./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/copysome2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0 --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 498a9d01a4c9c1e07ef15169be61a1aa89cf7662222e03da034e67869e2f7c71 --- 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-e04fb08 [2022-11-16 19:52:02,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:52:02,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:52:02,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:52:02,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:52:02,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:52:02,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:52:02,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:52:02,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:52:02,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:52:02,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:52:02,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:52:02,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:52:02,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:52:02,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:52:03,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:52:03,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:52:03,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:52:03,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:52:03,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:52:03,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:52:03,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:52:03,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:52:03,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:52:03,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:52:03,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:52:03,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:52:03,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:52:03,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:52:03,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:52:03,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:52:03,047 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:52:03,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:52:03,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:52:03,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:52:03,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:52:03,055 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:52:03,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:52:03,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:52:03,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:52:03,058 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:52:03,059 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:52:03,114 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:52:03,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:52:03,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:52:03,115 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:52:03,116 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:52:03,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:52:03,117 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:52:03,117 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:52:03,118 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:52:03,118 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:52:03,119 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:52:03,120 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:52:03,120 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:52:03,120 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:52:03,120 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:52:03,121 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:52:03,121 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:52:03,121 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:52:03,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:52:03,122 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:52:03,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:52:03,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:52:03,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:52:03,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:52:03,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:52:03,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:52:03,126 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:52:03,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:52:03,126 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:52:03,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:52:03,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:52:03,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:52:03,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:52:03,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:52:03,130 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:52:03,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:52:03,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:52:03,131 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:52:03,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:52:03,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:52:03,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:52:03,132 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_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 498a9d01a4c9c1e07ef15169be61a1aa89cf7662222e03da034e67869e2f7c71 [2022-11-16 19:52:03,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:52:03,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:52:03,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:52:03,528 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:52:03,529 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:52:03,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-programs/copysome2-2.i [2022-11-16 19:52:03,616 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/data/ca6ac1ad2/6a7bbfedd61a4831a48b9dff09b564b4/FLAGd0bf2031d [2022-11-16 19:52:04,214 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:52:04,215 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/sv-benchmarks/c/array-programs/copysome2-2.i [2022-11-16 19:52:04,224 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/data/ca6ac1ad2/6a7bbfedd61a4831a48b9dff09b564b4/FLAGd0bf2031d [2022-11-16 19:52:04,580 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/data/ca6ac1ad2/6a7bbfedd61a4831a48b9dff09b564b4 [2022-11-16 19:52:04,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:52:04,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:52:04,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:52:04,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:52:04,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:52:04,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:52:04" (1/1) ... [2022-11-16 19:52:04,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5378f9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:04, skipping insertion in model container [2022-11-16 19:52:04,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:52:04" (1/1) ... [2022-11-16 19:52:04,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:52:04,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:52:04,908 WARN L229 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_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/sv-benchmarks/c/array-programs/copysome2-2.i[804,817] [2022-11-16 19:52:04,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:52:04,951 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:52:04,973 WARN L229 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_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/sv-benchmarks/c/array-programs/copysome2-2.i[804,817] [2022-11-16 19:52:05,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:52:05,021 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:52:05,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05 WrapperNode [2022-11-16 19:52:05,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:52:05,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:52:05,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:52:05,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:52:05,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,055 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,090 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-11-16 19:52:05,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:52:05,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:52:05,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:52:05,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:52:05,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,141 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:52:05,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:52:05,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:52:05,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:52:05,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (1/1) ... [2022-11-16 19:52:05,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:52:05,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:52:05,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:52:05,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:52:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:52:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:52:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:52:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:52:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:52:05,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:52:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:52:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:52:05,370 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:52:05,373 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:52:05,647 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:52:05,707 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:52:05,708 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 19:52:05,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:52:05 BoogieIcfgContainer [2022-11-16 19:52:05,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:52:05,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:52:05,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:52:05,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:52:05,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:52:04" (1/3) ... [2022-11-16 19:52:05,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d92a483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:52:05, skipping insertion in model container [2022-11-16 19:52:05,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:52:05" (2/3) ... [2022-11-16 19:52:05,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d92a483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:52:05, skipping insertion in model container [2022-11-16 19:52:05,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:52:05" (3/3) ... [2022-11-16 19:52:05,723 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome2-2.i [2022-11-16 19:52:05,752 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:52:05,752 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:52:05,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:52:05,885 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;@741f045b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:52:05,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:52:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 19:52:05,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:05,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:05,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:52:05,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:05,931 INFO L85 PathProgramCache]: Analyzing trace with hash 904902092, now seen corresponding path program 1 times [2022-11-16 19:52:05,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:52:05,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319273305] [2022-11-16 19:52:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:05,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:52:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:06,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:52:06,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:52:06,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319273305] [2022-11-16 19:52:06,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319273305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:06,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:06,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:06,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222357530] [2022-11-16 19:52:06,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:06,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:52:06,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:52:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:52:06,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:52:06,406 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:06,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:06,495 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-11-16 19:52:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:52:06,498 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 19:52:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:06,508 INFO L225 Difference]: With dead ends: 21 [2022-11-16 19:52:06,508 INFO L226 Difference]: Without dead ends: 12 [2022-11-16 19:52:06,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:52:06,516 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:06,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:52:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-16 19:52:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-16 19:52:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-16 19:52:06,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2022-11-16 19:52:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:06,559 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-16 19:52:06,559 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-16 19:52:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:06,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:06,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:06,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:52:06,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:52:06,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:06,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1842715167, now seen corresponding path program 1 times [2022-11-16 19:52:06,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:52:06,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046486385] [2022-11-16 19:52:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:06,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:52:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:52:06,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:52:06,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046486385] [2022-11-16 19:52:06,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046486385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:52:06,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455725798] [2022-11-16 19:52:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:06,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:06,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:52:06,802 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:52:06,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:52:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:06,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:52:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:52:07,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:52:07,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455725798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:52:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824815481] [2022-11-16 19:52:07,112 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:52:07,113 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:52:07,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:52:07,125 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:52:07,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:52:07,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,417 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-16 19:52:07,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-16 19:52:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-16 19:52:07,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-16 19:52:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:07,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:07,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:07,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:07,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:07,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:08,210 INFO L321 Elim1Store]: treesize reduction 585, result has 10.8 percent of original size [2022-11-16 19:52:08,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 422 treesize of output 377 [2022-11-16 19:52:09,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:09,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:09,561 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-11-16 19:52:09,563 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 2 case distinctions, treesize of input 94 treesize of output 48 [2022-11-16 19:52:09,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:09,645 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:09,645 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 25 treesize of output 25 [2022-11-16 19:52:09,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:09,723 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:09,725 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 25 treesize of output 25 [2022-11-16 19:52:09,793 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:09,794 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 15 treesize of output 15 [2022-11-16 19:52:09,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:09,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:09,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:10,191 INFO L321 Elim1Store]: treesize reduction 231, result has 34.6 percent of original size [2022-11-16 19:52:10,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 228 [2022-11-16 19:52:10,738 INFO L321 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2022-11-16 19:52:10,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1161 treesize of output 1119 [2022-11-16 19:52:10,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:10,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1096 treesize of output 1029 [2022-11-16 19:52:11,594 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:12,813 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 19:52:12,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 53 treesize of output 37 [2022-11-16 19:52:12,849 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:13,263 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:13,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:13,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-16 19:52:13,330 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:13,362 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:13,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:13,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2022-11-16 19:52:13,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:13,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-16 19:52:13,762 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 39 treesize of output 25 [2022-11-16 19:52:13,797 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 19 treesize of output 12 [2022-11-16 19:52:13,844 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:13,873 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:14,043 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:14,074 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:14,103 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:14,903 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:14,917 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:14,954 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:14,981 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:14,995 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:15,007 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:16,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:16,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 54 [2022-11-16 19:52:16,126 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:16,165 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:16,215 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:16,236 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:16,270 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:16,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:16,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2022-11-16 19:52:16,411 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:16,439 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:16,482 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:16,534 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:19,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:19,285 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:19,286 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 25 treesize of output 25 [2022-11-16 19:52:19,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:19,310 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:19,311 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 25 treesize of output 25 [2022-11-16 19:52:19,335 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:52:19,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '127#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-16 19:52:19,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:52:19,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:52:19,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 19:52:19,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950357922] [2022-11-16 19:52:19,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:52:19,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:52:19,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:52:19,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:52:19,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:52:19,582 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:19,657 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2022-11-16 19:52:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:52:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:52:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:19,658 INFO L225 Difference]: With dead ends: 30 [2022-11-16 19:52:19,659 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 19:52:19,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:52:19,661 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:19,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:52:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 19:52:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-16 19:52:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-16 19:52:19,667 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2022-11-16 19:52:19,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:19,667 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-16 19:52:19,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-16 19:52:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 19:52:19,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:19,669 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:19,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:19,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:19,887 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:52:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:19,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1262196212, now seen corresponding path program 2 times [2022-11-16 19:52:19,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:52:19,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710018804] [2022-11-16 19:52:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:19,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:52:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 19:52:20,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:52:20,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710018804] [2022-11-16 19:52:20,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710018804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:52:20,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976178772] [2022-11-16 19:52:20,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:52:20,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:20,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:52:20,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:52:20,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:52:20,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:52:20,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:52:20,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:52:20,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 19:52:20,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 19:52:20,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976178772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:52:20,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1310868268] [2022-11-16 19:52:20,688 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:52:20,689 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:52:20,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:52:20,689 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:52:20,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:52:20,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:20,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:20,815 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-16 19:52:20,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-16 19:52:20,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:20,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:20,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:21,000 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-16 19:52:21,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-16 19:52:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:21,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-11-16 19:52:21,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:21,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:21,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:21,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:21,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:21,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:21,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:21,517 INFO L321 Elim1Store]: treesize reduction 585, result has 10.8 percent of original size [2022-11-16 19:52:21,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 422 treesize of output 377 [2022-11-16 19:52:22,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,444 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-11-16 19:52:22,444 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 2 case distinctions, treesize of input 94 treesize of output 48 [2022-11-16 19:52:22,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,494 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:22,494 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 25 treesize of output 25 [2022-11-16 19:52:22,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,548 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:22,548 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 25 treesize of output 25 [2022-11-16 19:52:22,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,600 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:22,601 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 25 treesize of output 25 [2022-11-16 19:52:22,608 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:22,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:22,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,704 INFO L321 Elim1Store]: treesize reduction 116, result has 22.1 percent of original size [2022-11-16 19:52:22,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 143 treesize of output 193 [2022-11-16 19:52:22,910 INFO L321 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2022-11-16 19:52:22,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 170 treesize of output 184 [2022-11-16 19:52:22,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:22,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 122 [2022-11-16 19:52:22,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:22,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:22,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:22,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 110 [2022-11-16 19:52:23,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:23,109 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:23,110 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 25 treesize of output 25 [2022-11-16 19:52:23,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:23,136 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:23,137 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 25 treesize of output 25 [2022-11-16 19:52:23,162 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:52:23,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-16 19:52:23,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:52:23,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:52:23,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-16 19:52:23,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656914477] [2022-11-16 19:52:23,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:52:23,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 19:52:23,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:52:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 19:52:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:52:23,501 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:23,666 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-11-16 19:52:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:52:23,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 19:52:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:23,667 INFO L225 Difference]: With dead ends: 54 [2022-11-16 19:52:23,667 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 19:52:23,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:52:23,669 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:23,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:52:23,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 19:52:23,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-16 19:52:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:23,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-16 19:52:23,678 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 19 [2022-11-16 19:52:23,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:23,679 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-16 19:52:23,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-16 19:52:23,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 19:52:23,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:23,681 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:23,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:23,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:23,888 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:52:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:23,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1863011220, now seen corresponding path program 3 times [2022-11-16 19:52:23,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:52:23,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704152062] [2022-11-16 19:52:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:23,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:52:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-16 19:52:24,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:52:24,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704152062] [2022-11-16 19:52:24,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704152062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:52:24,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437500082] [2022-11-16 19:52:24,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:52:24,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:24,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:52:24,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:52:24,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:52:24,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:52:24,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:52:24,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:52:24,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-16 19:52:24,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-16 19:52:25,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437500082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:52:25,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [458364653] [2022-11-16 19:52:25,234 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:52:25,234 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:52:25,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:52:25,235 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:52:25,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:52:25,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,342 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-16 19:52:25,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-16 19:52:25,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,461 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-16 19:52:25,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-16 19:52:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 57 [2022-11-16 19:52:25,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:25,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:25,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:25,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:25,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:25,760 INFO L321 Elim1Store]: treesize reduction 264, result has 10.8 percent of original size [2022-11-16 19:52:25,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 452 treesize of output 374 [2022-11-16 19:52:25,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:25,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:25,958 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-11-16 19:52:25,958 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 2 case distinctions, treesize of input 94 treesize of output 48 [2022-11-16 19:52:26,006 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:26,006 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 15 treesize of output 15 [2022-11-16 19:52:26,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:26,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:26,136 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-16 19:52:26,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-11-16 19:52:26,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:26,231 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:26,231 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 25 treesize of output 25 [2022-11-16 19:52:26,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:26,271 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:26,271 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 25 treesize of output 25 [2022-11-16 19:52:26,279 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:52:26,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:26,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:26,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:26,395 INFO L321 Elim1Store]: treesize reduction 112, result has 24.8 percent of original size [2022-11-16 19:52:26,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 143 treesize of output 197 [2022-11-16 19:52:26,493 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-16 19:52:26,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 174 treesize of output 171 [2022-11-16 19:52:26,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:26,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:26,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 109 [2022-11-16 19:52:26,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 109 [2022-11-16 19:52:26,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:26,708 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:26,709 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 25 treesize of output 25 [2022-11-16 19:52:26,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:26,738 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:26,739 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 25 treesize of output 25 [2022-11-16 19:52:26,757 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:52:26,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '757#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-16 19:52:26,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:52:26,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:52:26,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-16 19:52:26,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035965187] [2022-11-16 19:52:26,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:52:26,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 19:52:26,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:52:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 19:52:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-16 19:52:26,988 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:27,269 INFO L93 Difference]: Finished difference Result 102 states and 143 transitions. [2022-11-16 19:52:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 19:52:27,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-16 19:52:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:27,271 INFO L225 Difference]: With dead ends: 102 [2022-11-16 19:52:27,271 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 19:52:27,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-11-16 19:52:27,272 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:27,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:52:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 19:52:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-16 19:52:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-16 19:52:27,283 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 37 [2022-11-16 19:52:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:27,284 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-16 19:52:27,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-16 19:52:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 19:52:27,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:27,286 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:27,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:27,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:27,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:52:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:27,494 INFO L85 PathProgramCache]: Analyzing trace with hash -60677844, now seen corresponding path program 4 times [2022-11-16 19:52:27,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:52:27,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747878215] [2022-11-16 19:52:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:27,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:52:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-16 19:52:29,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:52:29,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747878215] [2022-11-16 19:52:29,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747878215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:52:29,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60487400] [2022-11-16 19:52:29,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:52:29,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:29,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:52:29,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:52:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:52:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:30,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 19:52:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-16 19:52:30,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-16 19:52:31,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60487400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:52:31,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584908638] [2022-11-16 19:52:31,263 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:52:31,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:52:31,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:52:31,264 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:52:31,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:52:31,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,360 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-16 19:52:31,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-16 19:52:31,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,500 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-16 19:52:31,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-16 19:52:31,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 57 [2022-11-16 19:52:31,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:31,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:31,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:31,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:31,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:31,792 INFO L321 Elim1Store]: treesize reduction 264, result has 10.8 percent of original size [2022-11-16 19:52:31,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 452 treesize of output 374 [2022-11-16 19:52:31,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:31,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:31,943 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-11-16 19:52:31,944 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 2 case distinctions, treesize of input 94 treesize of output 48 [2022-11-16 19:52:31,986 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:31,987 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 15 treesize of output 15 [2022-11-16 19:52:32,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:32,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:32,117 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-16 19:52:32,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-11-16 19:52:32,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:32,221 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:32,222 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 25 treesize of output 25 [2022-11-16 19:52:32,254 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:32,254 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 15 treesize of output 15 [2022-11-16 19:52:32,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:32,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:32,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:32,443 INFO L321 Elim1Store]: treesize reduction 261, result has 26.1 percent of original size [2022-11-16 19:52:32,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 198 [2022-11-16 19:52:32,642 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-16 19:52:32,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 343 treesize of output 338 [2022-11-16 19:52:32,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:52:32,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 297 treesize of output 298 [2022-11-16 19:52:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:32,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:32,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 602 treesize of output 546 [2022-11-16 19:52:34,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:34,186 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:34,187 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 25 treesize of output 25 [2022-11-16 19:52:34,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:52:34,210 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:52:34,210 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 25 treesize of output 25 [2022-11-16 19:52:34,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:52:34,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1582#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-16 19:52:34,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:52:34,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:52:34,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-16 19:52:34,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954161816] [2022-11-16 19:52:34,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:52:34,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 19:52:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:52:34,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 19:52:34,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 19:52:34,528 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:35,292 INFO L93 Difference]: Finished difference Result 198 states and 275 transitions. [2022-11-16 19:52:35,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 19:52:35,293 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-16 19:52:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:35,295 INFO L225 Difference]: With dead ends: 198 [2022-11-16 19:52:35,295 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 19:52:35,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 19:52:35,298 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:35,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 19:52:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 19:52:35,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-16 19:52:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-11-16 19:52:35,316 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 73 [2022-11-16 19:52:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:35,316 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-11-16 19:52:35,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:35,317 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-11-16 19:52:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-16 19:52:35,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:35,322 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:35,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:35,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:35,531 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:52:35,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:35,532 INFO L85 PathProgramCache]: Analyzing trace with hash -186099028, now seen corresponding path program 5 times [2022-11-16 19:52:35,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:52:35,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553512445] [2022-11-16 19:52:35,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:35,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:52:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-16 19:52:41,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:52:41,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553512445] [2022-11-16 19:52:41,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553512445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:52:41,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262194200] [2022-11-16 19:52:41,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:52:41,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:41,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:52:41,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:52:41,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc0324d-a3ad-427c-b63c-fa3bdaa0e415/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process