./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/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_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/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_46b91050-4b55-4f4e-a3a8-617afb2c18a6/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 aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:50:06,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:50:06,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:50:06,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:50:06,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:50:06,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:50:06,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:50:06,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:50:06,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:50:06,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:50:06,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:50:06,570 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:50:06,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:50:06,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:50:06,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:50:06,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:50:06,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:50:06,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:50:06,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:50:06,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:50:06,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:50:06,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:50:06,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:50:06,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:50:06,591 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:50:06,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:50:06,592 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:50:06,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:50:06,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:50:06,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:50:06,595 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:50:06,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:50:06,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:50:06,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:50:06,611 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:50:06,611 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:50:06,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:50:06,612 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:50:06,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:50:06,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:50:06,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:50:06,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:50:06,665 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:50:06,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:50:06,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:50:06,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:50:06,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:50:06,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:50:06,668 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:50:06,668 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:50:06,668 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:50:06,668 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:50:06,669 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:50:06,670 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:50:06,670 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:50:06,670 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:50:06,670 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:50:06,670 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:50:06,671 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:50:06,671 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:50:06,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:50:06,672 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:50:06,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:50:06,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:50:06,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:50:06,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:50:06,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:50:06,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:50:06,674 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:50:06,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:50:06,675 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:50:06,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:50:06,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:50:06,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:50:06,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:50:06,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:50:06,676 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:50:06,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:50:06,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:50:06,677 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:50:06,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:50:06,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:50:06,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:50:06,678 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_46b91050-4b55-4f4e-a3a8-617afb2c18a6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec2f9127d2f09ac657db5f4ff454a031f6027c12ee4edfdaac8d9dd392f7955 [2022-11-25 23:50:06,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:50:07,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:50:07,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:50:07,025 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:50:07,026 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:50:07,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-crafted/zero_sum_const_m4.c [2022-11-25 23:50:10,157 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:50:10,399 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:50:10,400 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c [2022-11-25 23:50:10,408 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/data/bde198ccc/e3349d9b21bc40e49e0b7b7679a7414c/FLAG7031cf7a2 [2022-11-25 23:50:10,427 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/data/bde198ccc/e3349d9b21bc40e49e0b7b7679a7414c [2022-11-25 23:50:10,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:50:10,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:50:10,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:50:10,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:50:10,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:50:10,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e0b97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10, skipping insertion in model container [2022-11-25 23:50:10,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:50:10,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:50:10,695 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_46b91050-4b55-4f4e-a3a8-617afb2c18a6/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c[408,421] [2022-11-25 23:50:10,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:50:10,749 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:50:10,764 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_46b91050-4b55-4f4e-a3a8-617afb2c18a6/sv-benchmarks/c/array-crafted/zero_sum_const_m4.c[408,421] [2022-11-25 23:50:10,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:50:10,810 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:50:10,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10 WrapperNode [2022-11-25 23:50:10,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:50:10,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:50:10,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:50:10,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:50:10,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,873 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 126 [2022-11-25 23:50:10,874 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:50:10,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:50:10,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:50:10,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:50:10,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,919 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:50:10,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:50:10,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:50:10,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:50:10,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (1/1) ... [2022-11-25 23:50:10,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:50:10,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:10,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:50:10,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:50:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:50:11,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:50:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 23:50:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:50:11,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:50:11,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:50:11,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:50:11,089 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:50:11,092 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:50:11,329 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:50:11,406 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:50:11,407 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-25 23:50:11,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:50:11 BoogieIcfgContainer [2022-11-25 23:50:11,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:50:11,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:50:11,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:50:11,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:50:11,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:50:10" (1/3) ... [2022-11-25 23:50:11,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1437f3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:50:11, skipping insertion in model container [2022-11-25 23:50:11,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:50:10" (2/3) ... [2022-11-25 23:50:11,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1437f3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:50:11, skipping insertion in model container [2022-11-25 23:50:11,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:50:11" (3/3) ... [2022-11-25 23:50:11,428 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2022-11-25 23:50:11,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:50:11,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:50:11,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:50:11,555 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;@70fc6fb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:50:11,555 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:50:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:50:11,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:11,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:11,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:11,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2021895563, now seen corresponding path program 1 times [2022-11-25 23:50:11,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:11,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487488588] [2022-11-25 23:50:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:11,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:11,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:11,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487488588] [2022-11-25 23:50:11,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487488588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:50:11,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:50:11,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:50:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948759476] [2022-11-25 23:50:11,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:50:11,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:50:11,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:50:11,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:50:11,885 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8) internal successors, (27), 16 states have internal predecessors, (27), 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 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:11,983 INFO L93 Difference]: Finished difference Result 32 states and 51 transitions. [2022-11-25 23:50:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:50:11,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:50:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:11,995 INFO L225 Difference]: With dead ends: 32 [2022-11-25 23:50:11,996 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 23:50:11,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:50:12,005 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:12,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:50:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 23:50:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 23:50:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2022-11-25 23:50:12,067 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 13 [2022-11-25 23:50:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:12,068 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2022-11-25 23:50:12,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2022-11-25 23:50:12,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:50:12,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:12,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:12,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:50:12,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:12,077 INFO L85 PathProgramCache]: Analyzing trace with hash 688320013, now seen corresponding path program 1 times [2022-11-25 23:50:12,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:12,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93903201] [2022-11-25 23:50:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:12,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:50:12,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:12,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93903201] [2022-11-25 23:50:12,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93903201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:50:12,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:50:12,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:50:12,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996584212] [2022-11-25 23:50:12,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:50:12,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:50:12,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:12,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:50:12,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:50:12,285 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-25 23:50:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:12,359 INFO L93 Difference]: Finished difference Result 33 states and 55 transitions. [2022-11-25 23:50:12,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:50:12,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 14 [2022-11-25 23:50:12,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:12,361 INFO L225 Difference]: With dead ends: 33 [2022-11-25 23:50:12,361 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 23:50:12,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:50:12,363 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:12,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 5 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:50:12,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 23:50:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-25 23:50:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-11-25 23:50:12,370 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2022-11-25 23:50:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:12,371 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-11-25 23:50:12,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-25 23:50:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-11-25 23:50:12,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 23:50:12,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:12,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:12,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:50:12,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash -628182144, now seen corresponding path program 1 times [2022-11-25 23:50:12,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:12,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094180283] [2022-11-25 23:50:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:12,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:50:12,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:12,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094180283] [2022-11-25 23:50:12,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094180283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:12,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835609426] [2022-11-25 23:50:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:12,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:12,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:12,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:12,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:50:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:12,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:50:12,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:50:12,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:50:12,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835609426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:12,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184270868] [2022-11-25 23:50:12,908 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:50:12,908 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:12,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:12,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:12,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:13,099 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:50:13,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:50:13,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:50:13,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:50:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:13,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:50:13,320 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:50:13,321 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 245 treesize of output 248 [2022-11-25 23:50:13,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:50:13,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:14,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '336#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:50:14,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:14,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:50:14,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 23:50:14,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50019064] [2022-11-25 23:50:14,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:14,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:50:14,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:50:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:50:14,189 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:14,263 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2022-11-25 23:50:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:50:14,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 22 [2022-11-25 23:50:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:14,264 INFO L225 Difference]: With dead ends: 43 [2022-11-25 23:50:14,264 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 23:50:14,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:50:14,266 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:14,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:50:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 23:50:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-25 23:50:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-25 23:50:14,272 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 22 [2022-11-25 23:50:14,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:14,272 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-25 23:50:14,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:14,273 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-25 23:50:14,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 23:50:14,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:14,274 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:14,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:14,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 23:50:14,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:14,481 INFO L85 PathProgramCache]: Analyzing trace with hash -681729304, now seen corresponding path program 2 times [2022-11-25 23:50:14,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:14,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532794861] [2022-11-25 23:50:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:14,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:50:14,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:14,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532794861] [2022-11-25 23:50:14,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532794861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:14,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973722952] [2022-11-25 23:50:14,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:50:14,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:14,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:14,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:14,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:50:14,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:50:14,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:14,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:50:14,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:50:14,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:50:14,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973722952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:14,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [336165193] [2022-11-25 23:50:14,777 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:50:14,777 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:14,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:14,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:14,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:14,871 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:50:14,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:50:14,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:50:14,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:50:15,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:15,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:50:15,043 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:50:15,044 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 245 treesize of output 248 [2022-11-25 23:50:15,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:50:15,451 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:15,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '602#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:50:15,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:15,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:50:15,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 23:50:15,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812204842] [2022-11-25 23:50:15,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:15,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:50:15,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:15,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:50:15,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:50:15,699 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2022-11-25 23:50:15,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:15,800 INFO L93 Difference]: Finished difference Result 49 states and 71 transitions. [2022-11-25 23:50:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:50:15,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 23 [2022-11-25 23:50:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:15,801 INFO L225 Difference]: With dead ends: 49 [2022-11-25 23:50:15,801 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 23:50:15,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:50:15,803 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:15,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 5 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:50:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 23:50:15,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-25 23:50:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 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) [2022-11-25 23:50:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-25 23:50:15,809 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 23 [2022-11-25 23:50:15,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:15,809 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-25 23:50:15,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2022-11-25 23:50:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-25 23:50:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 23:50:15,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:15,811 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:15,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 23:50:16,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:16,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:16,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1504251819, now seen corresponding path program 3 times [2022-11-25 23:50:16,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:16,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831157447] [2022-11-25 23:50:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:16,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:19,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:19,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831157447] [2022-11-25 23:50:19,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831157447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:19,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806916082] [2022-11-25 23:50:19,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:50:19,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:19,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:19,897 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:19,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:50:19,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:50:19,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:19,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-25 23:50:19,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:50:21,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:23,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:50:23,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-11-25 23:50:23,287 INFO L321 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2022-11-25 23:50:23,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2022-11-25 23:50:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:23,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806916082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:23,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1868033674] [2022-11-25 23:50:23,579 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:50:23,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:23,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:23,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:23,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:23,637 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:50:23,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:50:23,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:50:23,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:50:23,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:23,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:50:23,804 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:50:23,805 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 245 treesize of output 248 [2022-11-25 23:50:23,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:50:24,146 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:24,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1003#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:50:24,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:24,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:50:24,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 27] total 67 [2022-11-25 23:50:24,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858448846] [2022-11-25 23:50:24,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:24,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-25 23:50:24,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:24,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-25 23:50:24,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=4831, Unknown=0, NotChecked=0, Total=5112 [2022-11-25 23:50:24,797 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 67 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 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) [2022-11-25 23:50:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:27,453 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-11-25 23:50:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 23:50:27,455 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 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 31 [2022-11-25 23:50:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:27,456 INFO L225 Difference]: With dead ends: 57 [2022-11-25 23:50:27,456 INFO L226 Difference]: Without dead ends: 54 [2022-11-25 23:50:27,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=448, Invalid=7742, Unknown=0, NotChecked=0, Total=8190 [2022-11-25 23:50:27,460 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:27,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 67 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:50:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-25 23:50:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-11-25 23:50:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-11-25 23:50:27,473 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 31 [2022-11-25 23:50:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:27,473 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-11-25 23:50:27,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 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) [2022-11-25 23:50:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-11-25 23:50:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 23:50:27,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:27,476 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:27,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 23:50:27,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:27,679 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2090822180, now seen corresponding path program 4 times [2022-11-25 23:50:27,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:27,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67878682] [2022-11-25 23:50:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:50:27,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:27,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67878682] [2022-11-25 23:50:27,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67878682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:27,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824589066] [2022-11-25 23:50:27,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:50:27,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:27,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:27,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:27,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:50:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:27,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:50:27,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:50:27,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:50:28,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824589066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:28,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923075506] [2022-11-25 23:50:28,010 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:50:28,010 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:28,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:28,011 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:28,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:28,071 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:50:28,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:50:28,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:50:28,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:50:28,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:28,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:50:28,188 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:50:28,188 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 245 treesize of output 248 [2022-11-25 23:50:28,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:50:28,509 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:28,742 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1451#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:50:28,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:28,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:50:28,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-25 23:50:28,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706735196] [2022-11-25 23:50:28,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:28,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:50:28,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:28,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:50:28,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:50:28,744 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:29,025 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2022-11-25 23:50:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:50:29,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-25 23:50:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:29,026 INFO L225 Difference]: With dead ends: 114 [2022-11-25 23:50:29,026 INFO L226 Difference]: Without dead ends: 65 [2022-11-25 23:50:29,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:50:29,028 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:29,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 17 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:50:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-25 23:50:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2022-11-25 23:50:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2022-11-25 23:50:29,039 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 32 [2022-11-25 23:50:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:29,040 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2022-11-25 23:50:29,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2022-11-25 23:50:29,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 23:50:29,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:29,041 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:29,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:29,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:29,247 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash 293731444, now seen corresponding path program 5 times [2022-11-25 23:50:29,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:29,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967824035] [2022-11-25 23:50:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:29,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:50:29,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:29,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967824035] [2022-11-25 23:50:29,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967824035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:29,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207918548] [2022-11-25 23:50:29,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:50:29,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:29,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:29,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:29,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:50:29,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:50:29,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:29,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:50:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:50:29,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:50:29,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207918548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:29,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1093524423] [2022-11-25 23:50:29,623 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:50:29,623 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:29,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:29,624 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:29,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:29,681 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:50:29,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:50:29,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:50:29,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:50:29,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:29,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:29,785 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:50:29,785 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 250 treesize of output 247 [2022-11-25 23:50:29,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:50:30,109 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:30,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1993#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:50:30,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:30,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:50:30,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-25 23:50:30,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914461791] [2022-11-25 23:50:30,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:30,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 23:50:30,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:30,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 23:50:30,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:50:30,354 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:30,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:30,580 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2022-11-25 23:50:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:50:30,581 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-25 23:50:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:30,582 INFO L225 Difference]: With dead ends: 62 [2022-11-25 23:50:30,582 INFO L226 Difference]: Without dead ends: 41 [2022-11-25 23:50:30,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:50:30,584 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:30,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 13 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:50:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-25 23:50:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-25 23:50:30,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.225) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-25 23:50:30,592 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-11-25 23:50:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:30,592 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-25 23:50:30,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-25 23:50:30,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 23:50:30,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:30,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:30,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:30,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:30,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:30,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:30,795 INFO L85 PathProgramCache]: Analyzing trace with hash 487958048, now seen corresponding path program 6 times [2022-11-25 23:50:30,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:50:30,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325865239] [2022-11-25 23:50:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:30,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:50:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:37,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:50:37,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325865239] [2022-11-25 23:50:37,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325865239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:50:37,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173674999] [2022-11-25 23:50:37,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:50:37,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:37,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:37,343 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:37,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:50:37,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:50:37,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:37,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-25 23:50:37,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:50:39,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:44,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:50:44,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 108 [2022-11-25 23:50:44,318 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-25 23:50:44,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 23 [2022-11-25 23:50:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:50:44,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173674999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954368190] [2022-11-25 23:50:44,747 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:50:44,748 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:50:44,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:50:44,748 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:50:44,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:50:44,816 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:50:44,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:50:44,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:50:44,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:50:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:50:44,920 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:50:44,921 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 250 treesize of output 247 [2022-11-25 23:50:44,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:50:45,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:50:46,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2533#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:50:46,022 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:50:46,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:50:46,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 32, 35] total 98 [2022-11-25 23:50:46,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641201862] [2022-11-25 23:50:46,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:46,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-25 23:50:46,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:50:46,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-25 23:50:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=10067, Unknown=0, NotChecked=0, Total=10506 [2022-11-25 23:50:46,026 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:02,056 INFO L93 Difference]: Finished difference Result 183 states and 227 transitions. [2022-11-25 23:51:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-25 23:51:02,057 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-25 23:51:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:02,059 INFO L225 Difference]: With dead ends: 183 [2022-11-25 23:51:02,060 INFO L226 Difference]: Without dead ends: 149 [2022-11-25 23:51:02,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5372 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=1486, Invalid=24920, Unknown=0, NotChecked=0, Total=26406 [2022-11-25 23:51:02,066 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4116 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 4513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 4116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:02,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 115 Invalid, 4513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 4116 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-25 23:51:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-25 23:51:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 76. [2022-11-25 23:51:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.24) internal successors, (93), 75 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-11-25 23:51:02,094 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 40 [2022-11-25 23:51:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:02,095 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-11-25 23:51:02,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.153061224489796) internal successors, (113), 98 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-11-25 23:51:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 23:51:02,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:02,096 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:02,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:02,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 23:51:02,302 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:02,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1521946181, now seen corresponding path program 7 times [2022-11-25 23:51:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:02,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420747364] [2022-11-25 23:51:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:02,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 23:51:02,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:02,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420747364] [2022-11-25 23:51:02,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420747364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:02,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541592562] [2022-11-25 23:51:02,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:51:02,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:02,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:02,455 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:02,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:51:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:02,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:51:02,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 23:51:02,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 23:51:02,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541592562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:02,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709669864] [2022-11-25 23:51:02,737 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:51:02,738 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:02,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:02,738 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:02,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:02,793 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-25 23:51:02,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-25 23:51:02,850 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:51:02,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:51:02,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:51:02,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:02,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:51:02,951 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:51:02,952 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 245 treesize of output 248 [2022-11-25 23:51:03,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:51:03,181 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:03,468 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3418#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:51:03,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:03,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:51:03,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-25 23:51:03,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279550414] [2022-11-25 23:51:03,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:03,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:51:03,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:51:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:51:03,474 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:03,818 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2022-11-25 23:51:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:51:03,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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 41 [2022-11-25 23:51:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:03,819 INFO L225 Difference]: With dead ends: 166 [2022-11-25 23:51:03,819 INFO L226 Difference]: Without dead ends: 80 [2022-11-25 23:51:03,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:51:03,820 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:03,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:51:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-25 23:51:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-11-25 23:51:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 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) [2022-11-25 23:51:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-11-25 23:51:03,853 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 41 [2022-11-25 23:51:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:03,853 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-11-25 23:51:03,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:03,854 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-11-25 23:51:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 23:51:03,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:03,861 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:03,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:04,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 23:51:04,067 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:04,068 INFO L85 PathProgramCache]: Analyzing trace with hash 96542015, now seen corresponding path program 8 times [2022-11-25 23:51:04,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:04,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451364467] [2022-11-25 23:51:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:04,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-25 23:51:04,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:04,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451364467] [2022-11-25 23:51:04,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451364467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497566337] [2022-11-25 23:51:04,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:51:04,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:04,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:04,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:04,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:51:04,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:51:04,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:04,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:51:04,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-25 23:51:04,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:04,525 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-25 23:51:04,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497566337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:04,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686388086] [2022-11-25 23:51:04,527 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:51:04,527 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:04,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:04,528 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:04,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:04,587 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-25 23:51:04,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-25 23:51:04,641 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:51:04,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:51:04,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:51:04,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:04,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:51:04,738 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:51:04,739 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 245 treesize of output 248 [2022-11-25 23:51:04,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:51:04,979 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:05,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4153#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:51:05,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:05,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:51:05,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-25 23:51:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959619961] [2022-11-25 23:51:05,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:05,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:51:05,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:51:05,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:51:05,244 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:05,536 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2022-11-25 23:51:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:51:05,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-25 23:51:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:05,537 INFO L225 Difference]: With dead ends: 77 [2022-11-25 23:51:05,538 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 23:51:05,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:51:05,539 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:05,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 13 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:51:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 23:51:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-25 23:51:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-11-25 23:51:05,559 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 42 [2022-11-25 23:51:05,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:05,559 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-11-25 23:51:05,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:05,559 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-11-25 23:51:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 23:51:05,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:05,560 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:05,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:05,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:05,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:05,763 INFO L85 PathProgramCache]: Analyzing trace with hash 174183989, now seen corresponding path program 9 times [2022-11-25 23:51:05,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:05,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347778814] [2022-11-25 23:51:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:05,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:14,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:14,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347778814] [2022-11-25 23:51:14,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347778814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:14,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686009076] [2022-11-25 23:51:14,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:51:14,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:14,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:14,182 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:14,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:51:14,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:51:14,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:14,293 WARN L261 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-25 23:51:14,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:51:18,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:25,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:51:25,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 69 treesize of output 185 [2022-11-25 23:51:25,963 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-11-25 23:51:25,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 70 treesize of output 30 [2022-11-25 23:51:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:51:26,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686009076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:26,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1611341766] [2022-11-25 23:51:26,122 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:51:26,122 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:26,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:26,123 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:26,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:26,180 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-25 23:51:26,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-25 23:51:26,249 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:51:26,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:51:26,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:51:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:51:26,368 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:51:26,368 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 245 treesize of output 248 [2022-11-25 23:51:26,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:51:26,659 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:27,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4817#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:51:27,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:27,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:51:27,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 38, 40] total 118 [2022-11-25 23:51:27,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654653116] [2022-11-25 23:51:27,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:27,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-11-25 23:51:27,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-11-25 23:51:27,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=14612, Unknown=0, NotChecked=0, Total=15006 [2022-11-25 23:51:27,797 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:54,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:54,178 INFO L93 Difference]: Finished difference Result 203 states and 246 transitions. [2022-11-25 23:51:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-25 23:51:54,179 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-25 23:51:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:54,180 INFO L225 Difference]: With dead ends: 203 [2022-11-25 23:51:54,180 INFO L226 Difference]: Without dead ends: 163 [2022-11-25 23:51:54,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7291 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=1598, Invalid=35074, Unknown=0, NotChecked=0, Total=36672 [2022-11-25 23:51:54,185 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 159 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 6610 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 7466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 6610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:54,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 272 Invalid, 7466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 6610 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-25 23:51:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-25 23:51:54,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2022-11-25 23:51:54,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 112 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2022-11-25 23:51:54,239 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 49 [2022-11-25 23:51:54,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:54,239 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2022-11-25 23:51:54,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.1440677966101696) internal successors, (135), 118 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2022-11-25 23:51:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 23:51:54,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:54,240 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:54,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:54,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:54,446 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:54,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:54,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1104441410, now seen corresponding path program 10 times [2022-11-25 23:51:54,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:54,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821839000] [2022-11-25 23:51:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:54,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-25 23:51:54,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:54,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821839000] [2022-11-25 23:51:54,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821839000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407700080] [2022-11-25 23:51:54,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:51:54,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:54,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:54,667 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:54,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:51:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:54,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:51:54,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:54,915 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-25 23:51:54,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-25 23:51:55,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407700080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:55,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1296774120] [2022-11-25 23:51:55,045 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:51:55,045 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:55,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:55,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:55,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:55,107 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:51:55,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:51:55,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:51:55,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:51:55,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:55,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:55,224 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:51:55,225 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 250 treesize of output 247 [2022-11-25 23:51:55,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:51:55,458 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:55,709 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5886#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:51:55,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:55,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:51:55,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-25 23:51:55,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340298388] [2022-11-25 23:51:55,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:55,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:51:55,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:55,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:51:55,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:51:55,712 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:56,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:56,107 INFO L93 Difference]: Finished difference Result 197 states and 234 transitions. [2022-11-25 23:51:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:51:56,108 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 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 50 [2022-11-25 23:51:56,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:56,108 INFO L225 Difference]: With dead ends: 197 [2022-11-25 23:51:56,109 INFO L226 Difference]: Without dead ends: 62 [2022-11-25 23:51:56,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:51:56,110 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:56,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:51:56,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-25 23:51:56,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-11-25 23:51:56,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:56,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-11-25 23:51:56,139 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 50 [2022-11-25 23:51:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:56,140 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-11-25 23:51:56,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:56,140 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-11-25 23:51:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-25 23:51:56,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:56,141 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:56,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:56,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 23:51:56,346 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:56,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1743933961, now seen corresponding path program 11 times [2022-11-25 23:51:56,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:56,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194342902] [2022-11-25 23:51:56,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:56,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-25 23:51:56,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:51:56,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194342902] [2022-11-25 23:51:56,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194342902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:51:56,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260182740] [2022-11-25 23:51:56,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:51:56,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:56,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:56,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:56,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:51:56,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:51:56,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:56,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:51:56,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-25 23:51:56,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-25 23:51:56,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260182740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609630507] [2022-11-25 23:51:56,967 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:51:56,968 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:51:56,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:51:56,968 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:51:56,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:51:57,021 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-25 23:51:57,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-25 23:51:57,076 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:51:57,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:51:57,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:51:57,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:51:57,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:51:57,179 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:51:57,180 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 245 treesize of output 248 [2022-11-25 23:51:57,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:51:57,466 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:51:57,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6751#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:51:57,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:51:57,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:51:57,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-11-25 23:51:57,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951821262] [2022-11-25 23:51:57,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:57,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:51:57,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:51:57,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:51:57,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:51:57,713 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:58,059 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-11-25 23:51:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 23:51:58,059 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 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 57 [2022-11-25 23:51:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:58,060 INFO L225 Difference]: With dead ends: 62 [2022-11-25 23:51:58,060 INFO L226 Difference]: Without dead ends: 59 [2022-11-25 23:51:58,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 154 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:51:58,061 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:58,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:51:58,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-25 23:51:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-25 23:51:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-11-25 23:51:58,093 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 57 [2022-11-25 23:51:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:58,094 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-11-25 23:51:58,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-11-25 23:51:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 23:51:58,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:58,095 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:58,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:58,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 23:51:58,295 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1772327104, now seen corresponding path program 12 times [2022-11-25 23:51:58,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:51:58,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066993725] [2022-11-25 23:51:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:51:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 2 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:52:09,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:52:09,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066993725] [2022-11-25 23:52:09,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066993725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:52:09,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484233214] [2022-11-25 23:52:09,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:52:09,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:09,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:09,111 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:09,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:52:09,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:52:09,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:52:09,233 WARN L261 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 172 conjunts are in the unsatisfiable core [2022-11-25 23:52:09,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:09,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:52:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 23:52:15,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 23:52:26,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484233214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:26,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556919413] [2022-11-25 23:52:26,739 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:52:26,739 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:52:26,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:52:26,739 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:52:26,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:52:26,792 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-25 23:52:26,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-25 23:52:26,844 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:52:26,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:52:26,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:52:26,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:52:26,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:52:26,962 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:52:26,962 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 245 treesize of output 248 [2022-11-25 23:52:27,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:52:27,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:52:28,468 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7489#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:52:28,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:52:28,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:52:28,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 46, 48] total 143 [2022-11-25 23:52:28,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854206682] [2022-11-25 23:52:28,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:28,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-11-25 23:52:28,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:52:28,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-11-25 23:52:28,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=21239, Unknown=0, NotChecked=0, Total=21756 [2022-11-25 23:52:28,472 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 143 states, 143 states have (on average 1.118881118881119) internal successors, (160), 143 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:04,256 INFO L93 Difference]: Finished difference Result 213 states and 250 transitions. [2022-11-25 23:53:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-25 23:53:04,257 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.118881118881119) internal successors, (160), 143 states have internal predecessors, (160), 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 58 [2022-11-25 23:53:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:04,258 INFO L225 Difference]: With dead ends: 213 [2022-11-25 23:53:04,258 INFO L226 Difference]: Without dead ends: 166 [2022-11-25 23:53:04,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10896 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=1919, Invalid=48931, Unknown=0, NotChecked=0, Total=50850 [2022-11-25 23:53:04,263 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 101 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 8023 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 8023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:04,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 181 Invalid, 8617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 8023 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-25 23:53:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-25 23:53:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2022-11-25 23:53:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1531531531531531) internal successors, (128), 111 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2022-11-25 23:53:04,330 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 58 [2022-11-25 23:53:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:04,330 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2022-11-25 23:53:04,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.118881118881119) internal successors, (160), 143 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2022-11-25 23:53:04,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 23:53:04,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:04,331 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:53:04,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:04,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:04,538 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:53:04,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:04,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1416019557, now seen corresponding path program 13 times [2022-11-25 23:53:04,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:53:04,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315363909] [2022-11-25 23:53:04,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:04,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:53:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-25 23:53:04,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:53:04,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315363909] [2022-11-25 23:53:04,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315363909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:53:04,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168908046] [2022-11-25 23:53:04,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:53:04,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:04,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:04,775 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:53:04,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:53:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:53:04,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-25 23:53:05,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-25 23:53:05,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168908046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173410196] [2022-11-25 23:53:05,159 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:53:05,159 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:53:05,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:53:05,160 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:53:05,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:53:05,217 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:53:05,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:53:05,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:53:05,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:53:05,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:05,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:05,311 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:53:05,311 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 250 treesize of output 247 [2022-11-25 23:53:05,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:53:05,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:53:05,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8654#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:53:05,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:53:05,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:53:05,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-25 23:53:05,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217599318] [2022-11-25 23:53:05,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:53:05,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:53:05,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:53:05,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:53:05,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:53:05,788 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:06,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:06,287 INFO L93 Difference]: Finished difference Result 200 states and 231 transitions. [2022-11-25 23:53:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 23:53:06,287 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-25 23:53:06,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:06,288 INFO L225 Difference]: With dead ends: 200 [2022-11-25 23:53:06,288 INFO L226 Difference]: Without dead ends: 92 [2022-11-25 23:53:06,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 152 SyntacticMatches, 12 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=884, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:53:06,289 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:06,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 21 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:53:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-25 23:53:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2022-11-25 23:53:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2022-11-25 23:53:06,334 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 59 [2022-11-25 23:53:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:06,334 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2022-11-25 23:53:06,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2022-11-25 23:53:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 23:53:06,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:06,335 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:53:06,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:06,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 23:53:06,539 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:53:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:06,539 INFO L85 PathProgramCache]: Analyzing trace with hash -894983387, now seen corresponding path program 14 times [2022-11-25 23:53:06,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:53:06,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70308365] [2022-11-25 23:53:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:06,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:53:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-25 23:53:06,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:53:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70308365] [2022-11-25 23:53:06,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70308365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:53:06,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746714354] [2022-11-25 23:53:06,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:53:06,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:06,795 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:53:06,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 23:53:06,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:53:06,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:53:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:53:06,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-25 23:53:07,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-11-25 23:53:07,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746714354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:07,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1275491401] [2022-11-25 23:53:07,194 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:53:07,194 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:53:07,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:53:07,195 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:53:07,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:53:07,252 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-25 23:53:07,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-25 23:53:07,309 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:53:07,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:53:07,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:53:07,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:07,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:07,405 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:53:07,405 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 250 treesize of output 247 [2022-11-25 23:53:07,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:53:07,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:53:07,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9617#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:53:07,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:53:07,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:53:07,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-11-25 23:53:07,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592770069] [2022-11-25 23:53:07,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:53:07,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:53:07,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:53:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:53:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:53:07,915 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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) [2022-11-25 23:53:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:08,343 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-11-25 23:53:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:53:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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) Word has length 63 [2022-11-25 23:53:08,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:08,344 INFO L225 Difference]: With dead ends: 89 [2022-11-25 23:53:08,344 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 23:53:08,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 170 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:53:08,345 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:08,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 13 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:53:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 23:53:08,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-25 23:53:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 67 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:53:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-11-25 23:53:08,373 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 63 [2022-11-25 23:53:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:08,374 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-11-25 23:53:08,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 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) [2022-11-25 23:53:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-11-25 23:53:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-25 23:53:08,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:08,375 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:53:08,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:08,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 23:53:08,581 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:53:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1455883285, now seen corresponding path program 15 times [2022-11-25 23:53:08,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:53:08,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948418471] [2022-11-25 23:53:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:53:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 7 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:53:23,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:53:23,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948418471] [2022-11-25 23:53:23,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948418471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:53:23,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649200299] [2022-11-25 23:53:23,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:53:23,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:23,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:23,599 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:53:23,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 23:53:23,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:53:23,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:53:23,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 208 conjunts are in the unsatisfiable core [2022-11-25 23:53:23,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 168 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 23:53:32,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:44,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:53:44,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 104 treesize of output 408 [2022-11-25 23:53:50,286 INFO L321 Elim1Store]: treesize reduction 366, result has 6.4 percent of original size [2022-11-25 23:53:50,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 103 treesize of output 41 [2022-11-25 23:53:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 23:53:50,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649200299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:50,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347775816] [2022-11-25 23:53:50,705 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:53:50,706 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:53:50,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:53:50,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:53:50,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:53:50,767 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:53:50,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:53:50,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:53:50,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:53:50,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:53:50,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:53:50,871 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:53:50,871 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 245 treesize of output 248 [2022-11-25 23:53:50,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:53:51,126 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:53:52,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10513#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:53:52,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:53:52,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:53:52,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 56, 58] total 172 [2022-11-25 23:53:52,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402140472] [2022-11-25 23:53:52,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:53:52,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2022-11-25 23:53:52,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:53:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2022-11-25 23:53:52,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=30255, Unknown=0, NotChecked=0, Total=31152 [2022-11-25 23:53:52,358 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 172 states, 172 states have (on average 1.0872093023255813) internal successors, (187), 172 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:45,881 INFO L93 Difference]: Finished difference Result 330 states and 381 transitions. [2022-11-25 23:54:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-11-25 23:54:45,882 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 1.0872093023255813) internal successors, (187), 172 states have internal predecessors, (187), 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 67 [2022-11-25 23:54:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:45,883 INFO L225 Difference]: With dead ends: 330 [2022-11-25 23:54:45,884 INFO L226 Difference]: Without dead ends: 276 [2022-11-25 23:54:45,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23865 ImplicationChecksByTransitivity, 67.8s TimeCoverageRelationStatistics Valid=3494, Invalid=75748, Unknown=0, NotChecked=0, Total=79242 [2022-11-25 23:54:45,889 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 112 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 10560 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 11603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 10560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:45,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 175 Invalid, 11603 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1043 Valid, 10560 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2022-11-25 23:54:45,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-25 23:54:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 161. [2022-11-25 23:54:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.15) internal successors, (184), 160 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 184 transitions. [2022-11-25 23:54:45,991 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 184 transitions. Word has length 67 [2022-11-25 23:54:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:45,991 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 184 transitions. [2022-11-25 23:54:45,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 172 states have (on average 1.0872093023255813) internal successors, (187), 172 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:45,992 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 184 transitions. [2022-11-25 23:54:45,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 23:54:45,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:45,993 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:46,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:46,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:46,201 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash 357112902, now seen corresponding path program 16 times [2022-11-25 23:54:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:46,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530677604] [2022-11-25 23:54:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:46,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:46,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-25 23:54:46,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:54:46,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530677604] [2022-11-25 23:54:46,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530677604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:54:46,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16165890] [2022-11-25 23:54:46,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:54:46,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:46,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:46,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:46,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 23:54:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:46,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:54:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-25 23:54:46,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-25 23:54:47,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16165890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408014546] [2022-11-25 23:54:47,007 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:54:47,007 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:54:47,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:54:47,007 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:54:47,007 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:54:47,073 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:54:47,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:54:47,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:54:47,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:54:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:47,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:54:47,184 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:54:47,184 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 245 treesize of output 248 [2022-11-25 23:54:47,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:54:47,413 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:54:47,703 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12121#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:54:47,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:54:47,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:54:47,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-11-25 23:54:47,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673579948] [2022-11-25 23:54:47,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:47,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 23:54:47,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 23:54:47,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:54:47,704 INFO L87 Difference]: Start difference. First operand 161 states and 184 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:48,460 INFO L93 Difference]: Finished difference Result 291 states and 334 transitions. [2022-11-25 23:54:48,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:54:48,461 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 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 68 [2022-11-25 23:54:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:48,462 INFO L225 Difference]: With dead ends: 291 [2022-11-25 23:54:48,462 INFO L226 Difference]: Without dead ends: 149 [2022-11-25 23:54:48,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 176 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:54:48,463 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:48,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:54:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-25 23:54:48,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2022-11-25 23:54:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.127659574468085) internal successors, (159), 141 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 159 transitions. [2022-11-25 23:54:48,562 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 159 transitions. Word has length 68 [2022-11-25 23:54:48,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:48,563 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 159 transitions. [2022-11-25 23:54:48,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:48,563 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 159 transitions. [2022-11-25 23:54:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 23:54:48,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:48,564 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:48,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:48,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 23:54:48,764 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:48,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1840229324, now seen corresponding path program 17 times [2022-11-25 23:54:48,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:48,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068694510] [2022-11-25 23:54:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:48,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-25 23:54:49,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:54:49,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068694510] [2022-11-25 23:54:49,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068694510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:54:49,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532909824] [2022-11-25 23:54:49,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:54:49,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:49,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:49,039 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:49,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 23:54:49,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 23:54:49,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:54:49,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:54:49,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-25 23:54:49,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-25 23:54:49,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532909824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:49,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [195441523] [2022-11-25 23:54:49,536 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:54:49,536 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:54:49,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:54:49,536 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:54:49,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:54:49,591 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:54:49,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:54:49,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:54:49,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:54:49,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:54:49,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:54:49,689 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:54:49,689 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 245 treesize of output 248 [2022-11-25 23:54:49,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:54:49,975 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:54:50,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13421#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:54:50,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:54:50,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:54:50,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-11-25 23:54:50,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307035954] [2022-11-25 23:54:50,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:50,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 23:54:50,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:54:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 23:54:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:54:50,220 INFO L87 Difference]: Start difference. First operand 142 states and 159 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-11-25 23:54:50,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:50,788 INFO L93 Difference]: Finished difference Result 146 states and 163 transitions. [2022-11-25 23:54:50,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:54:50,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) Word has length 69 [2022-11-25 23:54:50,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:50,790 INFO L225 Difference]: With dead ends: 146 [2022-11-25 23:54:50,790 INFO L226 Difference]: Without dead ends: 101 [2022-11-25 23:54:50,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 179 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=1259, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:54:50,790 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:50,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 13 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:54:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-25 23:54:50,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2022-11-25 23:54:50,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2022-11-25 23:54:50,848 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 69 [2022-11-25 23:54:50,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:50,848 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2022-11-25 23:54:50,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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) [2022-11-25 23:54:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2022-11-25 23:54:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 23:54:50,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:50,849 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:50,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:51,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:51,052 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash 393114464, now seen corresponding path program 18 times [2022-11-25 23:54:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:54:51,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406899334] [2022-11-25 23:54:51,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:51,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:54:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 16 proven. 236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:08,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:55:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406899334] [2022-11-25 23:55:08,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406899334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:55:08,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620689963] [2022-11-25 23:55:08,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:55:08,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:08,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:08,925 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:08,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 23:55:09,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:55:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:55:09,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 236 conjunts are in the unsatisfiable core [2022-11-25 23:55:09,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:09,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:55:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 23:55:21,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 23:55:45,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620689963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:45,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1260491651] [2022-11-25 23:55:45,124 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:55:45,124 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:55:45,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:55:45,125 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:55:45,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:55:45,172 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-25 23:55:45,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-25 23:55:45,223 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:55:45,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:55:45,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:55:45,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:55:45,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:55:45,314 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:55:45,314 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 245 treesize of output 248 [2022-11-25 23:55:45,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:55:45,569 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:55:47,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14520#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:55:47,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:55:47,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:55:47,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 62, 64] total 193 [2022-11-25 23:55:47,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828455121] [2022-11-25 23:55:47,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:55:47,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-25 23:55:47,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:55:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-25 23:55:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=38268, Unknown=0, NotChecked=0, Total=39006 [2022-11-25 23:55:47,351 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 193 states, 193 states have (on average 1.0880829015544042) internal successors, (210), 193 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:45,199 INFO L93 Difference]: Finished difference Result 274 states and 310 transitions. [2022-11-25 23:56:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-25 23:56:45,199 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0880829015544042) internal successors, (210), 193 states have internal predecessors, (210), 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 76 [2022-11-25 23:56:45,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:45,200 INFO L225 Difference]: With dead ends: 274 [2022-11-25 23:56:45,201 INFO L226 Difference]: Without dead ends: 213 [2022-11-25 23:56:45,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18092 ImplicationChecksByTransitivity, 86.0s TimeCoverageRelationStatistics Valid=2243, Invalid=77563, Unknown=0, NotChecked=0, Total=79806 [2022-11-25 23:56:45,206 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 12944 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 13443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 12944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:45,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 239 Invalid, 13443 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [499 Valid, 12944 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-11-25 23:56:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-25 23:56:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 146. [2022-11-25 23:56:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 145 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:45,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2022-11-25 23:56:45,365 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 76 [2022-11-25 23:56:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:45,366 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2022-11-25 23:56:45,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0880829015544042) internal successors, (210), 193 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:45,366 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2022-11-25 23:56:45,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-25 23:56:45,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:45,367 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:45,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:45,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:45,574 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:56:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:45,574 INFO L85 PathProgramCache]: Analyzing trace with hash -853010053, now seen corresponding path program 19 times [2022-11-25 23:56:45,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:56:45,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226021335] [2022-11-25 23:56:45,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:45,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:56:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-25 23:56:45,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:56:45,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226021335] [2022-11-25 23:56:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226021335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:56:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174564246] [2022-11-25 23:56:45,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:56:45,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:45,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:45,935 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:45,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:56:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:46,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:56:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-25 23:56:46,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-25 23:56:46,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174564246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:46,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177439422] [2022-11-25 23:56:46,481 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:56:46,482 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:56:46,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:56:46,482 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:56:46,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:56:46,538 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-25 23:56:46,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-25 23:56:46,587 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:56:46,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:56:46,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:56:46,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:46,675 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:56:46,675 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 250 treesize of output 247 [2022-11-25 23:56:46,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:56:46,900 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:56:47,191 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16003#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:56:47,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:56:47,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:56:47,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-11-25 23:56:47,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807544290] [2022-11-25 23:56:47,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:56:47,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 23:56:47,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:56:47,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 23:56:47,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:56:47,193 INFO L87 Difference]: Start difference. First operand 146 states and 162 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:48,060 INFO L93 Difference]: Finished difference Result 258 states and 289 transitions. [2022-11-25 23:56:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 23:56:48,061 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-25 23:56:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:48,062 INFO L225 Difference]: With dead ends: 258 [2022-11-25 23:56:48,062 INFO L226 Difference]: Without dead ends: 116 [2022-11-25 23:56:48,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 200 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 23:56:48,063 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:48,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:56:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-25 23:56:48,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2022-11-25 23:56:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.1111111111111112) internal successors, (120), 108 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2022-11-25 23:56:48,148 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 77 [2022-11-25 23:56:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:48,148 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2022-11-25 23:56:48,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2022-11-25 23:56:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 23:56:48,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:48,150 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:48,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-25 23:56:48,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:48,356 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:56:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:48,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1752202363, now seen corresponding path program 20 times [2022-11-25 23:56:48,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:56:48,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864024049] [2022-11-25 23:56:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:48,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:56:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:56:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-11-25 23:56:48,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:56:48,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864024049] [2022-11-25 23:56:48,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864024049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:56:48,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193213681] [2022-11-25 23:56:48,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:56:48,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:48,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:56:48,687 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:56:48,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 23:56:48,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 23:56:48,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:56:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:56:48,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-11-25 23:56:49,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-11-25 23:56:49,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193213681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:49,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1059530408] [2022-11-25 23:56:49,231 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:56:49,232 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:56:49,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:56:49,232 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:56:49,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:56:49,282 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-25 23:56:49,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-25 23:56:49,344 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:56:49,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:56:49,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-25 23:56:49,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:49,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:56:49,454 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-25 23:56:49,455 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 250 treesize of output 247 [2022-11-25 23:56:49,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:56:49,668 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:56:49,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17248#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:56:49,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:56:49,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:56:49,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-11-25 23:56:49,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979994307] [2022-11-25 23:56:49,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:56:49,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 23:56:49,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:56:49,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 23:56:49,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:56:49,932 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:50,530 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2022-11-25 23:56:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:56:50,531 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-25 23:56:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:50,532 INFO L225 Difference]: With dead ends: 113 [2022-11-25 23:56:50,532 INFO L226 Difference]: Without dead ends: 86 [2022-11-25 23:56:50,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 220 SyntacticMatches, 16 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=366, Invalid=1526, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:56:50,533 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:50,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 9 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:56:50,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-25 23:56:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-25 23:56:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2022-11-25 23:56:50,602 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 81 [2022-11-25 23:56:50,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:50,602 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2022-11-25 23:56:50,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:56:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2022-11-25 23:56:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-25 23:56:50,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:50,604 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:50,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-25 23:56:50,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:56:50,810 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:56:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:50,810 INFO L85 PathProgramCache]: Analyzing trace with hash -651134475, now seen corresponding path program 21 times [2022-11-25 23:56:50,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:56:50,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544597959] [2022-11-25 23:56:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:56:50,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:56:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:57:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 21 proven. 303 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:57:13,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:57:13,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544597959] [2022-11-25 23:57:13,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544597959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:57:13,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711233387] [2022-11-25 23:57:13,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:57:13,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:13,765 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:13,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 23:57:13,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:57:13,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:13,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 270 conjunts are in the unsatisfiable core [2022-11-25 23:57:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:14,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 23:57:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:57:30,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:58:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:58:02,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711233387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:58:02,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1607447407] [2022-11-25 23:58:02,264 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:58:02,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:58:02,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:58:02,264 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:58:02,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:58:02,316 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:58:02,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:58:02,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:58:02,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:58:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:58:02,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:58:02,412 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:58:02,412 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 245 treesize of output 248 [2022-11-25 23:58:02,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:58:02,647 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:58:04,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18388#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:58:04,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:58:04,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:58:04,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 70, 72] total 218 [2022-11-25 23:58:04,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414778978] [2022-11-25 23:58:04,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:58:04,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 218 states [2022-11-25 23:58:04,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:58:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2022-11-25 23:58:04,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=858, Invalid=48648, Unknown=0, NotChecked=0, Total=49506 [2022-11-25 23:58:04,734 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 218 states, 218 states have (on average 1.0779816513761469) internal successors, (235), 218 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:31,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:31,170 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2022-11-25 23:59:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-25 23:59:31,171 INFO L78 Accepts]: Start accepts. Automaton has has 218 states, 218 states have (on average 1.0779816513761469) internal successors, (235), 218 states have internal predecessors, (235), 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 85 [2022-11-25 23:59:31,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:31,171 INFO L225 Difference]: With dead ends: 307 [2022-11-25 23:59:31,172 INFO L226 Difference]: Without dead ends: 239 [2022-11-25 23:59:31,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25072 ImplicationChecksByTransitivity, 123.9s TimeCoverageRelationStatistics Valid=3550, Invalid=109682, Unknown=0, NotChecked=0, Total=113232 [2022-11-25 23:59:31,175 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 76 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 16691 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 17470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 16691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:31,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 275 Invalid, 17470 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [779 Valid, 16691 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2022-11-25 23:59:31,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-25 23:59:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2022-11-25 23:59:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.1049382716049383) internal successors, (179), 162 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:31,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 179 transitions. [2022-11-25 23:59:31,338 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 179 transitions. Word has length 85 [2022-11-25 23:59:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:31,338 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 179 transitions. [2022-11-25 23:59:31,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 218 states, 218 states have (on average 1.0779816513761469) internal successors, (235), 218 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 179 transitions. [2022-11-25 23:59:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 23:59:31,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:31,340 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:31,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:31,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 23:59:31,547 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:59:31,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:31,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1121098778, now seen corresponding path program 22 times [2022-11-25 23:59:31,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:59:31,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320941256] [2022-11-25 23:59:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:31,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:59:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-25 23:59:31,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:59:31,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320941256] [2022-11-25 23:59:31,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320941256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:59:31,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986719883] [2022-11-25 23:59:31,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:59:31,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:31,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:31,882 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:31,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 23:59:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:32,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:59:32,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-25 23:59:32,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-25 23:59:32,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986719883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:32,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1046183157] [2022-11-25 23:59:32,506 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:59:32,506 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:59:32,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:59:32,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:59:32,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:59:32,565 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:59:32,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:59:32,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-25 23:59:32,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:59:32,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:59:32,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:59:32,660 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:59:32,660 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 245 treesize of output 248 [2022-11-25 23:59:32,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:59:32,908 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:59:33,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20086#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:59:33,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:59:33,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:59:33,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-11-25 23:59:33,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365582665] [2022-11-25 23:59:33,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:59:33,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 23:59:33,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:59:33,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 23:59:33,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:59:33,225 INFO L87 Difference]: Start difference. First operand 163 states and 179 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:34,269 INFO L93 Difference]: Finished difference Result 287 states and 318 transitions. [2022-11-25 23:59:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:59:34,270 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-25 23:59:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:34,271 INFO L225 Difference]: With dead ends: 287 [2022-11-25 23:59:34,271 INFO L226 Difference]: Without dead ends: 128 [2022-11-25 23:59:34,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 224 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=1631, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 23:59:34,272 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:34,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 17 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:59:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-25 23:59:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2022-11-25 23:59:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1) internal successors, (132), 120 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2022-11-25 23:59:34,393 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 86 [2022-11-25 23:59:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:34,393 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2022-11-25 23:59:34,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2022-11-25 23:59:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-25 23:59:34,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:34,394 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:34,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:34,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 23:59:34,595 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:59:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:34,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1393333712, now seen corresponding path program 23 times [2022-11-25 23:59:34,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:59:34,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568678523] [2022-11-25 23:59:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:34,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:59:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:59:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-25 23:59:34,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:59:34,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568678523] [2022-11-25 23:59:34,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568678523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:59:34,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542481651] [2022-11-25 23:59:34,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:59:34,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:34,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:59:34,927 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:59:34,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 23:59:35,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 23:59:35,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:59:35,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:59:35,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:59:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-25 23:59:35,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:59:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-25 23:59:35,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542481651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:59:35,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [526805877] [2022-11-25 23:59:35,591 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-25 23:59:35,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:59:35,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:59:35,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:59:35,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:59:35,639 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-25 23:59:35,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 46 [2022-11-25 23:59:35,708 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-25 23:59:35,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-25 23:59:35,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 23:59:35,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:59:35,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:59:35,792 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-25 23:59:35,793 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 245 treesize of output 248 [2022-11-25 23:59:35,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:59:36,018 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:59:36,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21472#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:59:36,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:59:36,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:59:36,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-11-25 23:59:36,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348513052] [2022-11-25 23:59:36,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:59:36,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 23:59:36,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:59:36,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 23:59:36,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:59:36,277 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:59:37,050 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2022-11-25 23:59:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 23:59:37,058 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 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 90 [2022-11-25 23:59:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:59:37,059 INFO L225 Difference]: With dead ends: 125 [2022-11-25 23:59:37,059 INFO L226 Difference]: Without dead ends: 95 [2022-11-25 23:59:37,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 237 SyntacticMatches, 18 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=438, Invalid=1818, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 23:59:37,060 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:59:37,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:59:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-25 23:59:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-25 23:59:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 94 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2022-11-25 23:59:37,154 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 90 [2022-11-25 23:59:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:59:37,154 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2022-11-25 23:59:37,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:59:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2022-11-25 23:59:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-25 23:59:37,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:59:37,156 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:59:37,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 23:59:37,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:59:37,359 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:59:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:59:37,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1825812992, now seen corresponding path program 24 times [2022-11-25 23:59:37,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:59:37,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799751851] [2022-11-25 23:59:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:59:37,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:59:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:00:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 57 proven. 348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:00:08,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:00:08,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799751851] [2022-11-26 00:00:08,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799751851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:00:08,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499793077] [2022-11-26 00:00:08,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:00:08,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:00:08,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:00:08,311 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:00:08,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46b91050-4b55-4f4e-a3a8-617afb2c18a6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-26 00:00:08,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:00:08,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:00:08,513 WARN L261 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 298 conjunts are in the unsatisfiable core [2022-11-26 00:00:08,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:00:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 00:00:30,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:01:06,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:01:06,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 155 treesize of output 906 [2022-11-26 00:01:28,148 INFO L321 Elim1Store]: treesize reduction 846, result has 4.2 percent of original size [2022-11-26 00:01:28,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 154 treesize of output 59 [2022-11-26 00:01:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-26 00:01:28,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499793077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:01:28,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415217930] [2022-11-26 00:01:28,503 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-26 00:01:28,503 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:01:28,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:01:28,504 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:01:28,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:01:28,558 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:01:28,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-26 00:01:28,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-26 00:01:28,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:01:28,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:01:28,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:01:28,652 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-26 00:01:28,653 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 245 treesize of output 248 [2022-11-26 00:01:28,720 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 00:01:28,881 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:01:31,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22728#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0)) (= ~MAX~0 100000) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:01:31,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:01:31,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:01:31,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 78, 80] total 243 [2022-11-26 00:01:31,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993305699] [2022-11-26 00:01:31,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:01:31,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2022-11-26 00:01:31,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:01:31,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2022-11-26 00:01:31,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1015, Invalid=60241, Unknown=0, NotChecked=0, Total=61256 [2022-11-26 00:01:31,135 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 243 states, 243 states have (on average 1.0699588477366255) internal successors, (260), 243 states have internal predecessors, (260), 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)