./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur --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 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:35:51,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:35:51,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:35:51,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:35:51,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:35:51,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:35:51,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:35:51,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:35:51,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:35:51,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:35:51,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:35:51,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:35:51,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:35:51,898 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:35:51,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:35:51,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:35:51,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:35:51,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:35:51,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:35:51,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:35:51,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:35:51,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:35:51,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:35:51,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:35:51,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:35:51,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:35:51,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:35:51,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:35:51,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:35:51,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:35:51,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:35:51,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:35:51,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:35:51,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:35:51,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:35:51,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:35:51,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:35:51,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:35:51,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:35:51,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:35:51,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:35:51,946 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:35:51,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:35:51,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:35:51,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:35:51,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:35:51,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:35:51,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:35:51,968 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:35:51,969 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:35:51,969 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:35:51,969 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:35:51,969 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:35:51,970 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:35:51,970 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:35:51,970 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:35:51,970 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:35:51,971 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:35:51,971 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:35:51,971 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:35:51,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:35:51,972 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:35:51,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:35:51,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:35:51,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:35:51,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:35:51,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:35:51,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:35:51,974 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:35:51,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:35:51,975 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:35:51,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:35:51,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:35:51,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:35:51,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:35:51,976 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:35:51,977 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:35:51,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:35:51,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:35:51,977 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:35:51,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:35:51,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:35:51,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:35:51,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2022-11-25 23:35:52,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:35:52,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:35:52,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:35:52,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:35:52,311 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:35:52,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-11-25 23:35:55,379 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:35:55,589 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:35:55,589 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2022-11-25 23:35:55,602 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/data/5e0c63c75/48adc3bbc0ac4cdf91a7cf5cb7525193/FLAGee530b478 [2022-11-25 23:35:55,616 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/data/5e0c63c75/48adc3bbc0ac4cdf91a7cf5cb7525193 [2022-11-25 23:35:55,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:35:55,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:35:55,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:35:55,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:35:55,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:35:55,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f83b69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55, skipping insertion in model container [2022-11-25 23:35:55,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:35:55,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:35:55,802 WARN L237 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_7b6ec03b-a3dc-473a-8d40-013d49dfc726/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-11-25 23:35:55,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:35:55,818 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:35:55,835 WARN L237 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_7b6ec03b-a3dc-473a-8d40-013d49dfc726/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2022-11-25 23:35:55,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:35:55,851 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:35:55,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55 WrapperNode [2022-11-25 23:35:55,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:35:55,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:35:55,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:35:55,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:35:55,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,884 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2022-11-25 23:35:55,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:35:55,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:35:55,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:35:55,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:35:55,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,905 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:35:55,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:35:55,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:35:55,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:35:55,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (1/1) ... [2022-11-25 23:35:55,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:35:55,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:55,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:35:55,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:35:55,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:35:55,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:35:55,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:35:55,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:35:55,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:35:55,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:35:55,990 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:35:55,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:35:56,092 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:35:56,094 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:35:56,208 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:35:56,265 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:35:56,266 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 23:35:56,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:35:56 BoogieIcfgContainer [2022-11-25 23:35:56,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:35:56,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:35:56,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:35:56,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:35:56,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:35:55" (1/3) ... [2022-11-25 23:35:56,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174b8c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:35:56, skipping insertion in model container [2022-11-25 23:35:56,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:35:55" (2/3) ... [2022-11-25 23:35:56,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174b8c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:35:56, skipping insertion in model container [2022-11-25 23:35:56,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:35:56" (3/3) ... [2022-11-25 23:35:56,298 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2022-11-25 23:35:56,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:35:56,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:35:56,385 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:35:56,392 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@15268d32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:35:56,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:35:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:35:56,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:56,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:56,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:56,410 INFO L85 PathProgramCache]: Analyzing trace with hash 272684364, now seen corresponding path program 1 times [2022-11-25 23:35:56,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:56,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320397308] [2022-11-25 23:35:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:56,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:56,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320397308] [2022-11-25 23:35:56,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320397308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:56,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:35:56,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:35:56,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174220984] [2022-11-25 23:35:56,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:56,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:35:56,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:35:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:35:56,738 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:56,790 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2022-11-25 23:35:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:35:56,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 23:35:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:56,801 INFO L225 Difference]: With dead ends: 21 [2022-11-25 23:35:56,801 INFO L226 Difference]: Without dead ends: 10 [2022-11-25 23:35:56,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:35:56,808 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:56,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:56,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-25 23:35:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-25 23:35:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-25 23:35:56,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-11-25 23:35:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:56,845 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-25 23:35:56,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-25 23:35:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 23:35:56,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:56,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:56,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:35:56,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:56,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:56,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2077770057, now seen corresponding path program 1 times [2022-11-25 23:35:56,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:56,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837797664] [2022-11-25 23:35:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:56,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:56,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:56,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837797664] [2022-11-25 23:35:56,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837797664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:56,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574634752] [2022-11-25 23:35:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:56,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:56,981 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:57,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:35:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:57,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:35:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:57,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:35:57,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574634752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1865283568] [2022-11-25 23:35:57,153 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:35:57,154 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:57,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:57,163 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:57,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:57,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:57,347 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 23:35:57,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-25 23:35:57,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:57,442 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:35:57,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:35:57,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:57,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:35:57,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:57,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:35:57,817 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:35:57,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-25 23:35:58,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:35:58,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:35:58,108 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:58,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1865283568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:35:58,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:58,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2022-11-25 23:35:58,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073085025] [2022-11-25 23:35:58,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:35:58,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:35:58,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:58,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:35:58,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:35:58,417 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:58,471 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-11-25 23:35:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:35:58,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 23:35:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:58,473 INFO L225 Difference]: With dead ends: 15 [2022-11-25 23:35:58,473 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 23:35:58,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:35:58,482 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:58,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 23:35:58,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-25 23:35:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-25 23:35:58,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2022-11-25 23:35:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:58,495 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-25 23:35:58,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-25 23:35:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:35:58,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:58,496 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:58,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:35:58,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:58,703 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash 420679642, now seen corresponding path program 1 times [2022-11-25 23:35:58,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:58,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662156807] [2022-11-25 23:35:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:58,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:35:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:35:58,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:35:58,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662156807] [2022-11-25 23:35:58,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662156807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:35:58,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582867657] [2022-11-25 23:35:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:58,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:58,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:35:58,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:35:58,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:35:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:35:58,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:35:58,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:35:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:35:58,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:35:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:35:58,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582867657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:35:58,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306157799] [2022-11-25 23:35:58,926 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:35:58,927 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:35:58,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:35:58,927 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:35:58,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:35:58,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:58,991 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:35:58,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:35:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:59,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-25 23:35:59,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:59,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:35:59,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:59,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:35:59,163 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:35:59,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-11-25 23:35:59,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:35:59,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:35:59,338 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:35:59,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '220#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:35:59,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:35:59,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:35:59,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 23:35:59,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653635935] [2022-11-25 23:35:59,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:35:59,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:35:59,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:35:59,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:35:59,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:35:59,734 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) 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) [2022-11-25 23:35:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:59,753 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-11-25 23:35:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:35:59,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) 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 11 [2022-11-25 23:35:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:59,754 INFO L225 Difference]: With dead ends: 24 [2022-11-25 23:35:59,754 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 23:35:59,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:35:59,756 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:59,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:35:59,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 23:35:59,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 23:35:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-25 23:35:59,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-11-25 23:35:59,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:59,763 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-25 23:35:59,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) 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) [2022-11-25 23:35:59,763 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-25 23:35:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:35:59,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:35:59,764 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:59,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:59,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:35:59,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:35:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:35:59,971 INFO L85 PathProgramCache]: Analyzing trace with hash 55551983, now seen corresponding path program 2 times [2022-11-25 23:35:59,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:35:59,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977435976] [2022-11-25 23:35:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:35:59,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:36:00,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977435976] [2022-11-25 23:36:00,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977435976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96565043] [2022-11-25 23:36:00,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:36:00,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:00,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:00,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:00,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:36:00,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:36:00,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:36:00,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:36:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:00,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:36:00,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:36:00,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-25 23:36:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:36:00,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:00,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-25 23:36:00,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-11-25 23:36:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:36:00,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96565043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:00,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294377078] [2022-11-25 23:36:00,499 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:36:00,499 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:00,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:00,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:00,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:00,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:00,553 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 23:36:00,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-25 23:36:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:00,605 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:36:00,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:36:00,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:00,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:36:00,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:00,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:36:00,743 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:36:00,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-25 23:36:00,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:36:00,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:36:00,923 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:01,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '376#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:01,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:01,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:36:01,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-11-25 23:36:01,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524022808] [2022-11-25 23:36:01,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:01,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:36:01,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:01,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:36:01,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:36:01,319 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:01,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:01,519 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-11-25 23:36:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:36:01,525 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 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 14 [2022-11-25 23:36:01,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:01,526 INFO L225 Difference]: With dead ends: 31 [2022-11-25 23:36:01,526 INFO L226 Difference]: Without dead ends: 20 [2022-11-25 23:36:01,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-11-25 23:36:01,527 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:01,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:36:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-25 23:36:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-25 23:36:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-25 23:36:01,534 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-11-25 23:36:01,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:01,534 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-25 23:36:01,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-25 23:36:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 23:36:01,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:01,535 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:01,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:36:01,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:01,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:01,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:01,742 INFO L85 PathProgramCache]: Analyzing trace with hash 960336160, now seen corresponding path program 3 times [2022-11-25 23:36:01,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:01,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051505043] [2022-11-25 23:36:01,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:01,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:36:01,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:01,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051505043] [2022-11-25 23:36:01,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051505043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:01,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582247889] [2022-11-25 23:36:01,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:36:01,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:01,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:01,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:01,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:36:02,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:36:02,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:36:02,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:36:02,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:36:02,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:36:02,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582247889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:02,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1465866951] [2022-11-25 23:36:02,099 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:36:02,100 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:02,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:02,100 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:02,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:02,144 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:36:02,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:36:02,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:02,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-25 23:36:02,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:02,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:36:02,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:02,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:36:02,273 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:36:02,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-25 23:36:02,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:36:02,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:36:02,435 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:02,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '591#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:02,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:02,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:36:02,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-25 23:36:02,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258741695] [2022-11-25 23:36:02,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:02,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:36:02,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:02,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:36:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:36:02,772 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:02,802 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-11-25 23:36:02,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:36:02,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-25 23:36:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:02,803 INFO L225 Difference]: With dead ends: 40 [2022-11-25 23:36:02,803 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 23:36:02,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:36:02,806 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:02,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:36:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 23:36:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 23:36:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-11-25 23:36:02,816 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2022-11-25 23:36:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:02,817 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-11-25 23:36:02,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-11-25 23:36:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 23:36:02,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:02,818 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:02,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:36:03,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:03,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:03,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:03,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1415055627, now seen corresponding path program 4 times [2022-11-25 23:36:03,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:03,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278686467] [2022-11-25 23:36:03,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:03,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:36:03,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:03,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278686467] [2022-11-25 23:36:03,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278686467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:03,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328432054] [2022-11-25 23:36:03,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:36:03,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:03,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:03,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:03,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:36:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:03,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:36:03,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:36:03,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:36:03,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328432054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:03,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1027311306] [2022-11-25 23:36:03,681 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:36:03,681 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:03,681 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:03,681 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:03,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:03,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:03,720 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 23:36:03,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-25 23:36:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:03,763 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:36:03,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:36:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:03,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:36:03,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:03,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:36:03,875 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:36:03,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-25 23:36:03,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:36:03,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:36:04,039 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:04,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '882#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:04,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:04,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:36:04,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2022-11-25 23:36:04,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752888976] [2022-11-25 23:36:04,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:04,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 23:36:04,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 23:36:04,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=821, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:36:04,396 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:04,469 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-11-25 23:36:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 23:36:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-25 23:36:04,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:04,479 INFO L225 Difference]: With dead ends: 54 [2022-11-25 23:36:04,479 INFO L226 Difference]: Without dead ends: 41 [2022-11-25 23:36:04,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=821, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:36:04,481 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:04,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:36:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-25 23:36:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-25 23:36:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-25 23:36:04,493 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2022-11-25 23:36:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:04,493 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-25 23:36:04,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-25 23:36:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 23:36:04,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:04,495 INFO L195 NwaCegarLoop]: trace histogram [26, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:04,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:36:04,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:04,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash 410080405, now seen corresponding path program 5 times [2022-11-25 23:36:04,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:04,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39661727] [2022-11-25 23:36:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:04,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 23:36:05,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:05,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39661727] [2022-11-25 23:36:05,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39661727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:05,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848391846] [2022-11-25 23:36:05,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:36:05,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:05,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:05,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:05,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:36:05,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:36:05,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:36:05,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:36:05,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:05,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:36:06,079 INFO L321 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2022-11-25 23:36:06,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 73 [2022-11-25 23:36:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-25 23:36:06,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:06,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-25 23:36:06,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:36:06,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 86 [2022-11-25 23:36:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-25 23:36:06,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848391846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:06,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1519265918] [2022-11-25 23:36:06,988 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:36:06,988 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:06,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:06,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:06,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:07,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:07,038 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:36:07,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:36:07,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:07,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-25 23:36:07,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:07,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:36:07,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:07,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:36:07,161 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:36:07,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-25 23:36:07,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:36:07,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:36:07,308 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:07,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1330#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:07,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:07,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:36:07,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11, 11] total 46 [2022-11-25 23:36:07,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350524670] [2022-11-25 23:36:07,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:07,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 23:36:07,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:07,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 23:36:07,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 23:36:07,890 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:09,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:09,006 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-11-25 23:36:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 23:36:09,007 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 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 40 [2022-11-25 23:36:09,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:09,007 INFO L225 Difference]: With dead ends: 67 [2022-11-25 23:36:09,007 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 23:36:09,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=693, Invalid=3467, Unknown=0, NotChecked=0, Total=4160 [2022-11-25 23:36:09,010 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:09,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 23 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:36:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 23:36:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-25 23:36:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-11-25 23:36:09,031 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 40 [2022-11-25 23:36:09,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:09,032 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-11-25 23:36:09,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-11-25 23:36:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 23:36:09,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:09,033 INFO L195 NwaCegarLoop]: trace histogram [27, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:09,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:36:09,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:09,239 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:09,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:09,240 INFO L85 PathProgramCache]: Analyzing trace with hash 324276492, now seen corresponding path program 6 times [2022-11-25 23:36:09,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:09,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708903422] [2022-11-25 23:36:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:09,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 23:36:10,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:10,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708903422] [2022-11-25 23:36:10,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708903422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:10,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441332188] [2022-11-25 23:36:10,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:36:10,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:10,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:10,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:10,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:36:10,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:36:10,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:36:10,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 23:36:10,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 23:36:10,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 23:36:11,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441332188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:11,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [8845629] [2022-11-25 23:36:11,540 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:36:11,541 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:11,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:11,541 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:11,541 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:11,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:11,582 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:36:11,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:36:11,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:11,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-25 23:36:11,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:11,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:36:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:11,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:11,716 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:36:11,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-11-25 23:36:11,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:36:11,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:36:11,855 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:12,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1901#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:12,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:12,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:36:12,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 58 [2022-11-25 23:36:12,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730385537] [2022-11-25 23:36:12,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:12,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-25 23:36:12,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:12,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-25 23:36:12,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1744, Invalid=2546, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 23:36:12,327 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:12,433 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2022-11-25 23:36:12,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 23:36:12,433 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-25 23:36:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:12,434 INFO L225 Difference]: With dead ends: 100 [2022-11-25 23:36:12,434 INFO L226 Difference]: Without dead ends: 79 [2022-11-25 23:36:12,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1744, Invalid=2546, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 23:36:12,437 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:12,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:36:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-25 23:36:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-25 23:36:12,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-11-25 23:36:12,459 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 49 [2022-11-25 23:36:12,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:12,459 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-11-25 23:36:12,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-11-25 23:36:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-25 23:36:12,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:12,461 INFO L195 NwaCegarLoop]: trace histogram [56, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:12,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:36:12,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:36:12,668 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2093146303, now seen corresponding path program 7 times [2022-11-25 23:36:12,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:12,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521835743] [2022-11-25 23:36:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:12,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 23:36:15,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:15,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521835743] [2022-11-25 23:36:15,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521835743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:15,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772147530] [2022-11-25 23:36:15,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:36:15,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:15,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:15,572 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:15,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:36:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:15,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 23:36:15,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 23:36:15,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 23:36:20,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772147530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:20,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [510019396] [2022-11-25 23:36:20,113 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:36:20,114 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:20,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:20,114 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:20,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:20,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:20,170 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:36:20,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:36:20,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:20,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-25 23:36:20,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:20,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:36:20,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:20,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:36:20,282 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:36:20,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-25 23:36:20,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:36:20,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:36:20,449 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:21,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2804#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:21,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:21,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:36:21,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 116 [2022-11-25 23:36:21,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659021770] [2022-11-25 23:36:21,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:21,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-11-25 23:36:21,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:21,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-11-25 23:36:21,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6819, Invalid=8433, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 23:36:21,065 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:21,333 INFO L93 Difference]: Finished difference Result 158 states and 217 transitions. [2022-11-25 23:36:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-25 23:36:21,334 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 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 78 [2022-11-25 23:36:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:21,336 INFO L225 Difference]: With dead ends: 158 [2022-11-25 23:36:21,336 INFO L226 Difference]: Without dead ends: 137 [2022-11-25 23:36:21,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6819, Invalid=8433, Unknown=0, NotChecked=0, Total=15252 [2022-11-25 23:36:21,340 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:21,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:36:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-25 23:36:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-25 23:36:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-11-25 23:36:21,374 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 78 [2022-11-25 23:36:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:21,375 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-11-25 23:36:21,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-11-25 23:36:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-25 23:36:21,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:21,378 INFO L195 NwaCegarLoop]: trace histogram [114, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:21,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:36:21,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:21,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1365947615, now seen corresponding path program 8 times [2022-11-25 23:36:21,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:21,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053050629] [2022-11-25 23:36:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:21,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 23:36:30,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:30,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053050629] [2022-11-25 23:36:30,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053050629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:30,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184658871] [2022-11-25 23:36:30,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:36:30,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:30,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:30,849 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:30,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:36:31,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-25 23:36:31,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:36:31,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-25 23:36:31,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:36:31,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:36:33,862 INFO L321 Elim1Store]: treesize reduction 24, result has 82.0 percent of original size [2022-11-25 23:36:33,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 139 [2022-11-25 23:36:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 5995 trivial. 0 not checked. [2022-11-25 23:36:34,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:36:37,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 99 [2022-11-25 23:36:37,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:36:37,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 138 treesize of output 170 [2022-11-25 23:36:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2022-11-25 23:36:37,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184658871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:36:37,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916962211] [2022-11-25 23:36:37,701 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:36:37,702 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:36:37,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:36:37,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:36:37,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:36:37,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:37,751 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:36:37,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:36:37,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:37,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-25 23:36:37,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:37,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:36:37,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:36:37,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:36:37,861 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:36:37,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-25 23:36:37,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:36:37,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:36:38,009 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:36:39,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4324#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:36:39,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:36:39,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:36:39,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 24, 19] total 154 [2022-11-25 23:36:39,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251701606] [2022-11-25 23:36:39,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:36:39,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-11-25 23:36:39,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:36:39,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-11-25 23:36:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7536, Invalid=18224, Unknown=0, NotChecked=0, Total=25760 [2022-11-25 23:36:39,312 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 154 states, 154 states have (on average 1.0909090909090908) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:36:50,317 INFO L93 Difference]: Finished difference Result 183 states and 193 transitions. [2022-11-25 23:36:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-11-25 23:36:50,324 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.0909090909090908) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-11-25 23:36:50,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:36:50,329 INFO L225 Difference]: With dead ends: 183 [2022-11-25 23:36:50,329 INFO L226 Difference]: Without dead ends: 154 [2022-11-25 23:36:50,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7137 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=8073, Invalid=25967, Unknown=0, NotChecked=0, Total=34040 [2022-11-25 23:36:50,333 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:36:50,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 53 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:36:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-25 23:36:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-11-25 23:36:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-11-25 23:36:50,371 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 136 [2022-11-25 23:36:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:36:50,371 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-11-25 23:36:50,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.0909090909090908) internal successors, (168), 154 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:36:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-11-25 23:36:50,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-25 23:36:50,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:36:50,374 INFO L195 NwaCegarLoop]: trace histogram [115, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:36:50,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:36:50,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:50,580 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:36:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:36:50,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1360355676, now seen corresponding path program 9 times [2022-11-25 23:36:50,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:36:50,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932218439] [2022-11-25 23:36:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:36:50,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:36:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:36:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-25 23:36:59,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:36:59,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932218439] [2022-11-25 23:36:59,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932218439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:36:59,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472593188] [2022-11-25 23:36:59,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:36:59,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:36:59,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:36:59,473 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:36:59,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:36:59,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:36:59,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:36:59,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-25 23:36:59,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-25 23:37:00,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:37:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-25 23:37:16,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472593188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:37:16,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1485158378] [2022-11-25 23:37:16,392 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:37:16,393 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:37:16,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:37:16,393 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:37:16,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:37:16,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:16,429 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 23:37:16,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2022-11-25 23:37:16,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:16,466 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:37:16,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:37:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:16,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:37:16,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:16,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:37:16,568 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:37:16,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 236 treesize of output 224 [2022-11-25 23:37:16,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:37:16,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:37:16,689 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:37:17,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6135#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:37:17,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:37:17,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:37:17,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 234 [2022-11-25 23:37:17,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158254705] [2022-11-25 23:37:17,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:37:17,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2022-11-25 23:37:17,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:37:17,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2022-11-25 23:37:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27528, Invalid=30794, Unknown=0, NotChecked=0, Total=58322 [2022-11-25 23:37:17,739 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:18,608 INFO L93 Difference]: Finished difference Result 308 states and 426 transitions. [2022-11-25 23:37:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2022-11-25 23:37:18,612 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 0 states have call successors, (0), 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 153 [2022-11-25 23:37:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:18,613 INFO L225 Difference]: With dead ends: 308 [2022-11-25 23:37:18,613 INFO L226 Difference]: Without dead ends: 271 [2022-11-25 23:37:18,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=27528, Invalid=30794, Unknown=0, NotChecked=0, Total=58322 [2022-11-25 23:37:18,618 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:18,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:37:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-25 23:37:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-11-25 23:37:18,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0074074074074073) internal successors, (272), 270 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2022-11-25 23:37:18,679 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 153 [2022-11-25 23:37:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:37:18,679 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2022-11-25 23:37:18,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 234 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:37:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2022-11-25 23:37:18,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-25 23:37:18,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:37:18,684 INFO L195 NwaCegarLoop]: trace histogram [232, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:37:18,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:37:18,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 23:37:18,891 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:37:18,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:37:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash 648030297, now seen corresponding path program 10 times [2022-11-25 23:37:18,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:37:18,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243428047] [2022-11-25 23:37:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:37:18,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:37:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-25 23:37:51,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:37:51,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243428047] [2022-11-25 23:37:51,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243428047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:37:51,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113704228] [2022-11-25 23:37:51,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:37:51,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:37:51,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:37:51,407 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:37:51,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:37:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:37:52,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 2230 conjuncts, 234 conjunts are in the unsatisfiable core [2022-11-25 23:37:52,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:37:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-25 23:37:52,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:38:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-25 23:38:57,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113704228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:38:57,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [906930624] [2022-11-25 23:38:57,358 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:38:57,358 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:38:57,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:38:57,359 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:38:57,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:38:57,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:57,401 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:38:57,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:38:57,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:57,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-25 23:38:57,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:57,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:38:57,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:38:57,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:38:57,511 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:38:57,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-25 23:38:57,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:38:57,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:38:57,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:38:59,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9318#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:38:59,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:38:59,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:38:59,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 468 [2022-11-25 23:38:59,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588013691] [2022-11-25 23:38:59,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:38:59,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 469 states [2022-11-25 23:38:59,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:38:59,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 469 interpolants. [2022-11-25 23:38:59,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109779, Invalid=116321, Unknown=0, NotChecked=0, Total=226100 [2022-11-25 23:38:59,245 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:39:03,163 INFO L93 Difference]: Finished difference Result 542 states and 777 transitions. [2022-11-25 23:39:03,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2022-11-25 23:39:03,165 INFO L78 Accepts]: Start accepts. Automaton has has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 0 states have call successors, (0), 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 270 [2022-11-25 23:39:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:39:03,167 INFO L225 Difference]: With dead ends: 542 [2022-11-25 23:39:03,167 INFO L226 Difference]: Without dead ends: 505 [2022-11-25 23:39:03,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 474 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5825 ImplicationChecksByTransitivity, 87.6s TimeCoverageRelationStatistics Valid=109779, Invalid=116321, Unknown=0, NotChecked=0, Total=226100 [2022-11-25 23:39:03,177 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:39:03,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:39:03,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-25 23:39:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2022-11-25 23:39:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.003968253968254) internal successors, (506), 504 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 506 transitions. [2022-11-25 23:39:03,249 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 506 transitions. Word has length 270 [2022-11-25 23:39:03,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:39:03,249 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 506 transitions. [2022-11-25 23:39:03,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 469 states, 469 states have (on average 1.0170575692963753) internal successors, (477), 468 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:39:03,250 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 506 transitions. [2022-11-25 23:39:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-11-25 23:39:03,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:39:03,261 INFO L195 NwaCegarLoop]: trace histogram [466, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:39:03,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:39:03,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 23:39:03,469 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:39:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:39:03,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1601768761, now seen corresponding path program 11 times [2022-11-25 23:39:03,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:39:03,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542163745] [2022-11-25 23:39:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:39:03,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:39:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 108811 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-25 23:41:19,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:41:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542163745] [2022-11-25 23:41:19,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542163745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:41:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523973880] [2022-11-25 23:41:19,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:41:19,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:19,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:19,291 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:19,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:41:28,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-25 23:41:28,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:41:28,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-25 23:41:28,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:29,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:41:47,078 INFO L321 Elim1Store]: treesize reduction 56, result has 92.1 percent of original size [2022-11-25 23:41:47,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 51 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 151 treesize of output 719 [2022-11-25 23:42:05,644 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 23:42:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 105111 trivial. 0 not checked. [2022-11-25 23:42:05,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:42:30,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 226 [2022-11-25 23:42:30,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:42:30,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 345 treesize of output 840 [2022-11-25 23:42:31,833 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 23:42:32,280 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-11-25 23:42:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 108811 trivial. 0 not checked. [2022-11-25 23:42:32,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523973880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:42:32,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154589439] [2022-11-25 23:42:32,309 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-25 23:42:32,310 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:42:32,310 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:42:32,310 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:42:32,310 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:42:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:32,353 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-25 23:42:32,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-25 23:42:32,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:32,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-25 23:42:32,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:32,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:42:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:42:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:42:32,455 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:42:32,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 226 treesize of output 225 [2022-11-25 23:42:32,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:42:32,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:42:32,601 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:42:36,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14916#(and (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (<= 0 |ULTIMATE.start_main_~#main__a~0#1.base|) (<= |ULTIMATE.start_main_~main__marker~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~main__pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~main__i~0#1| |ULTIMATE.start_main_~main__pos~0#1|) 1 0) |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ |ULTIMATE.start_main_~main__marker~0#1| 2147483648)) (= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~main__pos~0#1| 100000) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~#main__a~0#1.offset| 0) (= |ULTIMATE.start_main_~main__marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#main__a~0#1.base|) (+ |ULTIMATE.start_main_~#main__a~0#1.offset| (* |ULTIMATE.start_main_~main__i~0#1| 4)))) (= |#NULL.base| 0))' at error location [2022-11-25 23:42:36,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:42:36,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:42:36,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [468, 43, 35] total 544 [2022-11-25 23:42:36,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571152365] [2022-11-25 23:42:36,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:42:36,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 544 states [2022-11-25 23:42:36,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:36,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 544 interpolants. [2022-11-25 23:42:36,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114498, Invalid=188552, Unknown=0, NotChecked=0, Total=303050 [2022-11-25 23:42:36,363 INFO L87 Difference]: Start difference. First operand 505 states and 506 transitions. Second operand has 544 states, 544 states have (on average 1.0275735294117647) internal successors, (559), 544 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:28,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:28,485 INFO L93 Difference]: Finished difference Result 591 states and 609 transitions. [2022-11-25 23:46:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 548 states. [2022-11-25 23:46:28,486 INFO L78 Accepts]: Start accepts. Automaton has has 544 states, 544 states have (on average 1.0275735294117647) internal successors, (559), 544 states have internal predecessors, (559), 0 states have call successors, (0), 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 504 [2022-11-25 23:46:28,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:28,489 INFO L225 Difference]: With dead ends: 591 [2022-11-25 23:46:28,489 INFO L226 Difference]: Without dead ends: 538 [2022-11-25 23:46:28,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2495 GetRequests, 1429 SyntacticMatches, 0 SemanticMatches, 1066 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203067 ImplicationChecksByTransitivity, 356.6s TimeCoverageRelationStatistics Valid=332988, Invalid=806568, Unknown=0, NotChecked=0, Total=1139556 [2022-11-25 23:46:28,552 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 414 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:28,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 91 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 23:46:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-25 23:46:28,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-11-25 23:46:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.0037243947858474) internal successors, (539), 537 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 539 transitions. [2022-11-25 23:46:28,629 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 539 transitions. Word has length 504 [2022-11-25 23:46:28,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:28,630 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 539 transitions. [2022-11-25 23:46:28,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 544 states, 544 states have (on average 1.0275735294117647) internal successors, (559), 544 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 539 transitions. [2022-11-25 23:46:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-11-25 23:46:28,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:28,644 INFO L195 NwaCegarLoop]: trace histogram [467, 32, 31, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:28,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 23:46:28,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:28,854 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:28,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:28,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1419112236, now seen corresponding path program 12 times [2022-11-25 23:46:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:28,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026177282] [2022-11-25 23:46:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:28,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:48:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 110270 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-11-25 23:48:52,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:48:52,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026177282] [2022-11-25 23:48:52,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026177282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:48:52,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315420672] [2022-11-25 23:48:52,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:48:52,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:52,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:52,690 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:52,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b6ec03b-a3dc-473a-8d40-013d49dfc726/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:48:53,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:48:53,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:48:53,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 4425 conjuncts, 469 conjunts are in the unsatisfiable core [2022-11-25 23:48:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 110270 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-11-25 23:48:54,695 INFO L328 TraceCheckSpWp]: Computing backward predicates...