./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i --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_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/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_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/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_80782401-cb2a-49ce-856f-9fbc3b13cc28/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 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 --- 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 [2022-11-26 00:41:09,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:41:09,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:41:09,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:41:09,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:41:09,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:41:09,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:41:09,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:41:09,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:41:09,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:41:09,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:41:09,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:41:09,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:41:09,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:41:09,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:41:09,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:41:09,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:41:09,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:41:09,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:41:09,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:41:09,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:41:09,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:41:09,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:41:09,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:41:09,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:41:09,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:41:09,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:41:09,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:41:09,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:41:09,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:41:09,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:41:09,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:41:09,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:41:09,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:41:09,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:41:09,640 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:41:09,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:41:09,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:41:09,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:41:09,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:41:09,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:41:09,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:41:09,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:41:09,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:41:09,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:41:09,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:41:09,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:41:09,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:41:09,684 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:41:09,684 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:41:09,685 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:41:09,685 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:41:09,686 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:41:09,686 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:41:09,687 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:41:09,687 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:41:09,687 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:41:09,687 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:41:09,688 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:41:09,688 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:41:09,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:41:09,689 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:41:09,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:41:09,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:41:09,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:41:09,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:41:09,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:41:09,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:41:09,691 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:41:09,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:41:09,692 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:41:09,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:41:09,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:41:09,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:41:09,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:41:09,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:41:09,693 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:41:09,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:41:09,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:41:09,694 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:41:09,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:41:09,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:41:09,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:41:09,695 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_80782401-cb2a-49ce-856f-9fbc3b13cc28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45c2395b28f523380bfcff26ce2efb02406d69c6cc122ac9297e3f35ef9c7306 [2022-11-26 00:41:09,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:41:09,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:41:09,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:41:09,985 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:41:09,986 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:41:09,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2022-11-26 00:41:13,023 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:41:13,212 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:41:13,213 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i [2022-11-26 00:41:13,219 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/data/26e451dec/9544aa321b6e46439d25830b93899c99/FLAG8229e0119 [2022-11-26 00:41:13,581 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/data/26e451dec/9544aa321b6e46439d25830b93899c99 [2022-11-26 00:41:13,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:41:13,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:41:13,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:41:13,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:41:13,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:41:13,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cdf522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13, skipping insertion in model container [2022-11-26 00:41:13,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:41:13,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:41:13,776 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_80782401-cb2a-49ce-856f-9fbc3b13cc28/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2022-11-26 00:41:13,800 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:41:13,808 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:41:13,818 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_80782401-cb2a-49ce-856f-9fbc3b13cc28/sv-benchmarks/c/array-examples/standard_allDiff2_ground.i[817,830] [2022-11-26 00:41:13,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:41:13,843 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:41:13,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13 WrapperNode [2022-11-26 00:41:13,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:41:13,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:41:13,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:41:13,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:41:13,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,874 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-26 00:41:13,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:41:13,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:41:13,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:41:13,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:41:13,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,901 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,902 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:41:13,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:41:13,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:41:13,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:41:13,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (1/1) ... [2022-11-26 00:41:13,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:41:13,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:13,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:41:13,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:41:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:41:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:41:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:41:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:41:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:41:13,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:41:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:41:13,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:41:14,044 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:41:14,046 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:41:14,189 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:41:14,248 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:41:14,248 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-26 00:41:14,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:41:14 BoogieIcfgContainer [2022-11-26 00:41:14,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:41:14,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:41:14,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:41:14,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:41:14,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:41:13" (1/3) ... [2022-11-26 00:41:14,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf134d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:41:14, skipping insertion in model container [2022-11-26 00:41:14,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:41:13" (2/3) ... [2022-11-26 00:41:14,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cf134d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:41:14, skipping insertion in model container [2022-11-26 00:41:14,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:41:14" (3/3) ... [2022-11-26 00:41:14,264 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2022-11-26 00:41:14,285 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:41:14,285 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:41:14,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:41:14,364 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;@2d47fec3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:41:14,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:41:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:41:14,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:14,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:14,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1443804038, now seen corresponding path program 1 times [2022-11-26 00:41:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:14,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260969910] [2022-11-26 00:41:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:14,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:14,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260969910] [2022-11-26 00:41:14,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260969910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:14,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:14,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:41:14,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343759150] [2022-11-26 00:41:14,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:14,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:41:14,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:14,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:41:14,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:41:14,833 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-11-26 00:41:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:14,877 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2022-11-26 00:41:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:41:14,880 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 [2022-11-26 00:41:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:14,887 INFO L225 Difference]: With dead ends: 25 [2022-11-26 00:41:14,888 INFO L226 Difference]: Without dead ends: 12 [2022-11-26 00:41:14,890 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 [2022-11-26 00:41:14,894 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 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 [2022-11-26 00:41:14,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:41:14,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-26 00:41:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-26 00:41:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2022-11-26 00:41:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-26 00:41:14,926 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2022-11-26 00:41:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:14,926 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-26 00:41:14,927 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) [2022-11-26 00:41:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-26 00:41:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:41:14,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:14,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:14,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:41:14,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:14,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:14,929 INFO L85 PathProgramCache]: Analyzing trace with hash 322298903, now seen corresponding path program 1 times [2022-11-26 00:41:14,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:14,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982346691] [2022-11-26 00:41:14,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:14,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:15,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:15,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982346691] [2022-11-26 00:41:15,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982346691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:15,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298723041] [2022-11-26 00:41:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:15,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:15,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:15,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:15,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:41:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:15,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:41:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:15,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:41:15,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:41:15,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298723041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:15,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:41:15,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 5 [2022-11-26 00:41:15,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3275065] [2022-11-26 00:41:15,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:15,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:41:15,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:15,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:41:15,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:41:15,152 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:15,195 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-11-26 00:41:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:41:15,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:41:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:15,197 INFO L225 Difference]: With dead ends: 21 [2022-11-26 00:41:15,197 INFO L226 Difference]: Without dead ends: 14 [2022-11-26 00:41:15,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:41:15,199 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:15,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:41:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-26 00:41:15,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-11-26 00:41:15,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2022-11-26 00:41:15,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 9 [2022-11-26 00:41:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:15,205 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2022-11-26 00:41:15,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:15,205 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2022-11-26 00:41:15,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:41:15,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:15,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:15,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:15,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:15,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash 537647847, now seen corresponding path program 1 times [2022-11-26 00:41:15,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:15,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824952755] [2022-11-26 00:41:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:15,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:41:15,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:15,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824952755] [2022-11-26 00:41:15,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824952755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:15,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945089686] [2022-11-26 00:41:15,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:15,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:15,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:15,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:41:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:15,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:41:15,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:41:15,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:41:15,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945089686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:15,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282934256] [2022-11-26 00:41:15,668 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:15,669 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:15,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:15,679 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:15,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:15,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,776 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:41:15,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:41:15,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,811 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:41:15,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:41:15,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:41:15,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:15,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:15,986 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:41:15,986 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 192 treesize of output 191 [2022-11-26 00:41:16,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-26 00:41:16,283 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:16,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1282934256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:16,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:16,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2022-11-26 00:41:16,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697374238] [2022-11-26 00:41:16,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:16,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:41:16,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:41:16,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:41:16,379 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-26 00:41:16,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:16,446 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2022-11-26 00:41:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:41:16,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) Word has length 11 [2022-11-26 00:41:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:16,448 INFO L225 Difference]: With dead ends: 24 [2022-11-26 00:41:16,448 INFO L226 Difference]: Without dead ends: 15 [2022-11-26 00:41:16,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:41:16,458 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:16,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 12 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:41:16,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-26 00:41:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-11-26 00:41:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-26 00:41:16,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 11 [2022-11-26 00:41:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:16,467 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-26 00:41:16,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 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) [2022-11-26 00:41:16,468 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-26 00:41:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:41:16,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:16,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:16,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:16,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:16,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:16,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:16,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1838473358, now seen corresponding path program 1 times [2022-11-26 00:41:16,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:16,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838164629] [2022-11-26 00:41:16,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:16,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:41:16,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838164629] [2022-11-26 00:41:16,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838164629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44555252] [2022-11-26 00:41:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:16,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:16,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:16,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:16,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:41:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:16,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:41:16,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:41:16,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:41:16,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44555252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:16,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314729828] [2022-11-26 00:41:16,919 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:16,919 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:16,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:16,920 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:16,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:16,955 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:41:16,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:41:16,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:16,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:41:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:16,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:41:17,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:17,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:17,112 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:41:17,113 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 202 treesize of output 190 [2022-11-26 00:41:17,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-26 00:41:17,375 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:17,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '358#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:17,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:17,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:17,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-26 00:41:17,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457144323] [2022-11-26 00:41:17,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:17,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:41:17,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:41:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:41:17,769 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:17,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:17,829 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2022-11-26 00:41:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:41:17,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:41:17,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:17,831 INFO L225 Difference]: With dead ends: 46 [2022-11-26 00:41:17,831 INFO L226 Difference]: Without dead ends: 35 [2022-11-26 00:41:17,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:41:17,834 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:17,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 24 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:41:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-26 00:41:17,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 17. [2022-11-26 00:41:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 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) [2022-11-26 00:41:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-26 00:41:17,850 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2022-11-26 00:41:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:17,850 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-26 00:41:17,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-11-26 00:41:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:41:17,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:17,853 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:17,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:18,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:18,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:18,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:18,059 INFO L85 PathProgramCache]: Analyzing trace with hash 179221003, now seen corresponding path program 2 times [2022-11-26 00:41:18,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:18,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111247954] [2022-11-26 00:41:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:18,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:41:18,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111247954] [2022-11-26 00:41:18,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111247954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842138754] [2022-11-26 00:41:18,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:41:18,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:18,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:18,223 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:18,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:41:18,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:41:18,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:41:18,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:41:18,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:41:18,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:41:18,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842138754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:18,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [739921269] [2022-11-26 00:41:18,336 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:18,336 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:18,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:18,337 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:18,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:18,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:18,376 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:41:18,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:41:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:18,402 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:41:18,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:41:18,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:18,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:41:18,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:18,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:18,514 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:41:18,515 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 192 treesize of output 191 [2022-11-26 00:41:18,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:41:18,735 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:19,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '556#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:19,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:19,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:19,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-26 00:41:19,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500848631] [2022-11-26 00:41:19,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:19,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:41:19,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:41:19,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:41:19,068 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2022-11-26 00:41:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:19,150 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-11-26 00:41:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:41:19,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) Word has length 15 [2022-11-26 00:41:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:19,151 INFO L225 Difference]: With dead ends: 32 [2022-11-26 00:41:19,151 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:41:19,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:41:19,152 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:19,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:41:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:41:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-26 00:41:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-11-26 00:41:19,160 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 15 [2022-11-26 00:41:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:19,161 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-11-26 00:41:19,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2022-11-26 00:41:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-11-26 00:41:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:41:19,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:19,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:19,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:19,367 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash -973540485, now seen corresponding path program 3 times [2022-11-26 00:41:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:19,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985374416] [2022-11-26 00:41:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 00:41:19,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:19,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985374416] [2022-11-26 00:41:19,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985374416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:19,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454023012] [2022-11-26 00:41:19,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:41:19,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:19,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:19,465 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:19,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:41:19,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:41:19,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:41:19,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:41:19,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:41:19,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:41:19,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454023012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:19,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130339389] [2022-11-26 00:41:19,653 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:19,653 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:19,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:19,653 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:19,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:19,677 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:41:19,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:41:19,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:19,701 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:41:19,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:41:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:19,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:41:19,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:19,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:19,821 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:41:19,821 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 192 treesize of output 191 [2022-11-26 00:41:19,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-26 00:41:20,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:20,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '794#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:20,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:20,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:20,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 14 [2022-11-26 00:41:20,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103780877] [2022-11-26 00:41:20,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:20,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:41:20,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:20,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:41:20,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:41:20,367 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:20,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:20,569 INFO L93 Difference]: Finished difference Result 65 states and 97 transitions. [2022-11-26 00:41:20,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:41:20,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-26 00:41:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:20,570 INFO L225 Difference]: With dead ends: 65 [2022-11-26 00:41:20,570 INFO L226 Difference]: Without dead ends: 42 [2022-11-26 00:41:20,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:41:20,571 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:20,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:41:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-26 00:41:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-26 00:41:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-11-26 00:41:20,584 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 21 [2022-11-26 00:41:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:20,584 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-11-26 00:41:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:20,585 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-11-26 00:41:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:41:20,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:20,586 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:20,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:20,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:41:20,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:20,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:20,793 INFO L85 PathProgramCache]: Analyzing trace with hash -720959426, now seen corresponding path program 4 times [2022-11-26 00:41:20,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:20,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722562264] [2022-11-26 00:41:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:20,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-26 00:41:21,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:21,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722562264] [2022-11-26 00:41:21,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722562264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:21,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000851785] [2022-11-26 00:41:21,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:41:21,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:21,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:21,080 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:21,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:41:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:41:21,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-26 00:41:21,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-26 00:41:21,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000851785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:21,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656367991] [2022-11-26 00:41:21,493 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:21,493 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:21,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:21,494 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:21,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:21,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:21,521 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:41:21,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:41:21,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:21,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:41:21,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:21,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:41:21,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:21,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:21,640 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:41:21,640 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 192 treesize of output 191 [2022-11-26 00:41:21,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:41:21,884 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:22,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1265#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:22,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:22,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:22,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-26 00:41:22,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882536067] [2022-11-26 00:41:22,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:22,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:41:22,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:22,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:41:22,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:41:22,240 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 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) [2022-11-26 00:41:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:22,537 INFO L93 Difference]: Finished difference Result 201 states and 278 transitions. [2022-11-26 00:41:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:41:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 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 40 [2022-11-26 00:41:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:22,542 INFO L225 Difference]: With dead ends: 201 [2022-11-26 00:41:22,543 INFO L226 Difference]: Without dead ends: 172 [2022-11-26 00:41:22,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:41:22,544 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 459 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:22,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 96 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:41:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-26 00:41:22,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 55. [2022-11-26 00:41:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-11-26 00:41:22,569 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 40 [2022-11-26 00:41:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:22,570 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-11-26 00:41:22,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 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) [2022-11-26 00:41:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-11-26 00:41:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 00:41:22,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:22,571 INFO L195 NwaCegarLoop]: trace histogram [24, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:22,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:22,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:22,778 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:22,778 INFO L85 PathProgramCache]: Analyzing trace with hash -818477541, now seen corresponding path program 5 times [2022-11-26 00:41:22,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:22,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582248062] [2022-11-26 00:41:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:22,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-26 00:41:23,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:23,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582248062] [2022-11-26 00:41:23,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582248062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:23,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268461140] [2022-11-26 00:41:23,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:41:23,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:23,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:23,551 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:23,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:41:23,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:41:23,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:41:23,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:41:23,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-26 00:41:23,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:41:23,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268461140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:23,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:41:23,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [26] total 30 [2022-11-26 00:41:23,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719391401] [2022-11-26 00:41:23,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:23,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:41:23,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:41:23,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:41:23,742 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:23,811 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-11-26 00:41:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:41:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-26 00:41:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:23,813 INFO L225 Difference]: With dead ends: 96 [2022-11-26 00:41:23,813 INFO L226 Difference]: Without dead ends: 89 [2022-11-26 00:41:23,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:41:23,815 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:23,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:41:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-26 00:41:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2022-11-26 00:41:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-11-26 00:41:23,834 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 53 [2022-11-26 00:41:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:23,836 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-11-26 00:41:23,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-11-26 00:41:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-26 00:41:23,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:23,839 INFO L195 NwaCegarLoop]: trace histogram [24, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:23,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:24,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:24,045 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:24,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1546708006, now seen corresponding path program 6 times [2022-11-26 00:41:24,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:24,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787402866] [2022-11-26 00:41:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:24,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-26 00:41:24,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:24,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787402866] [2022-11-26 00:41:24,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787402866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:24,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252655281] [2022-11-26 00:41:24,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:41:24,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:24,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:24,831 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:24,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:41:24,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:41:24,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:41:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:41:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2022-11-26 00:41:25,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2022-11-26 00:41:25,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252655281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:25,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1233128655] [2022-11-26 00:41:25,375 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:25,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:25,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:25,375 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:25,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:25,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:25,398 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:41:25,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:41:25,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:25,421 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:41:25,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:41:25,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:25,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:41:25,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:25,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:25,520 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:41:25,520 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 192 treesize of output 191 [2022-11-26 00:41:25,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:41:25,739 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:26,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2534#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:26,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:26,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:26,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 14] total 39 [2022-11-26 00:41:26,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112187446] [2022-11-26 00:41:26,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:26,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 00:41:26,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:26,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 00:41:26,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=1330, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:41:26,156 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:27,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:27,080 INFO L93 Difference]: Finished difference Result 224 states and 338 transitions. [2022-11-26 00:41:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-26 00:41:27,081 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 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 54 [2022-11-26 00:41:27,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:27,083 INFO L225 Difference]: With dead ends: 224 [2022-11-26 00:41:27,083 INFO L226 Difference]: Without dead ends: 169 [2022-11-26 00:41:27,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1440, Invalid=3530, Unknown=0, NotChecked=0, Total=4970 [2022-11-26 00:41:27,085 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 197 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:27,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 35 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:41:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-26 00:41:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 118. [2022-11-26 00:41:27,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.3418803418803418) internal successors, (157), 117 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2022-11-26 00:41:27,143 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 157 transitions. Word has length 54 [2022-11-26 00:41:27,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:27,143 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 157 transitions. [2022-11-26 00:41:27,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.2051282051282053) internal successors, (86), 39 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 157 transitions. [2022-11-26 00:41:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 00:41:27,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:27,151 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:27,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:27,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:27,357 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash -267468214, now seen corresponding path program 7 times [2022-11-26 00:41:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:27,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454295768] [2022-11-26 00:41:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:27,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-26 00:41:29,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:29,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454295768] [2022-11-26 00:41:29,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454295768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:29,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229864018] [2022-11-26 00:41:29,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:41:29,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:29,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:29,180 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:29,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:41:29,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:29,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-26 00:41:29,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-26 00:41:29,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-26 00:41:31,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229864018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:31,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [168320747] [2022-11-26 00:41:31,415 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:31,415 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:31,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:31,415 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:31,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:31,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:31,444 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:41:31,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:41:31,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:31,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:41:31,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:31,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:41:31,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:31,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:41:31,538 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:41:31,539 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 192 treesize of output 191 [2022-11-26 00:41:31,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:41:31,740 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:32,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4000#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:32,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:32,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:32,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2022-11-26 00:41:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511256155] [2022-11-26 00:41:32,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:32,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-26 00:41:32,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:32,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-26 00:41:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2961, Invalid=4011, Unknown=0, NotChecked=0, Total=6972 [2022-11-26 00:41:32,194 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. Second operand has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:33,558 INFO L93 Difference]: Finished difference Result 655 states and 922 transitions. [2022-11-26 00:41:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-26 00:41:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-26 00:41:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:33,561 INFO L225 Difference]: With dead ends: 655 [2022-11-26 00:41:33,561 INFO L226 Difference]: Without dead ends: 575 [2022-11-26 00:41:33,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2961, Invalid=4011, Unknown=0, NotChecked=0, Total=6972 [2022-11-26 00:41:33,565 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1518 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1518 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:33,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1518 Valid, 252 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:41:33,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-26 00:41:33,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 156. [2022-11-26 00:41:33,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.2580645161290323) internal successors, (195), 155 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 195 transitions. [2022-11-26 00:41:33,617 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 195 transitions. Word has length 116 [2022-11-26 00:41:33,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:33,617 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 195 transitions. [2022-11-26 00:41:33,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:33,618 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 195 transitions. [2022-11-26 00:41:33,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-26 00:41:33,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:33,619 INFO L195 NwaCegarLoop]: trace histogram [74, 35, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:33,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:33,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:41:33,824 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:41:33,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:33,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2007331030, now seen corresponding path program 8 times [2022-11-26 00:41:33,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:41:33,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602120881] [2022-11-26 00:41:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:33,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:41:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-26 00:41:38,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:41:38,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602120881] [2022-11-26 00:41:38,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602120881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:41:38,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429194665] [2022-11-26 00:41:38,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:41:38,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:38,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:38,508 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:38,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:41:38,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:41:38,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:41:38,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:41:38,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 3965 trivial. 0 not checked. [2022-11-26 00:41:38,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4071 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 3965 trivial. 0 not checked. [2022-11-26 00:41:39,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429194665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:39,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [760683332] [2022-11-26 00:41:39,113 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:41:39,113 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:41:39,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:41:39,114 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:41:39,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:41:39,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:39,149 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:41:39,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:41:39,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:39,172 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:41:39,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:41:39,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:39,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:41:39,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:39,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:41:39,247 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:41:39,248 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 202 treesize of output 190 [2022-11-26 00:41:39,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-11-26 00:41:39,402 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:41:40,068 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6424#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:41:40,068 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:41:40,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:41:40,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 6, 6] total 84 [2022-11-26 00:41:40,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246725882] [2022-11-26 00:41:40,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:40,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-26 00:41:40,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:41:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-26 00:41:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3212, Invalid=4978, Unknown=0, NotChecked=0, Total=8190 [2022-11-26 00:41:40,074 INFO L87 Difference]: Start difference. First operand 156 states and 195 transitions. Second operand has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:42:07,935 INFO L93 Difference]: Finished difference Result 4022 states and 6120 transitions. [2022-11-26 00:42:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-26 00:42:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 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 154 [2022-11-26 00:42:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:42:07,951 INFO L225 Difference]: With dead ends: 4022 [2022-11-26 00:42:07,951 INFO L226 Difference]: Without dead ends: 3867 [2022-11-26 00:42:07,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 908 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74532 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=45627, Invalid=168279, Unknown=0, NotChecked=0, Total=213906 [2022-11-26 00:42:07,972 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1931 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 1746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1931 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1746 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:42:07,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1931 Valid, 76 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1746 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:42:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2022-11-26 00:42:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 387. [2022-11-26 00:42:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5932642487046633) internal successors, (615), 386 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 615 transitions. [2022-11-26 00:42:08,338 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 615 transitions. Word has length 154 [2022-11-26 00:42:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:42:08,339 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 615 transitions. [2022-11-26 00:42:08,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 615 transitions. [2022-11-26 00:42:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-11-26 00:42:08,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:42:08,343 INFO L195 NwaCegarLoop]: trace histogram [151, 76, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:42:08,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:42:08,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:42:08,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:42:08,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:42:08,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1046550603, now seen corresponding path program 9 times [2022-11-26 00:42:08,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:42:08,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416456074] [2022-11-26 00:42:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:42:08,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:42:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:42:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 28275 trivial. 0 not checked. [2022-11-26 00:42:15,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:42:15,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416456074] [2022-11-26 00:42:15,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416456074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:42:15,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31642658] [2022-11-26 00:42:15,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:42:15,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:42:15,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:42:15,971 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:42:15,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:42:16,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:42:16,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:42:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 2023 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-26 00:42:16,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:42:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 28045 refuted. 0 times theorem prover too weak. 3156 trivial. 0 not checked. [2022-11-26 00:42:16,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:42:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 31201 backedges. 0 proven. 28045 refuted. 0 times theorem prover too weak. 3156 trivial. 0 not checked. [2022-11-26 00:42:24,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31642658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:42:24,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55337590] [2022-11-26 00:42:24,453 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:42:24,454 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:42:24,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:42:24,454 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:42:24,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:42:24,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:42:24,483 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:42:24,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:42:24,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:42:24,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:42:24,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:42:24,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:42:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:42:24,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:42:24,574 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:42:24,575 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 202 treesize of output 190 [2022-11-26 00:42:24,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:42:24,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:42:25,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18362#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:42:25,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:42:25,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:42:25,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 79, 79] total 156 [2022-11-26 00:42:25,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898218661] [2022-11-26 00:42:25,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:42:25,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-11-26 00:42:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:42:25,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-11-26 00:42:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11972, Invalid=14434, Unknown=0, NotChecked=0, Total=26406 [2022-11-26 00:42:25,474 INFO L87 Difference]: Start difference. First operand 387 states and 615 transitions. Second operand has 156 states, 156 states have (on average 3.4871794871794872) internal successors, (544), 156 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:10,918 INFO L93 Difference]: Finished difference Result 34751 states and 60711 transitions. [2022-11-26 00:43:10,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2022-11-26 00:43:10,919 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 3.4871794871794872) internal successors, (544), 156 states have internal predecessors, (544), 0 states have call successors, (0), 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 385 [2022-11-26 00:43:10,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:11,043 INFO L225 Difference]: With dead ends: 34751 [2022-11-26 00:43:11,043 INFO L226 Difference]: Without dead ends: 34365 [2022-11-26 00:43:11,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1308 GetRequests, 1070 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7751 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=18132, Invalid=39228, Unknown=0, NotChecked=0, Total=57360 [2022-11-26 00:43:11,060 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 287 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:11,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 59 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 00:43:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34365 states. [2022-11-26 00:43:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34365 to 618. [2022-11-26 00:43:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.4959481361426257) internal successors, (923), 617 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 923 transitions. [2022-11-26 00:43:14,360 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 923 transitions. Word has length 385 [2022-11-26 00:43:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:14,360 INFO L495 AbstractCegarLoop]: Abstraction has 618 states and 923 transitions. [2022-11-26 00:43:14,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 3.4871794871794872) internal successors, (544), 156 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 923 transitions. [2022-11-26 00:43:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-11-26 00:43:14,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:14,375 INFO L195 NwaCegarLoop]: trace histogram [153, 152, 152, 151, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:14,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:14,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:14,587 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:43:14,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:14,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1410044638, now seen corresponding path program 10 times [2022-11-26 00:43:14,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:43:14,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586434701] [2022-11-26 00:43:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:43:14,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:43:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-11-26 00:43:36,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:43:36,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586434701] [2022-11-26 00:43:36,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586434701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:43:36,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376299544] [2022-11-26 00:43:36,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:43:36,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:36,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:36,395 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:36,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:43:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:43:37,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 3255 conjuncts, 155 conjunts are in the unsatisfiable core [2022-11-26 00:43:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-11-26 00:43:37,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 69162 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-11-26 00:44:05,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376299544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:05,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911538950] [2022-11-26 00:44:05,594 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:44:05,595 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:44:05,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:44:05,595 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:44:05,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:44:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:05,618 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:44:05,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:44:05,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:05,641 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:44:05,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:44:05,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:05,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:44:05,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:44:05,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:44:05,732 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:44:05,732 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 192 treesize of output 191 [2022-11-26 00:44:05,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:44:05,917 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:44:06,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93168#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:44:06,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:44:06,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:44:06,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155, 155] total 310 [2022-11-26 00:44:06,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163855231] [2022-11-26 00:44:06,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:44:06,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 311 states [2022-11-26 00:44:06,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:44:06,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 311 interpolants. [2022-11-26 00:44:06,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48240, Invalid=52566, Unknown=0, NotChecked=0, Total=100806 [2022-11-26 00:44:06,977 INFO L87 Difference]: Start difference. First operand 618 states and 923 transitions. Second operand has 311 states, 311 states have (on average 1.0321543408360128) internal successors, (321), 310 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:47:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:51,161 INFO L93 Difference]: Finished difference Result 59544 states and 103441 transitions. [2022-11-26 00:47:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 310 states. [2022-11-26 00:47:51,162 INFO L78 Accepts]: Start accepts. Automaton has has 311 states, 311 states have (on average 1.0321543408360128) internal successors, (321), 310 states have internal predecessors, (321), 0 states have call successors, (0), 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 616 [2022-11-26 00:47:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:51,318 INFO L225 Difference]: With dead ends: 59544 [2022-11-26 00:47:51,319 INFO L226 Difference]: Without dead ends: 59081 [2022-11-26 00:47:51,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2001 GetRequests, 1685 SyntacticMatches, 0 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3846 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=48240, Invalid=52566, Unknown=0, NotChecked=0, Total=100806 [2022-11-26 00:47:51,346 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10941 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 1751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10941 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1751 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:51,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10941 Valid, 978 Invalid, 3482 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1751 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:47:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59081 states. [2022-11-26 00:47:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59081 to 773. [2022-11-26 00:47:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.3963730569948187) internal successors, (1078), 772 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:47:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1078 transitions. [2022-11-26 00:47:55,662 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1078 transitions. Word has length 616 [2022-11-26 00:47:55,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:55,663 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 1078 transitions. [2022-11-26 00:47:55,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 311 states, 311 states have (on average 1.0321543408360128) internal successors, (321), 310 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:47:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1078 transitions. [2022-11-26 00:47:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-11-26 00:47:55,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:55,689 INFO L195 NwaCegarLoop]: trace histogram [308, 152, 152, 151, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:55,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:55,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:47:55,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:47:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:55,899 INFO L85 PathProgramCache]: Analyzing trace with hash 847092571, now seen corresponding path program 11 times [2022-11-26 00:47:55,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:55,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716980213] [2022-11-26 00:47:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:55,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 104967 backedges. 0 proven. 47586 refuted. 0 times theorem prover too weak. 57381 trivial. 0 not checked. [2022-11-26 00:49:12,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:12,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716980213] [2022-11-26 00:49:12,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716980213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:12,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805656128] [2022-11-26 00:49:12,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:49:12,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:12,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:12,235 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:12,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80782401-cb2a-49ce-856f-9fbc3b13cc28/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:49:12,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:49:12,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:49:12,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:49:12,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 104967 backedges. 1642 proven. 10 refuted. 0 times theorem prover too weak. 103315 trivial. 0 not checked. [2022-11-26 00:49:13,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:49:15,498 INFO L134 CoverageAnalysis]: Checked inductivity of 104967 backedges. 1642 proven. 10 refuted. 0 times theorem prover too weak. 103315 trivial. 0 not checked. [2022-11-26 00:49:15,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805656128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:49:15,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215294749] [2022-11-26 00:49:15,500 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-26 00:49:15,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:49:15,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:49:15,501 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:49:15,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:49:15,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:15,521 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:49:15,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-26 00:49:15,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:15,541 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:49:15,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-26 00:49:15,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:15,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 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 [2022-11-26 00:49:15,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:15,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:15,611 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-26 00:49:15,611 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 202 treesize of output 190 [2022-11-26 00:49:15,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:49:15,740 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:49:17,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '217961#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~y~0#1| (+ |ULTIMATE.start_main_~x~0#1| 1)) (= (ite (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~r~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~y~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:49:17,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:49:17,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:49:17,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [310, 9, 9] total 324 [2022-11-26 00:49:17,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089397117] [2022-11-26 00:49:17,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:49:17,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 324 states [2022-11-26 00:49:17,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:17,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 324 interpolants. [2022-11-26 00:49:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50174, Invalid=59056, Unknown=0, NotChecked=0, Total=109230 [2022-11-26 00:49:17,650 INFO L87 Difference]: Start difference. First operand 773 states and 1078 transitions. Second operand has 324 states, 324 states have (on average 1.0493827160493827) internal successors, (340), 324 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)