./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh --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 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --- 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-2329fc7 [2022-12-14 14:31:59,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:31:59,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:31:59,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:31:59,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:31:59,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:31:59,093 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:31:59,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:31:59,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:31:59,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:31:59,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:31:59,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:31:59,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:31:59,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:31:59,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:31:59,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:31:59,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:31:59,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:31:59,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:31:59,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:31:59,106 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:31:59,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:31:59,108 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:31:59,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:31:59,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:31:59,111 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:31:59,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:31:59,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:31:59,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:31:59,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:31:59,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:31:59,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:31:59,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:31:59,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:31:59,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:31:59,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:31:59,116 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:31:59,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:31:59,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:31:59,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:31:59,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:31:59,118 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:31:59,133 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:31:59,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:31:59,133 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:31:59,133 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:31:59,134 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:31:59,134 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:31:59,134 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:31:59,134 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:31:59,134 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:31:59,134 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:31:59,135 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:31:59,135 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:31:59,135 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:31:59,135 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:31:59,135 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:31:59,135 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:31:59,135 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:31:59,135 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:31:59,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:31:59,136 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:31:59,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:31:59,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:31:59,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:31:59,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:31:59,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:31:59,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:31:59,137 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:31:59,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:31:59,137 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:31:59,137 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:31:59,137 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:31:59,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:31:59,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:31:59,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:31:59,138 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:31:59,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:31:59,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:31:59,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:31:59,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:31:59,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:31:59,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:31:59,139 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_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 [2022-12-14 14:31:59,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:31:59,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:31:59,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:31:59,332 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:31:59,332 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:31:59,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2022-12-14 14:32:01,871 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:32:02,000 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:32:02,000 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2022-12-14 14:32:02,004 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/data/048897ec5/8e1c2c72444849c8b2f87bc3a2e00286/FLAGd5150e13e [2022-12-14 14:32:02,434 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/data/048897ec5/8e1c2c72444849c8b2f87bc3a2e00286 [2022-12-14 14:32:02,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:32:02,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:32:02,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:32:02,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:32:02,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:32:02,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcd3842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02, skipping insertion in model container [2022-12-14 14:32:02,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:32:02,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:32:02,578 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_0c89df76-fa0f-44f8-9a01-c57ab3e85893/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2022-12-14 14:32:02,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:32:02,595 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:32:02,604 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_0c89df76-fa0f-44f8-9a01-c57ab3e85893/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2022-12-14 14:32:02,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:32:02,617 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:32:02,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02 WrapperNode [2022-12-14 14:32:02,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:32:02,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:32:02,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:32:02,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:32:02,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,641 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2022-12-14 14:32:02,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:32:02,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:32:02,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:32:02,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:32:02,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,655 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:32:02,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:32:02,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:32:02,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:32:02,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (1/1) ... [2022-12-14 14:32:02,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:32:02,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:02,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:32:02,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:32:02,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:32:02,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:32:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 14:32:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 14:32:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:32:02,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:32:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 14:32:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 14:32:02,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 14:32:02,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 14:32:02,769 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:32:02,771 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:32:02,867 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:32:02,889 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:32:02,889 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 14:32:02,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:32:02 BoogieIcfgContainer [2022-12-14 14:32:02,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:32:02,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:32:02,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:32:02,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:32:02,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:32:02" (1/3) ... [2022-12-14 14:32:02,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59482719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:32:02, skipping insertion in model container [2022-12-14 14:32:02,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:02" (2/3) ... [2022-12-14 14:32:02,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59482719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:32:02, skipping insertion in model container [2022-12-14 14:32:02,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:32:02" (3/3) ... [2022-12-14 14:32:02,898 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2022-12-14 14:32:02,912 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:32:02,912 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:32:02,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:32:02,953 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;@3d14da41, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:32:02,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:32:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 14:32:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 14:32:02,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:02,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:02,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:32:02,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:02,967 INFO L85 PathProgramCache]: Analyzing trace with hash 473793790, now seen corresponding path program 1 times [2022-12-14 14:32:02,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:32:02,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025436408] [2022-12-14 14:32:02,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:02,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:32:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:32:03,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:32:03,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025436408] [2022-12-14 14:32:03,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025436408] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:03,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:03,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:32:03,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119610042] [2022-12-14 14:32:03,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:03,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:32:03,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:32:03,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:32:03,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:32:03,169 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:32:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:03,217 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-12-14 14:32:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:32:03,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 14:32:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:03,225 INFO L225 Difference]: With dead ends: 36 [2022-12-14 14:32:03,225 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 14:32:03,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:32:03,229 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:03,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:32:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 14:32:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-12-14 14:32:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 14:32:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-12-14 14:32:03,258 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 8 [2022-12-14 14:32:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:03,259 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-12-14 14:32:03,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:32:03,259 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-12-14 14:32:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 14:32:03,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:03,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:03,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:32:03,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:32:03,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:03,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1820995994, now seen corresponding path program 1 times [2022-12-14 14:32:03,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:32:03,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531564766] [2022-12-14 14:32:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:03,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:32:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:32:03,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:32:03,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531564766] [2022-12-14 14:32:03,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531564766] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:32:03,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821510028] [2022-12-14 14:32:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:03,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:03,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:03,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:03,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:32:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:03,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 14:32:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:03,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 14:32:03,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 14:32:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:32:03,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:03,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2022-12-14 14:32:03,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2022-12-14 14:32:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:32:03,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821510028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:03,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231146610] [2022-12-14 14:32:03,879 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 14:32:03,879 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:32:03,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:32:03,886 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:32:03,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:32:03,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:03,928 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 14:32:03,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 14:32:03,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:03,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 14:32:03,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:03,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 55 [2022-12-14 14:32:04,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:04,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:04,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:04,051 INFO L321 Elim1Store]: treesize reduction 110, result has 6.0 percent of original size [2022-12-14 14:32:04,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 228 [2022-12-14 14:32:04,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-14 14:32:04,123 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2022-12-14 14:32:04,139 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:32:04,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '159#(and (exists ((|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1|) (= |__VERIFIER_assert_#in~cond| (ite (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_1|) 0) 4294967296) 0) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:32:04,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:32:04,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:32:04,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 8] total 15 [2022-12-14 14:32:04,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130219785] [2022-12-14 14:32:04,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:04,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 14:32:04,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:32:04,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 14:32:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-12-14 14:32:04,352 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:32:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:04,598 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-12-14 14:32:04,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 14:32:04,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 14:32:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:04,599 INFO L225 Difference]: With dead ends: 47 [2022-12-14 14:32:04,599 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 14:32:04,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-12-14 14:32:04,601 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:04,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 82 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 14:32:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-12-14 14:32:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:32:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-12-14 14:32:04,610 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2022-12-14 14:32:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:04,610 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-12-14 14:32:04,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:32:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-12-14 14:32:04,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 14:32:04,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:04,611 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:04,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:32:04,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:04,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:32:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:04,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1985506181, now seen corresponding path program 1 times [2022-12-14 14:32:04,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:32:04,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725206441] [2022-12-14 14:32:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:04,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:32:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:32:04,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:32:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725206441] [2022-12-14 14:32:04,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725206441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:32:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030562136] [2022-12-14 14:32:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:04,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:04,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:04,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:04,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:32:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:04,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 14:32:04,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:04,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 14:32:05,521 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-12-14 14:32:05,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 10 [2022-12-14 14:32:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:32:05,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:05,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 14:32:05,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-12-14 14:32:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:32:06,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030562136] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:06,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [679706039] [2022-12-14 14:32:06,122 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 14:32:06,123 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:32:06,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:32:06,123 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:32:06,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:32:06,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:06,142 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:32:06,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 14:32:06,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:06,160 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 14:32:06,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 14:32:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:06,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:32:06,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:06,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:32:06,237 INFO L321 Elim1Store]: treesize reduction 119, result has 25.2 percent of original size [2022-12-14 14:32:06,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 199 treesize of output 221 [2022-12-14 14:32:06,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-14 14:32:06,475 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2022-12-14 14:32:06,519 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:32:07,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '405#(and (or (and (exists ((|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7| Int)) (and (= (ite (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7|) 0) 4294967296) 0) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_7|))) (= |#NULL.base| 0)) (and (exists ((|v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6| Int)) (and (= (ite (not (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|) 4) 4294967296) 0)) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|) (not (= (ite (= (mod (select (select |#memory_int| |v_ULTIMATE.start_main_~#array~0#1.base_BEFORE_CALL_6|) 0) 4294967296) 0) 1 0) 0)))) (= |#NULL.base| 0))) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 14:32:07,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:32:07,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:32:07,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 11] total 21 [2022-12-14 14:32:07,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152037305] [2022-12-14 14:32:07,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:07,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 14:32:07,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:32:07,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 14:32:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-12-14 14:32:07,548 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:32:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:08,629 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2022-12-14 14:32:08,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 14:32:08,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2022-12-14 14:32:08,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:08,630 INFO L225 Difference]: With dead ends: 71 [2022-12-14 14:32:08,630 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 14:32:08,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 14:32:08,631 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:08,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 93 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:32:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 14:32:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-12-14 14:32:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 14:32:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-12-14 14:32:08,641 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2022-12-14 14:32:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:08,641 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-12-14 14:32:08,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:32:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-12-14 14:32:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 14:32:08,642 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:08,642 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:08,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:32:08,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:08,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:32:08,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:08,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1451939446, now seen corresponding path program 1 times [2022-12-14 14:32:08,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:32:08,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801238996] [2022-12-14 14:32:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:08,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:32:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:32:08,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:32:08,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801238996] [2022-12-14 14:32:08,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801238996] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:32:08,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008975294] [2022-12-14 14:32:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:08,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:08,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:08,986 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:08,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:32:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:09,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 14:32:09,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:09,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-12-14 14:32:09,896 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-12-14 14:32:09,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 10 [2022-12-14 14:32:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:32:09,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:10,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-12-14 14:32:10,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-12-14 14:32:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 14:32:10,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008975294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:10,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894842370] [2022-12-14 14:32:10,505 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 14:32:10,505 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:32:10,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:32:10,505 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:32:10,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:32:10,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,527 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:32:10,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 14:32:10,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,547 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 14:32:10,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 14:32:10,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:32:10,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:10,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:32:10,625 INFO L321 Elim1Store]: treesize reduction 119, result has 25.2 percent of original size [2022-12-14 14:32:10,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 199 treesize of output 221 [2022-12-14 14:32:10,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-14 14:32:11,262 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 14:32:11,265 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:32:12,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '779#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:32:12,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:32:12,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:32:12,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 13] total 27 [2022-12-14 14:32:12,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337638011] [2022-12-14 14:32:12,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:12,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 14:32:12,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:32:12,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 14:32:12,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 14:32:12,089 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 27 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 7 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 14:32:15,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:32:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:17,411 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2022-12-14 14:32:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 14:32:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 7 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-12-14 14:32:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:17,413 INFO L225 Difference]: With dead ends: 108 [2022-12-14 14:32:17,414 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 14:32:17,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=381, Invalid=2589, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 14:32:17,415 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:17,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 152 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 444 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 14:32:17,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 14:32:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2022-12-14 14:32:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 55 states have internal predecessors, (60), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 14:32:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2022-12-14 14:32:17,432 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 29 [2022-12-14 14:32:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:17,432 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2022-12-14 14:32:17,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 7 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 14:32:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2022-12-14 14:32:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 14:32:17,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:17,433 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:17,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:32:17,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:17,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:32:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:17,634 INFO L85 PathProgramCache]: Analyzing trace with hash -30686945, now seen corresponding path program 2 times [2022-12-14 14:32:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:32:17,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233691174] [2022-12-14 14:32:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:32:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:32:17,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:32:17,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233691174] [2022-12-14 14:32:17,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233691174] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:32:17,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16384513] [2022-12-14 14:32:17,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:32:17,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:17,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:17,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:17,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:32:17,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:32:17,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:32:17,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 14:32:17,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 14:32:17,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:32:18,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16384513] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:18,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1484671246] [2022-12-14 14:32:18,012 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 14:32:18,012 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:32:18,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:32:18,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:32:18,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:32:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:18,030 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:32:18,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 14:32:18,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:18,048 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 14:32:18,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 14:32:18,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:18,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 55 [2022-12-14 14:32:18,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:18,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:18,127 INFO L321 Elim1Store]: treesize reduction 110, result has 6.0 percent of original size [2022-12-14 14:32:18,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 228 [2022-12-14 14:32:18,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-14 14:32:18,703 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 14:32:18,707 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:32:19,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1313#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:32:19,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:32:19,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:32:19,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2022-12-14 14:32:19,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436774508] [2022-12-14 14:32:19,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:19,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 14:32:19,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:32:19,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 14:32:19,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-12-14 14:32:19,191 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 14:32:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:19,681 INFO L93 Difference]: Finished difference Result 170 states and 212 transitions. [2022-12-14 14:32:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 14:32:19,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-12-14 14:32:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:19,683 INFO L225 Difference]: With dead ends: 170 [2022-12-14 14:32:19,683 INFO L226 Difference]: Without dead ends: 108 [2022-12-14 14:32:19,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-12-14 14:32:19,684 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:19,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 125 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:32:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-14 14:32:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 72. [2022-12-14 14:32:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.103448275862069) internal successors, (64), 59 states have internal predecessors, (64), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 14:32:19,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-12-14 14:32:19,704 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 39 [2022-12-14 14:32:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:19,705 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-12-14 14:32:19,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 14:32:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-12-14 14:32:19,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 14:32:19,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:19,705 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:19,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 14:32:19,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:19,907 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:32:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1821660831, now seen corresponding path program 3 times [2022-12-14 14:32:19,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:32:19,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200942872] [2022-12-14 14:32:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:19,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:32:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:32:20,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:32:20,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200942872] [2022-12-14 14:32:20,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200942872] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:32:20,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248209570] [2022-12-14 14:32:20,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:32:20,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:20,189 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:20,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:32:20,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:32:20,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:32:20,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 14:32:20,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:20,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 14:32:20,399 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2022-12-14 14:32:20,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-12-14 14:32:20,448 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2022-12-14 14:32:20,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-12-14 14:32:20,494 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2022-12-14 14:32:20,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-12-14 14:32:20,543 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2022-12-14 14:32:20,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-12-14 14:32:20,599 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2022-12-14 14:32:20,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-12-14 14:32:20,664 INFO L321 Elim1Store]: treesize reduction 62, result has 22.5 percent of original size [2022-12-14 14:32:20,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-12-14 14:32:29,665 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-12-14 14:32:29,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2022-12-14 14:32:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 3 proven. 82 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:32:29,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:32,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 89 [2022-12-14 14:32:32,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30618 treesize of output 30586 [2022-12-14 14:32:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:32:34,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248209570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354053260] [2022-12-14 14:32:34,553 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 14:32:34,553 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:32:34,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:32:34,553 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:32:34,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:32:34,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:34,569 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 14:32:34,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 14:32:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:34,585 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 14:32:34,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 14:32:34,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:34,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:32:34,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:34,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:32:34,653 INFO L321 Elim1Store]: treesize reduction 119, result has 25.2 percent of original size [2022-12-14 14:32:34,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 199 treesize of output 221 [2022-12-14 14:32:34,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-12-14 14:32:35,305 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 14:32:35,308 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:32:38,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1987#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 14:32:38,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:32:38,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:32:38,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22, 21] total 49 [2022-12-14 14:32:38,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515467543] [2022-12-14 14:32:38,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:38,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 14:32:38,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:32:38,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 14:32:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2985, Unknown=4, NotChecked=0, Total=3306 [2022-12-14 14:32:38,247 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 49 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 9 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 14:32:40,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 14:33:15,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 14:33:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:33:35,941 INFO L93 Difference]: Finished difference Result 231 states and 282 transitions. [2022-12-14 14:33:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 14:33:35,942 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 9 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-12-14 14:33:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:33:35,944 INFO L225 Difference]: With dead ends: 231 [2022-12-14 14:33:35,944 INFO L226 Difference]: Without dead ends: 171 [2022-12-14 14:33:35,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 74 SyntacticMatches, 17 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3976 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=1520, Invalid=11358, Unknown=4, NotChecked=0, Total=12882 [2022-12-14 14:33:35,946 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 407 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 2092 mSolverCounterSat, 315 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 2092 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:33:35,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 467 Invalid, 2409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 2092 Invalid, 2 Unknown, 0 Unchecked, 18.2s Time] [2022-12-14 14:33:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-14 14:33:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 111. [2022-12-14 14:33:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 90 states have internal predecessors, (95), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 14:33:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-12-14 14:33:35,980 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 45 [2022-12-14 14:33:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:33:35,980 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-12-14 14:33:35,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 9 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 14:33:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-12-14 14:33:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 14:33:35,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:33:35,981 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 14:33:35,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 14:33:36,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 14:33:36,183 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:33:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:33:36,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1373179438, now seen corresponding path program 4 times [2022-12-14 14:33:36,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:33:36,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810314316] [2022-12-14 14:33:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:33:36,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:33:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:33:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 14:33:36,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:33:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810314316] [2022-12-14 14:33:36,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810314316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:33:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264423063] [2022-12-14 14:33:36,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:33:36,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:33:36,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:33:36,466 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:33:36,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c89df76-fa0f-44f8-9a01-c57ab3e85893/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:33:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:33:36,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 14:33:36,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:33:36,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 14:33:36,694 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2022-12-14 14:33:36,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-12-14 14:33:36,745 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2022-12-14 14:33:36,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-12-14 14:33:36,800 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2022-12-14 14:33:36,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-12-14 14:33:36,849 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2022-12-14 14:33:36,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-12-14 14:33:36,899 INFO L321 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2022-12-14 14:33:36,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-12-14 14:33:36,961 INFO L321 Elim1Store]: treesize reduction 62, result has 22.5 percent of original size [2022-12-14 14:33:36,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-12-14 14:33:47,829 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-12-14 14:33:47,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2022-12-14 14:33:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 106 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:33:47,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:33:51,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 171 [2022-12-14 14:33:51,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32538602 treesize of output 32473066 [2022-12-14 14:35:11,723 WARN L233 SmtUtils]: Spent 1.33m on a formula simplification that was a NOOP. DAG size: 1759 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:39:46,524 WARN L233 SmtUtils]: Spent 3.23m on a formula simplification. DAG size of input: 1159 DAG size of output: 1159 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:40:39,360 WARN L233 SmtUtils]: Spent 33.79s on a formula simplification. DAG size of input: 596 DAG size of output: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:41:29,982 WARN L233 SmtUtils]: Spent 41.07s on a formula simplification. DAG size of input: 596 DAG size of output: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:42:28,706 WARN L233 SmtUtils]: Spent 51.52s on a formula simplification. DAG size of input: 596 DAG size of output: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:43:06,019 WARN L233 SmtUtils]: Spent 26.52s on a formula simplification. DAG size of input: 596 DAG size of output: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:43:37,750 WARN L233 SmtUtils]: Spent 26.34s on a formula simplification. DAG size of input: 596 DAG size of output: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:44:13,837 WARN L233 SmtUtils]: Spent 26.03s on a formula simplification. DAG size of input: 596 DAG size of output: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:44:35,233 WARN L233 SmtUtils]: Spent 16.34s on a formula simplification. DAG size of input: 596 DAG size of output: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:44:50,691 WARN L233 SmtUtils]: Spent 10.31s on a formula simplification that was a NOOP. DAG size: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:45:23,366 WARN L233 SmtUtils]: Spent 27.44s on a formula simplification. DAG size of input: 596 DAG size of output: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:46:00,887 WARN L233 SmtUtils]: Spent 27.33s on a formula simplification. DAG size of input: 596 DAG size of output: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:46:32,228 WARN L233 SmtUtils]: Spent 25.97s on a formula simplification. DAG size of input: 596 DAG size of output: 596 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)