./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW --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 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c --- 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-4e7fbc6 [2022-11-23 14:08:56,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:08:56,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:08:56,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:08:56,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:08:56,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:08:56,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:08:56,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:08:56,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:08:56,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:08:56,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:08:56,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:08:56,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:08:56,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:08:56,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:08:56,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:08:56,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:08:56,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:08:56,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:08:56,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:08:56,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:08:56,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:08:56,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:08:56,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:08:56,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:08:56,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:08:56,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:08:56,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:08:56,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:08:56,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:08:56,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:08:56,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:08:56,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:08:56,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:08:56,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:08:56,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:08:56,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:08:56,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:08:56,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:08:56,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:08:56,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:08:56,836 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:08:56,876 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:08:56,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:08:56,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:08:56,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:08:56,878 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:08:56,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:08:56,879 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:08:56,879 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:08:56,879 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:08:56,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:08:56,881 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:08:56,881 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:08:56,881 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:08:56,882 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:08:56,882 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:08:56,882 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:08:56,882 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:08:56,882 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:08:56,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:08:56,883 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:08:56,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:08:56,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:08:56,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:08:56,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:08:56,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:08:56,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:08:56,885 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:08:56,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:08:56,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:08:56,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:08:56,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:08:56,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:08:56,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:08:56,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:08:56,887 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:08:56,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:08:56,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:08:56,888 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:08:56,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:08:56,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:08:56,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:08:56,889 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_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39463d01f5c85d47bf5e231172595e96b8ff556c59c4a9ab8cf46a88a393b05c [2022-11-23 14:08:57,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:08:57,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:08:57,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:08:57,204 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:08:57,205 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:08:57,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2022-11-23 14:09:00,358 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:09:00,617 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:09:00,618 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2022-11-23 14:09:00,625 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/data/bc4615a61/e416953c2bf44470b9ae33f1b84bce2e/FLAG3fe602138 [2022-11-23 14:09:00,650 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/data/bc4615a61/e416953c2bf44470b9ae33f1b84bce2e [2022-11-23 14:09:00,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:09:00,655 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:09:00,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:09:00,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:09:00,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:09:00,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:00,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c38820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00, skipping insertion in model container [2022-11-23 14:09:00,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:00,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:09:00,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:09:00,885 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_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2022-11-23 14:09:00,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:09:00,919 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:09:00,936 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_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2022-11-23 14:09:00,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:09:00,973 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:09:00,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00 WrapperNode [2022-11-23 14:09:00,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:09:00,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:09:00,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:09:00,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:09:00,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:00,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:01,015 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2022-11-23 14:09:01,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:09:01,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:09:01,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:09:01,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:09:01,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:01,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:01,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:01,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:01,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:01,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:01,048 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:01,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:01,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:09:01,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:09:01,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:09:01,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:09:01,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (1/1) ... [2022-11-23 14:09:01,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:09:01,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:01,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:09:01,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:09:01,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:09:01,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:09:01,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:09:01,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:09:01,218 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:09:01,220 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:09:01,451 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:09:01,661 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:09:01,661 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:09:01,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:09:01 BoogieIcfgContainer [2022-11-23 14:09:01,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:09:01,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:09:01,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:09:01,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:09:01,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:09:00" (1/3) ... [2022-11-23 14:09:01,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752a3e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:09:01, skipping insertion in model container [2022-11-23 14:09:01,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:00" (2/3) ... [2022-11-23 14:09:01,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752a3e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:09:01, skipping insertion in model container [2022-11-23 14:09:01,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:09:01" (3/3) ... [2022-11-23 14:09:01,678 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2022-11-23 14:09:01,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:09:01,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:09:01,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:09:01,781 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;@16ba2723, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:09:01,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:09:01,787 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:09:01,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:01,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:09:01,795 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:01,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:01,806 INFO L85 PathProgramCache]: Analyzing trace with hash 108685352, now seen corresponding path program 1 times [2022-11-23 14:09:01,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:01,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151385271] [2022-11-23 14:09:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:01,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:02,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:02,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:02,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151385271] [2022-11-23 14:09:02,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151385271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:02,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:02,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:09:02,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870790950] [2022-11-23 14:09:02,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:02,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:09:02,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:09:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:09:02,202 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:02,237 INFO L93 Difference]: Finished difference Result 16 states and 23 transitions. [2022-11-23 14:09:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:09:02,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-11-23 14:09:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:02,249 INFO L225 Difference]: With dead ends: 16 [2022-11-23 14:09:02,249 INFO L226 Difference]: Without dead ends: 9 [2022-11-23 14:09:02,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:09:02,256 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:02,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:09:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-23 14:09:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2022-11-23 14:09:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-23 14:09:02,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-11-23 14:09:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:02,294 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-23 14:09:02,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-23 14:09:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:09:02,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:02,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:09:02,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:09:02,296 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:02,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:02,297 INFO L85 PathProgramCache]: Analyzing trace with hash -925984695, now seen corresponding path program 1 times [2022-11-23 14:09:02,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:02,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334530313] [2022-11-23 14:09:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:02,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:02,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:02,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334530313] [2022-11-23 14:09:02,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334530313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:02,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342043628] [2022-11-23 14:09:02,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:02,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:02,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:02,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:02,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:09:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:02,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:09:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:02,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:02,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342043628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:02,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577903239] [2022-11-23 14:09:02,761 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 14:09:02,761 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:02,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:02,771 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:02,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:03,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:04,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '91#(and (or (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|) (= |#NULL.base| 0)) (and (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))) (or (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (< ~last~0 ~SIZE~0)) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0) (= |ULTIMATE.start_main_~st~0#1| 1))) (= |#NULL.base| 0))) (<= |ULTIMATE.start_main_~st~0#1| 1) (not (< |ULTIMATE.start_main_~c~0#1| ~SIZE~0)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2022-11-23 14:09:04,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:04,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:04,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-23 14:09:04,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210407376] [2022-11-23 14:09:04,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:04,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:09:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:04,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:09:04,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:09:04,912 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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) [2022-11-23 14:09:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:04,970 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2022-11-23 14:09:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:09:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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 6 [2022-11-23 14:09:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:04,972 INFO L225 Difference]: With dead ends: 19 [2022-11-23 14:09:04,972 INFO L226 Difference]: Without dead ends: 12 [2022-11-23 14:09:04,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:09:04,974 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:04,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 13 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:09:04,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-23 14:09:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-23 14:09:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-23 14:09:04,979 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-11-23 14:09:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:04,980 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-23 14:09:04,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 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) [2022-11-23 14:09:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-23 14:09:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:09:04,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:04,981 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-23 14:09:04,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:05,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:05,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:05,188 INFO L85 PathProgramCache]: Analyzing trace with hash 303425640, now seen corresponding path program 2 times [2022-11-23 14:09:05,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:05,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180567757] [2022-11-23 14:09:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:05,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:05,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:05,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180567757] [2022-11-23 14:09:05,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180567757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:05,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680955462] [2022-11-23 14:09:05,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:09:05,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:05,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:05,378 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:05,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:09:05,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:09:05,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:09:05,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:09:05,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:05,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:05,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680955462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109768410] [2022-11-23 14:09:05,641 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 14:09:05,641 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:05,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:05,642 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:05,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:06,250 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:07,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '215#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (not (< |ULTIMATE.start_main_~c~0#1| ~SIZE~0)) (or (and (<= |ULTIMATE.start_main_~d~0#1| 0) (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|) (<= 0 |ULTIMATE.start_main_~d~0#1|) (= |#NULL.base| 0)) (and (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)) (= |#NULL.base| 0)) (and (or (and (< ~last~0 ~SIZE~0) (<= 1 |ULTIMATE.start_main_~d~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~d~0#1| 1) (= 2 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~st~0#1| 1) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_main_~d~0#1| 0) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|) (or (not (< ~last~0 ~SIZE~0)) (not (= |ULTIMATE.start_main_~st~0#1| 1))) (= |#NULL.base| 0))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))))) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2022-11-23 14:09:07,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:07,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:07,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-11-23 14:09:07,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093625469] [2022-11-23 14:09:07,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:07,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 14:09:07,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 14:09:07,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:09:07,399 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:07,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:07,556 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-11-23 14:09:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:09:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:09:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:07,557 INFO L225 Difference]: With dead ends: 28 [2022-11-23 14:09:07,557 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 14:09:07,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2022-11-23 14:09:07,559 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:07,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 17 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:09:07,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 14:09:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-11-23 14:09:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-23 14:09:07,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2022-11-23 14:09:07,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:07,564 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-23 14:09:07,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-23 14:09:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:09:07,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:07,565 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-23 14:09:07,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:07,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 14:09:07,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash -431543096, now seen corresponding path program 3 times [2022-11-23 14:09:07,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:07,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116280216] [2022-11-23 14:09:07,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:07,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:08,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:08,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116280216] [2022-11-23 14:09:08,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116280216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:08,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739289793] [2022-11-23 14:09:08,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:09:08,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:08,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:08,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:08,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:09:08,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:09:08,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:09:08,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:09:08,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:08,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:08,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739289793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:08,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [795342989] [2022-11-23 14:09:08,695 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 14:09:08,695 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:08,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:08,695 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:08,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:09,108 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:10,121 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '429#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (not (< |ULTIMATE.start_main_~c~0#1| ~SIZE~0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= ~SIZE~0 200000) (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (or (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|)) (and (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))) (or (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (< ~last~0 ~SIZE~0)) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0) (= |ULTIMATE.start_main_~st~0#1| 1))))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-23 14:09:10,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:10,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:10,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-11-23 14:09:10,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363079691] [2022-11-23 14:09:10,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:10,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-23 14:09:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-23 14:09:10,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 14:09:10,125 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 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) [2022-11-23 14:09:10,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:10,501 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-11-23 14:09:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 14:09:10,502 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 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 15 [2022-11-23 14:09:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:10,503 INFO L225 Difference]: With dead ends: 46 [2022-11-23 14:09:10,503 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 14:09:10,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=938, Invalid=1714, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:09:10,515 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 56 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:10,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 17 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:09:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 14:09:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-23 14:09:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-23 14:09:10,524 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2022-11-23 14:09:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:10,525 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-23 14:09:10,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 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) [2022-11-23 14:09:10,525 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-23 14:09:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 14:09:10,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:10,526 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2022-11-23 14:09:10,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:10,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:10,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:10,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:10,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1633246600, now seen corresponding path program 4 times [2022-11-23 14:09:10,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:10,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255792816] [2022-11-23 14:09:10,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:10,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:11,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:11,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255792816] [2022-11-23 14:09:11,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255792816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:11,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122826462] [2022-11-23 14:09:11,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:09:11,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:11,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:11,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:11,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:09:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:11,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:09:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:12,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:13,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122826462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:13,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1490776395] [2022-11-23 14:09:13,043 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 14:09:13,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:13,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:13,043 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:13,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:13,543 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:14,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '823#(and (or (and (or (and (= 2 |ULTIMATE.start_main_~a~0#1|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))) (or (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (< ~last~0 ~SIZE~0)) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0) (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|))) (= 2 |ULTIMATE.start_main_~b~0#1|) (= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))) (= |#NULL.base| 0)) (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))) (<= |ULTIMATE.start_main_~st~0#1| 1) (not (< |ULTIMATE.start_main_~c~0#1| ~SIZE~0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2022-11-23 14:09:14,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:14,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:14,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2022-11-23 14:09:14,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417965055] [2022-11-23 14:09:14,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:14,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-23 14:09:14,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:14,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-23 14:09:14,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2394, Invalid=3458, Unknown=0, NotChecked=0, Total=5852 [2022-11-23 14:09:14,520 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 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) [2022-11-23 14:09:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:15,639 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2022-11-23 14:09:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 14:09:15,643 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 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) Word has length 27 [2022-11-23 14:09:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:15,644 INFO L225 Difference]: With dead ends: 82 [2022-11-23 14:09:15,644 INFO L226 Difference]: Without dead ends: 54 [2022-11-23 14:09:15,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3749 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3590, Invalid=6310, Unknown=0, NotChecked=0, Total=9900 [2022-11-23 14:09:15,648 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:15,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 25 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:09:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-23 14:09:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-11-23 14:09:15,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-23 14:09:15,667 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2022-11-23 14:09:15,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:15,667 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-23 14:09:15,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 72 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) [2022-11-23 14:09:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-23 14:09:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 14:09:15,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:15,671 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2022-11-23 14:09:15,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 14:09:15,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:15,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1554276104, now seen corresponding path program 5 times [2022-11-23 14:09:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:15,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518993024] [2022-11-23 14:09:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:15,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:18,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:18,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518993024] [2022-11-23 14:09:18,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518993024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:18,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211280099] [2022-11-23 14:09:18,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:09:18,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:18,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:18,029 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:18,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:09:18,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-23 14:09:18,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:09:18,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 14:09:18,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:19,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:19,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:23,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211280099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:23,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1732758131] [2022-11-23 14:09:23,043 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 14:09:23,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:23,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:23,049 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:23,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:23,489 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:24,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1577#(and (or (and (or (and (= 2 |ULTIMATE.start_main_~a~0#1|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))) (or (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (< ~last~0 ~SIZE~0)) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0) (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|))) (= 2 |ULTIMATE.start_main_~b~0#1|) (= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))) (= |#NULL.base| 0)) (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0))) (<= |ULTIMATE.start_main_~st~0#1| 1) (not (< |ULTIMATE.start_main_~c~0#1| ~SIZE~0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2022-11-23 14:09:24,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:24,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:24,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 144 [2022-11-23 14:09:24,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927142790] [2022-11-23 14:09:24,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:24,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-23 14:09:24,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:24,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-23 14:09:24,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9378, Invalid=12674, Unknown=0, NotChecked=0, Total=22052 [2022-11-23 14:09:24,618 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:28,009 INFO L93 Difference]: Finished difference Result 154 states and 204 transitions. [2022-11-23 14:09:28,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-23 14:09:28,009 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 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 51 [2022-11-23 14:09:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:28,010 INFO L225 Difference]: With dead ends: 154 [2022-11-23 14:09:28,011 INFO L226 Difference]: Without dead ends: 102 [2022-11-23 14:09:28,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14429 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=14078, Invalid=24142, Unknown=0, NotChecked=0, Total=38220 [2022-11-23 14:09:28,017 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 100 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:28,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 25 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-23 14:09:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-11-23 14:09:28,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:28,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-11-23 14:09:28,032 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2022-11-23 14:09:28,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:28,033 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-11-23 14:09:28,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.0206896551724138) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-11-23 14:09:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 14:09:28,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:28,036 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2022-11-23 14:09:28,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:28,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:28,238 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:09:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:28,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1760239096, now seen corresponding path program 6 times [2022-11-23 14:09:28,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:28,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764027698] [2022-11-23 14:09:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:28,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:34,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:34,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764027698] [2022-11-23 14:09:34,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764027698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:34,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788501630] [2022-11-23 14:09:34,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:09:34,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:34,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:34,966 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:34,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:09:35,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:09:35,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:09:35,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-23 14:09:35,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:40,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:52,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788501630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:52,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477509527] [2022-11-23 14:09:52,714 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 14:09:52,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:52,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:52,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:52,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:53,123 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:54,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3051#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (not (< |ULTIMATE.start_main_~c~0#1| ~SIZE~0)) (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= ~SIZE~0 200000) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)) (= |#NULL.offset| 0) (= |#NULL.base| 0)) (and (= ~SIZE~0 200000) (or (and (= 2 |ULTIMATE.start_main_~a~0#1|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))) (or (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (< ~last~0 ~SIZE~0)) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0) (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|))) (= 2 |ULTIMATE.start_main_~b~0#1|) (= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))) (= |#NULL.base| 0))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2022-11-23 14:09:54,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:54,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:54,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 288 [2022-11-23 14:09:54,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360387313] [2022-11-23 14:09:54,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:54,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 289 states [2022-11-23 14:09:54,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:54,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 289 interpolants. [2022-11-23 14:09:54,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37170, Invalid=48386, Unknown=0, NotChecked=0, Total=85556 [2022-11-23 14:09:54,514 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:10:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:07,153 INFO L93 Difference]: Finished difference Result 298 states and 396 transitions. [2022-11-23 14:10:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-23 14:10:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 0 states have call successors, (0), 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 99 [2022-11-23 14:10:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:07,156 INFO L225 Difference]: With dead ends: 298 [2022-11-23 14:10:07,157 INFO L226 Difference]: Without dead ends: 198 [2022-11-23 14:10:07,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56525 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=55790, Invalid=94366, Unknown=0, NotChecked=0, Total=150156 [2022-11-23 14:10:07,201 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 196 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:07,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 17 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:10:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-23 14:10:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2022-11-23 14:10:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:10:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-11-23 14:10:07,254 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2022-11-23 14:10:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:07,255 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-11-23 14:10:07,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 289 states, 289 states have (on average 1.0103806228373702) internal successors, (292), 288 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:10:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-11-23 14:10:07,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-23 14:10:07,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:07,262 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2022-11-23 14:10:07,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:07,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:07,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:10:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1432348680, now seen corresponding path program 7 times [2022-11-23 14:10:07,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:07,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649616859] [2022-11-23 14:10:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:07,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:31,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:31,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649616859] [2022-11-23 14:10:31,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649616859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874160844] [2022-11-23 14:10:31,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:10:31,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:31,227 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:31,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:10:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 193 conjunts are in the unsatisfiable core [2022-11-23 14:10:31,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:50,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:11:42,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874160844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:42,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1521589524] [2022-11-23 14:11:42,058 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 14:11:42,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:11:42,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:11:42,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:11:42,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:11:42,585 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:11:44,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5965#(and (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~st~0#1| 1) (not (< |ULTIMATE.start_main_~c~0#1| ~SIZE~0)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |#NULL.base| 0) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (or (and (<= |ULTIMATE.start_main_~d~0#1| 0) (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|) (<= 0 |ULTIMATE.start_main_~d~0#1|)) (and (or (and (< ~last~0 ~SIZE~0) (<= 1 |ULTIMATE.start_main_~d~0#1|) (= 2 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~d~0#1| 1) (= 2 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~st~0#1| 1)) (and (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (= |ULTIMATE.start_main_~d~0#1| 0) (= 2 |ULTIMATE.start_main_~b~0#1|) (= 2 |ULTIMATE.start_main_~a~0#1|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (or (not (< ~last~0 ~SIZE~0)) (not (= |ULTIMATE.start_main_~st~0#1| 1))))) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1))' at error location [2022-11-23 14:11:44,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:11:44,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:11:44,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 576 [2022-11-23 14:11:44,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074767167] [2022-11-23 14:11:44,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:44,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 577 states [2022-11-23 14:11:44,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:44,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 577 interpolants. [2022-11-23 14:11:44,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148050, Invalid=188930, Unknown=0, NotChecked=0, Total=336980 [2022-11-23 14:11:44,817 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:37,539 INFO L93 Difference]: Finished difference Result 586 states and 780 transitions. [2022-11-23 14:12:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 385 states. [2022-11-23 14:12:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 0 states have call successors, (0), 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 195 [2022-11-23 14:12:37,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:37,543 INFO L225 Difference]: With dead ends: 586 [2022-11-23 14:12:37,544 INFO L226 Difference]: Without dead ends: 390 [2022-11-23 14:12:37,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 967 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 770 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223661 ImplicationChecksByTransitivity, 136.0s TimeCoverageRelationStatistics Valid=222158, Invalid=373054, Unknown=0, NotChecked=0, Total=595212 [2022-11-23 14:12:37,576 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 388 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:37,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 49 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:12:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-23 14:12:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 389. [2022-11-23 14:12:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2022-11-23 14:12:37,617 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2022-11-23 14:12:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:37,618 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2022-11-23 14:12:37,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 577 states, 577 states have (on average 1.0051993067590987) internal successors, (580), 576 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2022-11-23 14:12:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-11-23 14:12:37,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:37,629 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2022-11-23 14:12:37,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:37,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:37,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:37,830 INFO L85 PathProgramCache]: Analyzing trace with hash -945949688, now seen corresponding path program 8 times [2022-11-23 14:12:37,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:37,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973849486] [2022-11-23 14:12:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:37,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:14:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:14:13,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:14:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973849486] [2022-11-23 14:14:13,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973849486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:14:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728134459] [2022-11-23 14:14:13,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:14:13,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:14:13,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:14:13,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:14:13,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f66a24-ebd0-49a3-9e90-ce8ff6fb91d4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:14:16,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2022-11-23 14:14:16,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:14:16,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 385 conjunts are in the unsatisfiable core [2022-11-23 14:14:16,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:15:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:15:36,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:19:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:19:35,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728134459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:19:35,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1131910780] [2022-11-23 14:19:35,609 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 14:19:35,609 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:19:35,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:19:35,610 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:19:35,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:19:35,930 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:19:38,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11759#(and (<= |ULTIMATE.start_main_~st~0#1| 1) (not (< |ULTIMATE.start_main_~c~0#1| ~SIZE~0)) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 (+ ~last~0 2147483648)) (or (and (= 3 |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1))) (and (or (and (= 2 |ULTIMATE.start_main_~a~0#1|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= ~last~0 |ULTIMATE.start_main_~c~0#1|))) (or (and (= |ULTIMATE.start_main_~d~0#1| 0) (or (not (< ~last~0 ~SIZE~0)) (not (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= |ULTIMATE.start_main_~d~0#1| 1) (< ~last~0 ~SIZE~0) (= |ULTIMATE.start_main_~st~0#1| 1)))) (and (= ~last~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~st~0#1| 0) (= |ULTIMATE.start_main_~d~0#1| 0) (= 3 |ULTIMATE.start_main_~a~0#1|))) (= 2 |ULTIMATE.start_main_~b~0#1|) (or (not (= |ULTIMATE.start_main_~st~0#1| 0)) (not (= |ULTIMATE.start_main_~c~0#1| (+ ~last~0 1)))))) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= ~SIZE~0 200000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (and (= ~SIZE~0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) 1 0)) (<= ~last~0 2147483647) (<= 0 |#NULL.offset|) (<= 200000 ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-23 14:19:38,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:19:38,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:19:38,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 1152 [2022-11-23 14:19:38,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064104932] [2022-11-23 14:19:38,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:19:39,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 1153 states [2022-11-23 14:19:39,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:39,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1153 interpolants. [2022-11-23 14:19:39,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590994, Invalid=746498, Unknown=0, NotChecked=0, Total=1337492 [2022-11-23 14:19:39,128 INFO L87 Difference]: Start difference. First operand 389 states and 390 transitions. Second operand has 1153 states, 1153 states have (on average 1.002601908065915) internal successors, (1156), 1152 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)