:08:54,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:08:54,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:08:54,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:08:54,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:08:54,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:08:54,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:08:54,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:08:54,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:08:54,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:08:54,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:08:54,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:08:54,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:08:54,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (1/1) ... [2021-10-24 11:08:54,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:08:55,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:08:55,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:08:55,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:08:55,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 11:08:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-24 11:08:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 11:08:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 11:08:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:08:55,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 11:08:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 11:08:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 11:08:55,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:08:55,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:08:55,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:08:55,935 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-24 11:08:55,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:08:55 BoogieIcfgContainer [2021-10-24 11:08:55,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:08:55,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:08:55,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:08:55,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:08:55,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:08:54" (1/3) ... [2021-10-24 11:08:55,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45552c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:08:55, skipping insertion in model container [2021-10-24 11:08:55,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:08:54" (2/3) ... [2021-10-24 11:08:55,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45552c33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:08:55, skipping insertion in model container [2021-10-24 11:08:55,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:08:55" (3/3) ... [2021-10-24 11:08:55,946 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-10-24 11:08:55,951 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:08:55,951 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-24 11:08:56,017 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:08:56,022 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 [2021-10-24 11:08:56,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-24 11:08:56,037 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:56,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 11:08:56,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:08:56,042 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 11:08:56,043 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:08:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:08:56,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1014884411, now seen corresponding path program 1 times [2021-10-24 11:08:56,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:08:56,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588865418] [2021-10-24 11:08:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:08:56,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:08:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:08:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:08:56,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:08:56,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588865418] [2021-10-24 11:08:56,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588865418] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:08:56,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:08:56,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:08:56,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351310054] [2021-10-24 11:08:56,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 11:08:56,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:08:56,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 11:08:56,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:08:56,310 INFO L87 Difference]: Start difference. First operand has 25 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:08:56,327 INFO L93 Difference]: Finished difference Result 47 states and 75 transitions. [2021-10-24 11:08:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 11:08:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-24 11:08:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:08:56,336 INFO L225 Difference]: With dead ends: 47 [2021-10-24 11:08:56,336 INFO L226 Difference]: Without dead ends: 23 [2021-10-24 11:08:56,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:08:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-24 11:08:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-24 11:08:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-24 11:08:56,370 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2021-10-24 11:08:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:08:56,371 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-24 11:08:56,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-24 11:08:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 11:08:56,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:08:56,373 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:08:56,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 11:08:56,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:08:56,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:08:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1773969138, now seen corresponding path program 1 times [2021-10-24 11:08:56,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:08:56,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307826202] [2021-10-24 11:08:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:08:56,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:08:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:08:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:08:56,554 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:08:56,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307826202] [2021-10-24 11:08:56,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307826202] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:08:56,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:08:56,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 11:08:56,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23239026] [2021-10-24 11:08:56,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:08:56,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:08:56,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:08:56,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:08:56,561 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:08:57,160 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-10-24 11:08:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:08:57,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 11:08:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:08:57,163 INFO L225 Difference]: With dead ends: 52 [2021-10-24 11:08:57,164 INFO L226 Difference]: Without dead ends: 33 [2021-10-24 11:08:57,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:08:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-24 11:08:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-24 11:08:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.28) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-24 11:08:57,175 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2021-10-24 11:08:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:08:57,177 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-24 11:08:57,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:57,180 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-24 11:08:57,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 11:08:57,181 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:08:57,181 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:08:57,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 11:08:57,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:08:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:08:57,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1773970388, now seen corresponding path program 1 times [2021-10-24 11:08:57,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:08:57,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790658915] [2021-10-24 11:08:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:08:57,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:08:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:08:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:08:57,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:08:57,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790658915] [2021-10-24 11:08:57,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790658915] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:08:57,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:08:57,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 11:08:57,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542467443] [2021-10-24 11:08:57,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:08:57,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:08:57,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:08:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:08:57,258 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:57,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:08:57,530 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-10-24 11:08:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:08:57,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 11:08:57,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:08:57,533 INFO L225 Difference]: With dead ends: 47 [2021-10-24 11:08:57,534 INFO L226 Difference]: Without dead ends: 37 [2021-10-24 11:08:57,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:08:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-24 11:08:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-10-24 11:08:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-10-24 11:08:57,549 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 8 [2021-10-24 11:08:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:08:57,549 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-10-24 11:08:57,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-10-24 11:08:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 11:08:57,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:08:57,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:08:57,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 11:08:57,551 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:08:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:08:57,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1654140644, now seen corresponding path program 1 times [2021-10-24 11:08:57,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:08:57,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15127066] [2021-10-24 11:08:57,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:08:57,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:08:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:08:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:08:57,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:08:57,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15127066] [2021-10-24 11:08:57,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15127066] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 11:08:57,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017602486] [2021-10-24 11:08:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:08:57,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:08:57,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:08:57,795 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:08:57,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 11:08:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:08:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-24 11:08:57,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:08:57,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:57,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:57,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 11:08:57,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:57,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:57,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:08:57,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 11:08:58,072 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-10-24 11:08:58,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-10-24 11:08:59,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:00,559 INFO L354 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2021-10-24 11:09:00,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 583 treesize of output 578 [2021-10-24 11:09:00,593 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:00,598 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 659 [2021-10-24 11:09:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:00,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:00,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 621 treesize of output 548 [2021-10-24 11:09:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:00,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:00,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:00,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 498 treesize of output 499 [2021-10-24 11:09:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:00,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:01,071 INFO L354 Elim1Store]: treesize reduction 150, result has 14.8 percent of original size [2021-10-24 11:09:01,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 605 treesize of output 576 [2021-10-24 11:09:01,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-24 11:09:01,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [578354413] [2021-10-24 11:09:01,143 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-10-24 11:09:01,144 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 11:09:01,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 11:09:01,153 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 11:09:01,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 11:09:01,182 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,184 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,184 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-24 11:09:01,186 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,186 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,187 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,188 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 11:09:01,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-24 11:09:01,190 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,191 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,191 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-24 11:09:01,197 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-24 11:09:01,197 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,197 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,198 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 11:09:01,200 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 11:09:01,200 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,201 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,206 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-10-24 11:09:01,207 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,208 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-10-24 11:09:01,208 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,209 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,209 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-10-24 11:09:01,209 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 11:09:01,210 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:01,210 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 11:09:01,212 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 230 [2021-10-24 11:09:01,220 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f4bf9b2 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:571) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-24 11:09:01,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-24 11:09:01,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-24 11:09:01,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234341541] [2021-10-24 11:09:01,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:09:01,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:09:01,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:09:01,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:09:01,225 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 11:09:01,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:01,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:09:01,447 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f4bf9b2 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-24 11:09:01,451 INFO L168 Benchmark]: Toolchain (without parser) took 7032.04 ms. Allocated memory was 104.9 MB in the beginning and 159.4 MB in the end (delta: 54.5 MB). Free memory was 72.1 MB in the beginning and 48.3 MB in the end (delta: 23.8 MB). Peak memory consumption was 78.6 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:01,452 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 104.9 MB. Free memory is still 62.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:09:01,452 INFO L168 Benchmark]: CACSL2BoogieTranslator took 460.37 ms. Allocated memory was 104.9 MB in the beginning and 132.1 MB in the end (delta: 27.3 MB). Free memory was 71.8 MB in the beginning and 98.8 MB in the end (delta: -27.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:01,453 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.29 ms. Allocated memory is still 132.1 MB. Free memory was 98.8 MB in the beginning and 96.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:01,453 INFO L168 Benchmark]: Boogie Preprocessor took 54.77 ms. Allocated memory is still 132.1 MB. Free memory was 96.7 MB in the beginning and 95.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:01,454 INFO L168 Benchmark]: RCFGBuilder took 951.78 ms. Allocated memory is still 132.1 MB. Free memory was 95.1 MB in the beginning and 68.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:01,454 INFO L168 Benchmark]: TraceAbstraction took 5511.20 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 67.9 MB in the beginning and 48.3 MB in the end (delta: 19.6 MB). Peak memory consumption was 50.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:09:01,457 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 104.9 MB. Free memory is still 62.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 460.37 ms. Allocated memory was 104.9 MB in the beginning and 132.1 MB in the end (delta: 27.3 MB). Free memory was 71.8 MB in the beginning and 98.8 MB in the end (delta: -27.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.29 ms. Allocated memory is still 132.1 MB. Free memory was 98.8 MB in the beginning and 96.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.77 ms. Allocated memory is still 132.1 MB. Free memory was 96.7 MB in the beginning and 95.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 951.78 ms. Allocated memory is still 132.1 MB. Free memory was 95.1 MB in the beginning and 68.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5511.20 ms. Allocated memory was 132.1 MB in the beginning and 159.4 MB in the end (delta: 27.3 MB). Free memory was 67.9 MB in the beginning and 48.3 MB in the end (delta: 19.6 MB). Peak memory consumption was 50.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f4bf9b2 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2f4bf9b2: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-24 11:09:01,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:09:03,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:09:03,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:09:03,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:09:03,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:09:03,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:09:03,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:09:03,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:09:03,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:09:03,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:09:03,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:09:03,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:09:03,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:09:03,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:09:03,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:09:03,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:09:03,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:09:03,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:09:03,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:09:03,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:09:03,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:09:03,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:09:03,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:09:03,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:09:03,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:09:03,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:09:03,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:09:03,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:09:03,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:09:03,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:09:03,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:09:03,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:09:03,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:09:03,948 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:09:03,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:09:03,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:09:03,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:09:03,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:09:03,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:09:03,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:09:03,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:09:03,953 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 11:09:03,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:09:03,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:09:03,981 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:09:03,981 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:09:03,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:09:03,982 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:09:03,982 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:09:03,982 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:09:03,983 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:09:03,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:09:03,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:09:03,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:09:03,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:09:03,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:09:03,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:09:03,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:09:03,985 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:09:03,985 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 11:09:03,985 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 11:09:03,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:09:03,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:09:03,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:09:03,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:09:03,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:09:03,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 11:09:03,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:09:03,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:09:03,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:09:03,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:09:03,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:09:03,996 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 11:09:03,996 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 11:09:03,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:09:03,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:09:03,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:09:03,997 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52fc70d7844651686a4c27e057f507f0498e7d5f7c17f07a035699d1630f6ea2 [2021-10-24 11:09:04,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:09:04,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:09:04,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:09:04,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:09:04,420 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:09:04,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-24 11:09:04,494 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/data/eea340a3e/e0edd438892249f6b9b7486b16bfda6b/FLAG755722e9a [2021-10-24 11:09:05,154 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:09:05,155 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i [2021-10-24 11:09:05,173 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/data/eea340a3e/e0edd438892249f6b9b7486b16bfda6b/FLAG755722e9a [2021-10-24 11:09:05,459 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/data/eea340a3e/e0edd438892249f6b9b7486b16bfda6b [2021-10-24 11:09:05,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:09:05,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:09:05,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:05,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:09:05,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:09:05,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:05" (1/1) ... [2021-10-24 11:09:05,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ebeec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:05, skipping insertion in model container [2021-10-24 11:09:05,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:09:05" (1/1) ... [2021-10-24 11:09:05,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:09:05,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:09:05,868 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-24 11:09:05,873 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-24 11:09:05,888 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-24 11:09:05,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:05,920 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:09:05,986 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22309,22322] [2021-10-24 11:09:05,998 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22394,22407] [2021-10-24 11:09:06,005 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_116059b2-e9ca-4995-ab06-e9ef06f20e80/sv-benchmarks/c/forester-heap/dll-reverse.i[22924,22937] [2021-10-24 11:09:06,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:09:06,056 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:09:06,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06 WrapperNode [2021-10-24 11:09:06,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:09:06,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:09:06,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:09:06,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:09:06,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (1/1) ... [2021-10-24 11:09:06,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (1/1) ... [2021-10-24 11:09:06,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:09:06,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:09:06,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:09:06,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:09:06,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (1/1) ... [2021-10-24 11:09:06,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (1/1) ... [2021-10-24 11:09:06,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (1/1) ... [2021-10-24 11:09:06,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (1/1) ... [2021-10-24 11:09:06,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (1/1) ... [2021-10-24 11:09:06,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (1/1) ... [2021-10-24 11:09:06,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (1/1) ... [2021-10-24 11:09:06,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:09:06,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:09:06,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:09:06,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:09:06,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (1/1) ... [2021-10-24 11:09:06,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:09:06,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:09:06,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:09:06,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:09:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 11:09:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 11:09:06,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 11:09:06,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:09:06,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 11:09:06,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 11:09:06,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 11:09:06,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 11:09:06,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:09:06,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:09:07,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:09:07,030 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-24 11:09:07,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:07 BoogieIcfgContainer [2021-10-24 11:09:07,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:09:07,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:09:07,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:09:07,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:09:07,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:09:05" (1/3) ... [2021-10-24 11:09:07,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af4d661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:09:07, skipping insertion in model container [2021-10-24 11:09:07,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:09:06" (2/3) ... [2021-10-24 11:09:07,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af4d661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:09:07, skipping insertion in model container [2021-10-24 11:09:07,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:07" (3/3) ... [2021-10-24 11:09:07,044 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-reverse.i [2021-10-24 11:09:07,049 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:09:07,049 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-24 11:09:07,109 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:09:07,115 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 [2021-10-24 11:09:07,115 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-24 11:09:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 11:09:07,132 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:07,133 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:07,133 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:07,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1808873062, now seen corresponding path program 1 times [2021-10-24 11:09:07,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:07,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69968601] [2021-10-24 11:09:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:07,151 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:07,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:07,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:07,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 11:09:07,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-24 11:09:07,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:07,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:07,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:07,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69968601] [2021-10-24 11:09:07,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69968601] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:07,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:07,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-24 11:09:07,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565371652] [2021-10-24 11:09:07,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 11:09:07,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:09:07,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 11:09:07,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:09:07,381 INFO L87 Difference]: Start difference. First operand has 35 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-24 11:09:07,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:07,401 INFO L93 Difference]: Finished difference Result 67 states and 107 transitions. [2021-10-24 11:09:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 11:09:07,403 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2021-10-24 11:09:07,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:07,410 INFO L225 Difference]: With dead ends: 67 [2021-10-24 11:09:07,410 INFO L226 Difference]: Without dead ends: 29 [2021-10-24 11:09:07,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:09:07,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-24 11:09:07,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-24 11:09:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-10-24 11:09:07,444 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2021-10-24 11:09:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:07,444 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-10-24 11:09:07,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2021-10-24 11:09:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-10-24 11:09:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 11:09:07,445 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:07,445 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:07,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-24 11:09:07,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:09:07,658 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:07,659 INFO L82 PathProgramCache]: Analyzing trace with hash 239687661, now seen corresponding path program 1 times [2021-10-24 11:09:07,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:07,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834659205] [2021-10-24 11:09:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:07,660 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:07,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:07,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:07,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 11:09:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:07,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:09:07,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:07,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:07,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:07,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834659205] [2021-10-24 11:09:07,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834659205] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:09:07,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:09:07,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 11:09:07,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217462936] [2021-10-24 11:09:07,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:09:07,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:09:07,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:09:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:09:07,929 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:08,206 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-10-24 11:09:08,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:09:08,207 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 11:09:08,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:08,208 INFO L225 Difference]: With dead ends: 54 [2021-10-24 11:09:08,209 INFO L226 Difference]: Without dead ends: 40 [2021-10-24 11:09:08,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:09:08,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-24 11:09:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-10-24 11:09:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-10-24 11:09:08,216 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 8 [2021-10-24 11:09:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:08,216 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-10-24 11:09:08,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-10-24 11:09:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 11:09:08,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:08,218 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:08,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:08,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:09:08,430 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1200905122, now seen corresponding path program 1 times [2021-10-24 11:09:08,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:08,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311997747] [2021-10-24 11:09:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:08,433 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:08,434 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:08,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 11:09:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:08,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 11:09:08,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:08,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-24 11:09:08,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-24 11:09:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:08,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:08,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:08,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311997747] [2021-10-24 11:09:08,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311997747] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:09:08,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [109605644] [2021-10-24 11:09:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:08,898 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:09:08,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:09:08,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:09:08,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-24 11:09:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:09,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 11:09:09,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:09,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-24 11:09:09,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-24 11:09:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:09,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:09,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [109605644] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:09:09,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334488358] [2021-10-24 11:09:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:09,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:09:09,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:09:09,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:09:09,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-24 11:09:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:09,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 11:09:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:09,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-24 11:09:09,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-24 11:09:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:09,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:09,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334488358] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:09:09,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 11:09:09,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2021-10-24 11:09:09,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766615746] [2021-10-24 11:09:09,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:09:09,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:09:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:09:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:09:09,600 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:10,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:09:10,304 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-10-24 11:09:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:09:10,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-24 11:09:10,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:09:10,305 INFO L225 Difference]: With dead ends: 35 [2021-10-24 11:09:10,306 INFO L226 Difference]: Without dead ends: 31 [2021-10-24 11:09:10,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:09:10,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-24 11:09:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-24 11:09:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-10-24 11:09:10,310 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 13 [2021-10-24 11:09:10,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:09:10,311 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-10-24 11:09:10,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:09:10,311 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-10-24 11:09:10,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-24 11:09:10,312 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:09:10,312 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:09:10,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:10,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-24 11:09:10,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-24 11:09:10,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 11:09:10,921 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:09:10,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:09:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash 825424614, now seen corresponding path program 1 times [2021-10-24 11:09:10,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:09:10,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059304563] [2021-10-24 11:09:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:10,923 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:09:10,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:09:10,924 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:09:10,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 11:09:11,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:11,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:09:11,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:11,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 11:09:16,189 INFO L354 Elim1Store]: treesize reduction 328, result has 15.7 percent of original size [2021-10-24 11:09:16,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 151 treesize of output 136 [2021-10-24 11:09:16,245 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-24 11:09:16,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 169 [2021-10-24 11:09:20,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:20,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:09:20,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 50 [2021-10-24 11:09:21,929 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-24 11:09:21,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-10-24 11:09:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:21,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:25,084 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-10-24 11:09:25,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 150 treesize of output 189 [2021-10-24 11:09:28,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:09:28,257 INFO L354 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2021-10-24 11:09:28,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 97 [2021-10-24 11:09:28,971 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-24 11:09:28,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 52 [2021-10-24 11:09:30,471 INFO L354 Elim1Store]: treesize reduction 96, result has 70.9 percent of original size [2021-10-24 11:09:30,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 304 treesize of output 431 [2021-10-24 11:09:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:50,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:09:50,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059304563] [2021-10-24 11:09:50,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059304563] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:09:50,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [765872662] [2021-10-24 11:09:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:09:50,025 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:09:50,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:09:50,038 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:09:50,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-24 11:09:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:09:50,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 11:09:50,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:09:50,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 11:09:50,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:09:50,600 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-24 11:09:50,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 52 [2021-10-24 11:09:50,615 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-24 11:09:50,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2021-10-24 11:09:50,829 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-24 11:09:50,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-10-24 11:09:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:09:50,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:09:53,395 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-10-24 11:09:53,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 150 treesize of output 189 [2021-10-24 11:09:58,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:09:58,281 INFO L354 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2021-10-24 11:09:58,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 97 [2021-10-24 11:09:58,625 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-10-24 11:09:58,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 100 treesize of output 100 [2021-10-24 11:09:59,648 INFO L354 Elim1Store]: treesize reduction 58, result has 73.6 percent of original size [2021-10-24 11:09:59,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 175 treesize of output 286 [2021-10-24 11:10:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:05,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [765872662] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:05,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311799990] [2021-10-24 11:10:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:05,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:05,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:10:05,647 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:10:05,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-24 11:10:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:05,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:10:05,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:05,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 11:10:07,940 INFO L354 Elim1Store]: treesize reduction 333, result has 14.4 percent of original size [2021-10-24 11:10:07,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 128 [2021-10-24 11:10:07,954 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-24 11:10:07,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 161 treesize of output 161 [2021-10-24 11:10:08,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:09,170 INFO L354 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2021-10-24 11:10:09,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 35 [2021-10-24 11:10:09,309 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-24 11:10:09,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 38 [2021-10-24 11:10:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:09,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:11,781 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-10-24 11:10:11,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 151 treesize of output 190 [2021-10-24 11:10:18,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:10:18,633 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-10-24 11:10:18,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 53 [2021-10-24 11:10:18,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:10:18,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:10:18,820 INFO L354 Elim1Store]: treesize reduction 11, result has 76.1 percent of original size [2021-10-24 11:10:18,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 78 [2021-10-24 11:10:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:19,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:10:19,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:10:19,613 INFO L244 Elim1Store]: Index analysis took 607 ms [2021-10-24 11:10:19,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:19,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 48 [2021-10-24 11:10:21,230 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-24 11:10:21,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 31 [2021-10-24 11:10:21,295 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-24 11:10:21,365 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-24 11:10:21,374 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-24 11:10:21,430 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-24 11:10:21,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:10:21,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-10-24 11:10:21,488 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-24 11:10:21,495 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-24 11:10:22,369 INFO L354 Elim1Store]: treesize reduction 52, result has 81.0 percent of original size [2021-10-24 11:10:22,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 247 treesize of output 378 [2021-10-24 11:10:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:29,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311799990] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 11:10:29,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 11:10:29,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 15 [2021-10-24 11:10:29,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691260977] [2021-10-24 11:10:29,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-24 11:10:29,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:29,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-24 11:10:29,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-10-24 11:10:29,601 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:39,923 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2021-10-24 11:10:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-24 11:10:39,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-24 11:10:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:39,926 INFO L225 Difference]: With dead ends: 108 [2021-10-24 11:10:39,927 INFO L226 Difference]: Without dead ends: 98 [2021-10-24 11:10:39,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-10-24 11:10:39,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-24 11:10:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 43. [2021-10-24 11:10:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-10-24 11:10:39,937 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 18 [2021-10-24 11:10:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:39,937 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-10-24 11:10:39,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-10-24 11:10:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-24 11:10:39,939 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:39,939 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:10:39,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-24 11:10:40,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:40,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:40,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:10:40,546 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:10:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1505482984, now seen corresponding path program 1 times [2021-10-24 11:10:40,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:40,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459465238] [2021-10-24 11:10:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:10:40,547 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:40,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:40,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:40,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-24 11:10:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:10:40,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:10:40,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:40,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:40,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:40,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:40,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 11:10:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:40,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 11:10:41,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:41,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 64 [2021-10-24 11:10:41,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:41,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-10-24 11:10:41,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2021-10-24 11:10:41,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-10-24 11:10:41,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:41,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-10-24 11:10:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:41,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:41,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:41,118 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-24 11:10:41,120 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:41,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-24 11:10:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-24 11:10:41,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:10:41,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459465238] [2021-10-24 11:10:41,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459465238] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:10:41,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:10:41,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-24 11:10:41,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295882118] [2021-10-24 11:10:41,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:10:41,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:10:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:10:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:10:41,246 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:10:44,540 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2021-10-24 11:10:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:10:44,541 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-24 11:10:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:10:44,542 INFO L225 Difference]: With dead ends: 76 [2021-10-24 11:10:44,542 INFO L226 Difference]: Without dead ends: 63 [2021-10-24 11:10:44,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:10:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-24 11:10:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2021-10-24 11:10:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2021-10-24 11:10:44,550 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 18 [2021-10-24 11:10:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:10:44,550 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2021-10-24 11:10:44,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:10:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2021-10-24 11:10:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-24 11:10:44,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:10:44,551 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:10:44,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-24 11:10:44,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:10:44,752 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 11:10:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:10:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1413183039, now seen corresponding path program 2 times [2021-10-24 11:10:44,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:10:44,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771617099] [2021-10-24 11:10:44,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:10:44,753 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:10:44,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:10:44,754 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:10:44,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 11:10:45,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:10:45,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:10:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-24 11:10:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:10:45,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 11:10:45,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 11:10:45,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:45,603 INFO L354 Elim1Store]: treesize reduction 129, result has 19.4 percent of original size [2021-10-24 11:10:45,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 113 [2021-10-24 11:10:45,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:45,608 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-24 11:10:45,610 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:45,611 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 102 [2021-10-24 11:10:45,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:45,614 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-10-24 11:10:45,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:45,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:45,696 INFO L354 Elim1Store]: treesize reduction 237, result has 16.8 percent of original size [2021-10-24 11:10:45,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 114 [2021-10-24 11:10:45,706 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-24 11:10:45,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 93 [2021-10-24 11:10:45,710 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-24 11:10:45,969 INFO L354 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2021-10-24 11:10:45,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 86 [2021-10-24 11:10:45,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:45,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-10-24 11:10:45,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:45,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:45,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:46,005 INFO L354 Elim1Store]: treesize reduction 97, result has 8.5 percent of original size [2021-10-24 11:10:46,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 56 [2021-10-24 11:10:46,121 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-24 11:10:46,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 71 [2021-10-24 11:10:46,123 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:46,124 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 51 [2021-10-24 11:10:47,022 INFO L354 Elim1Store]: treesize reduction 187, result has 17.3 percent of original size [2021-10-24 11:10:47,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 53 [2021-10-24 11:10:47,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:10:47,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-10-24 11:10:47,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-10-24 11:10:47,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-10-24 11:10:47,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-24 11:10:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:10:47,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:10:47,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 68 [2021-10-24 11:10:47,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 88 [2021-10-24 11:10:47,265 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:47,267 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-24 11:10:47,269 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:47,271 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 130 [2021-10-24 11:10:53,511 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:53,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-10-24 11:10:53,513 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:10:53,513 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-24 11:10:55,533 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_82 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~x~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset v_DerPreprocessor_12) (bvadd (_ bv4 32) c_ULTIMATE.start_main_~x~0.offset) v_DerPreprocessor_11))) (.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~x~0.base) c_ULTIMATE.start_main_~x~0.offset))) (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_82 v_DerPreprocessor_10) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_82) v_DerPreprocessor_9))) c_ULTIMATE.start_main_~x~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~x~0.offset)) (_ bv1 32))) is different from false [2021-10-24 11:10:57,573 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_ULTIMATE.start_main_~x~0.offset_82 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_main_~head~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset v_DerPreprocessor_12) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv4 32)) v_DerPreprocessor_11))) (.cse1 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_main_~head~0.base) c_ULTIMATE.start_main_~head~0.offset))) (store .cse0 .cse1 (store (store (select .cse0 .cse1) v_ULTIMATE.start_main_~x~0.offset_82 v_DerPreprocessor_10) (bvadd (_ bv4 32) v_ULTIMATE.start_main_~x~0.offset_82) v_DerPreprocessor_9))) c_ULTIMATE.start_main_~head~0.base) (bvadd c_ULTIMATE.start_main_~head~0.offset (_ bv8 32))) (_ bv1 32))) is different from false [2021-10-24 11:11:07,819 WARN L207 SmtUtils]: Spent 10.21 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-10-24 11:11:07,820 INFO L354 Elim1Store]: treesize reduction 306, result has 32.2 percent of original size [2021-10-24 11:11:07,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 429 treesize of output 468 [2021-10-24 11:11:07,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:11:07,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771617099] [2021-10-24 11:11:07,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-24 11:11:07,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [538948707] [2021-10-24 11:11:07,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:11:07,828 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 11:11:07,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 11:11:07,847 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 11:11:07,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-24 11:11:08,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:11:08,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:08,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-24 11:11:08,352 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@764047ae [2021-10-24 11:11:08,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091867080] [2021-10-24 11:11:08,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 11:11:08,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:11:08,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:11:08,353 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:11:08,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-24 11:11:09,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 11:11:09,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 11:11:09,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-24 11:11:09,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@764047ae [2021-10-24 11:11:09,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:11:09,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-24 11:11:09,026 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-24 11:11:09,026 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-24 11:11:09,032 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:11:09,033 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:11:09,033 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:11:09,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-10-24 11:11:09,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-24 11:11:09,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-24 11:11:09,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:11:09,641 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:11:09,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:11:09 BoogieIcfgContainer [2021-10-24 11:11:09,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:11:09,655 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:11:09,655 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:11:09,655 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:11:09,655 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:09:07" (3/4) ... [2021-10-24 11:11:09,658 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 11:11:09,658 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:11:09,659 INFO L168 Benchmark]: Toolchain (without parser) took 124193.85 ms. Allocated memory was 54.5 MB in the beginning and 98.6 MB in the end (delta: 44.0 MB). Free memory was 31.4 MB in the beginning and 64.2 MB in the end (delta: -32.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:09,659 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory is still 35.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:11:09,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 591.41 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 31.2 MB in the beginning and 58.1 MB in the end (delta: -26.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:09,660 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.12 ms. Allocated memory is still 81.8 MB. Free memory was 57.9 MB in the beginning and 55.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:09,660 INFO L168 Benchmark]: Boogie Preprocessor took 51.13 ms. Allocated memory is still 81.8 MB. Free memory was 55.8 MB in the beginning and 53.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:09,660 INFO L168 Benchmark]: RCFGBuilder took 826.38 ms. Allocated memory is still 81.8 MB. Free memory was 53.7 MB in the beginning and 58.5 MB in the end (delta: -4.8 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:09,661 INFO L168 Benchmark]: TraceAbstraction took 122615.23 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 58.1 MB in the beginning and 65.1 MB in the end (delta: -7.0 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:09,661 INFO L168 Benchmark]: Witness Printer took 3.53 ms. Allocated memory is still 98.6 MB. Free memory was 65.1 MB in the beginning and 64.2 MB in the end (delta: 918.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:11:09,663 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 54.5 MB. Free memory is still 35.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 591.41 ms. Allocated memory was 54.5 MB in the beginning and 81.8 MB in the end (delta: 27.3 MB). Free memory was 31.2 MB in the beginning and 58.1 MB in the end (delta: -26.9 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 94.12 ms. Allocated memory is still 81.8 MB. Free memory was 57.9 MB in the beginning and 55.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.13 ms. Allocated memory is still 81.8 MB. Free memory was 55.8 MB in the beginning and 53.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 826.38 ms. Allocated memory is still 81.8 MB. Free memory was 53.7 MB in the beginning and 58.5 MB in the end (delta: -4.8 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 122615.23 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 58.1 MB in the beginning and 65.1 MB in the end (delta: -7.0 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Witness Printer took 3.53 ms. Allocated memory is still 98.6 MB. Free memory was 65.1 MB in the beginning and 64.2 MB in the end (delta: 918.9 kB). Peak memory consumption was 2.1 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 - UnprovableResult [Line: 1049]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L996] DLL* head = malloc(sizeof(DLL)); [L997] head->next = ((void*)0) [L998] head->prev = ((void*)0) [L999] head->data = 0 [L1001] DLL* x = head; [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1007] x = head [L1008] EXPR x->next [L1008] COND FALSE !(x->next != ((void*)0) && __VERIFIER_nondet_int()) [L1013] COND FALSE !(!(x != ((void*)0))) [L1015] x->data = 1 [L1017] EXPR x->next [L1017] COND TRUE x->next == ((void*)0) [L1019] x->next = malloc(sizeof(DLL)) [L1019] EXPR x->next [L1019] x->next->prev = x [L1019] EXPR x->next [L1019] x = x->next [L1019] x->next = ((void*)0) [L1019] x->data = 2 [L1025] DLL* prev = ((void*)0); [L1026] x = head [L1027] COND TRUE x != ((void*)0) [L1029] EXPR x->next [L1029] DLL* next = x->next; [L1031] x->next = prev [L1032] x->prev = next [L1034] prev = x [L1036] x = next [L1027] COND TRUE x != ((void*)0) [L1029] EXPR x->next [L1029] DLL* next = x->next; [L1031] x->next = prev [L1032] x->prev = next [L1034] prev = x [L1036] x = next [L1027] COND FALSE !(x != ((void*)0)) [L1039] head = prev [L1042] x = head [L1043] COND TRUE x != ((void*)0) [L1045] EXPR x->data [L1045] int t1 = x->data; [L1046] int t2 = 0; [L1047] COND TRUE t1 == 2 [L1048] EXPR x->next [L1048] EXPR x->next->data [L1048] t2 = x->next->data [L1049] COND TRUE !(t1 != 2 || t2 == 1) [L1049] reach_error() - UnprovableResult [Line: 1010]: 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: 1013]: 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, 35 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 122534.9ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 11.4ms, AutomataDifference: 14660.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 136 SDtfs, 269 SDslu, 234 SDs, 0 SdLazy, 341 SolverSat, 115 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 13813.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 249 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 930.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=5, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 79 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 117.5ms SsaConstructionTime, 420.2ms SatisfiabilityAnalysisTime, 79414.7ms InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 234 ConstructedInterpolants, 31 QuantifiedInterpolants, 3930 SizeOfPredicates, 35 NumberOfNonLiveVariables, 563 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 8/20 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 could not prove your program: unable to determine feasibility of some traces [2021-10-24 11:11:09,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_116059b2-e9ca-4995-ab06-e9ef06f20e80/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...