./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/nsqm-if.c --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_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/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_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/nsqm-if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/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_2fab3daf-b394-496c-8fbb-56b0548d160a/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 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 --- 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 19:32:55,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:32:55,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:32:56,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:32:56,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:32:56,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:32:56,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:32:56,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:32:56,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:32:56,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:32:56,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:32:56,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:32:56,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:32:56,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:32:56,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:32:56,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:32:56,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:32:56,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:32:56,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:32:56,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:32:56,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:32:56,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:32:56,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:32:56,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:32:56,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:32:56,068 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:32:56,068 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:32:56,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:32:56,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:32:56,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:32:56,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:32:56,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:32:56,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:32:56,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:32:56,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:32:56,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:32:56,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:32:56,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:32:56,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:32:56,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:32:56,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:32:56,082 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 19:32:56,123 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:32:56,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:32:56,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:32:56,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:32:56,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:32:56,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:32:56,126 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:32:56,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:32:56,126 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:32:56,126 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:32:56,128 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:32:56,128 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:32:56,128 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:32:56,128 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:32:56,129 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:32:56,129 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:32:56,129 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:32:56,129 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:32:56,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:32:56,130 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:32:56,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:32:56,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:32:56,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:32:56,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 19:32:56,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:32:56,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 19:32:56,132 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:32:56,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 19:32:56,132 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:32:56,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 19:32:56,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:32:56,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:32:56,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:32:56,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:32:56,134 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:32:56,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:32:56,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 19:32:56,135 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:32:56,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:32:56,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 19:32:56,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:32:56,135 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_2fab3daf-b394-496c-8fbb-56b0548d160a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d7989c0f7330a23b935c06e29a235b3d1d683ab2aa8325b4804307d493787f2 [2022-11-16 19:32:56,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:32:56,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:32:56,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:32:56,447 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:32:56,448 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:32:56,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-fpi/nsqm-if.c [2022-11-16 19:32:56,546 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/data/f637f0145/2092227023b14b8aa30c405d977c0308/FLAGb25434617 [2022-11-16 19:32:57,018 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:32:57,019 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/sv-benchmarks/c/array-fpi/nsqm-if.c [2022-11-16 19:32:57,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/data/f637f0145/2092227023b14b8aa30c405d977c0308/FLAGb25434617 [2022-11-16 19:32:57,412 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/data/f637f0145/2092227023b14b8aa30c405d977c0308 [2022-11-16 19:32:57,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:32:57,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:32:57,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:32:57,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:32:57,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:32:57,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa641eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57, skipping insertion in model container [2022-11-16 19:32:57,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:32:57,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:32:57,673 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_2fab3daf-b394-496c-8fbb-56b0548d160a/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2022-11-16 19:32:57,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:32:57,699 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:32:57,711 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_2fab3daf-b394-496c-8fbb-56b0548d160a/sv-benchmarks/c/array-fpi/nsqm-if.c[590,603] [2022-11-16 19:32:57,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:32:57,733 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:32:57,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57 WrapperNode [2022-11-16 19:32:57,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:32:57,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:32:57,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:32:57,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:32:57,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,749 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,771 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-11-16 19:32:57,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:32:57,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:32:57,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:32:57,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:32:57,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,816 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:32:57,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:32:57,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:32:57,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:32:57,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (1/1) ... [2022-11-16 19:32:57,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:32:57,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:32:57,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:32:57,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:32:57,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:32:57,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:32:57,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:32:57,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 19:32:57,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:32:57,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:32:57,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:32:57,982 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:32:57,984 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:32:58,222 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:32:58,335 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:32:58,336 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 19:32:58,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:32:58 BoogieIcfgContainer [2022-11-16 19:32:58,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:32:58,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:32:58,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:32:58,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:32:58,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:32:57" (1/3) ... [2022-11-16 19:32:58,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@926b1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:32:58, skipping insertion in model container [2022-11-16 19:32:58,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:32:57" (2/3) ... [2022-11-16 19:32:58,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@926b1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:32:58, skipping insertion in model container [2022-11-16 19:32:58,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:32:58" (3/3) ... [2022-11-16 19:32:58,348 INFO L112 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2022-11-16 19:32:58,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:32:58,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 19:32:58,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:32:58,443 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;@7ee0d6ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:32:58,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 19:32:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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 19:32:58,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 19:32:58,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:32:58,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:32:58,458 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:32:58,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:32:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2022-11-16 19:32:58,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:32:58,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017555387] [2022-11-16 19:32:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:32:58,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:32:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:32:58,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:32:58,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017555387] [2022-11-16 19:32:58,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 19:32:58,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617798739] [2022-11-16 19:32:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:32:58,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:32:58,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:32:58,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:32:58,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:32:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:32:58,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:32:58,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:32:58,790 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 19:32:58,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:32:58,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617798739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:32:58,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:32:58,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:32:58,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84324691] [2022-11-16 19:32:58,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:32:58,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:32:58,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:32:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:32:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:32:58,831 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 19:32:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:32:58,920 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2022-11-16 19:32:58,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:32:58,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 19:32:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:32:58,931 INFO L225 Difference]: With dead ends: 20 [2022-11-16 19:32:58,931 INFO L226 Difference]: Without dead ends: 10 [2022-11-16 19:32:58,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 19:32:58,938 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 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, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:32:58,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:32:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-16 19:32:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-16 19:32:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:32:58,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-16 19:32:58,968 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-16 19:32:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:32:58,968 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-16 19:32:58,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 19:32:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-16 19:32:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 19:32:58,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:32:58,970 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:32:58,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:32:59,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:32:59,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:32:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:32:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2022-11-16 19:32:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:32:59,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704738669] [2022-11-16 19:32:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:32:59,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:32:59,242 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:32:59,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851585262] [2022-11-16 19:32:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:32:59,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:32:59,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:32:59,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:32:59,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:32:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:32:59,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:32:59,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:32:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:32:59,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:32:59,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:32:59,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704738669] [2022-11-16 19:32:59,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:32:59,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851585262] [2022-11-16 19:32:59,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851585262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:32:59,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:32:59,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:32:59,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119512784] [2022-11-16 19:32:59,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:32:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:32:59,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:32:59,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:32:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:32:59,343 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:32:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:32:59,380 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-16 19:32:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:32:59,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 19:32:59,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:32:59,381 INFO L225 Difference]: With dead ends: 21 [2022-11-16 19:32:59,382 INFO L226 Difference]: Without dead ends: 16 [2022-11-16 19:32:59,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:32:59,383 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:32:59,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:32:59,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-16 19:32:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2022-11-16 19:32:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:32:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-16 19:32:59,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-16 19:32:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:32:59,389 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-16 19:32:59,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:32:59,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-16 19:32:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:32:59,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:32:59,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:32:59,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:32:59,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 19:32:59,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:32:59,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:32:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2022-11-16 19:32:59,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:32:59,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846649385] [2022-11-16 19:32:59,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:32:59,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:32:59,637 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:32:59,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794954658] [2022-11-16 19:32:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:32:59,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:32:59,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:32:59,639 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:32:59,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:32:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:32:59,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:32:59,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:32:59,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:32:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:32:59,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:00,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:00,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2022-11-16 19:33:00,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:00,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 10 [2022-11-16 19:33:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:33:00,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:00,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846649385] [2022-11-16 19:33:00,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:33:00,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794954658] [2022-11-16 19:33:00,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794954658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:00,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857973772] [2022-11-16 19:33:00,197 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:33:00,198 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:00,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:00,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:00,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:00,412 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-16 19:33:00,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-16 19:33:00,615 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:33:00,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:33:00,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:33:00,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:00,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:00,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:00,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,004 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:33:01,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:33:01,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 136 treesize of output 127 [2022-11-16 19:33:01,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,119 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 113 treesize of output 63 [2022-11-16 19:33:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:33:01,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:33:01,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:01,535 INFO L321 Elim1Store]: treesize reduction 349, result has 7.9 percent of original size [2022-11-16 19:33:01,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 204 [2022-11-16 19:33:01,605 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-16 19:33:01,606 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 153 treesize of output 154 [2022-11-16 19:33:01,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,622 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 62 [2022-11-16 19:33:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:01,643 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 137 treesize of output 38 [2022-11-16 19:33:01,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:01,680 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 63 treesize of output 65 [2022-11-16 19:33:01,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:01,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:01,752 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:01,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:01,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:01,786 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:02,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '202#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:02,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:02,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:33:02,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-16 19:33:02,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033108460] [2022-11-16 19:33:02,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:02,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:33:02,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:02,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:33:02,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:33:02,146 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:02,328 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-16 19:33:02,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:33:02,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:33:02,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:02,331 INFO L225 Difference]: With dead ends: 28 [2022-11-16 19:33:02,332 INFO L226 Difference]: Without dead ends: 26 [2022-11-16 19:33:02,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:33:02,333 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:02,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 18 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:33:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-16 19:33:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 14. [2022-11-16 19:33:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-16 19:33:02,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2022-11-16 19:33:02,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:02,338 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-16 19:33:02,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:02,339 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-16 19:33:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:33:02,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:02,339 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:02,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:02,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:02,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:02,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1258946262, now seen corresponding path program 2 times [2022-11-16 19:33:02,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:02,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143459046] [2022-11-16 19:33:02,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:02,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:02,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:33:02,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498539608] [2022-11-16 19:33:02,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:33:02,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:02,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:02,606 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:02,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:33:02,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:33:02,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:02,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:33:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:02,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:02,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:02,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143459046] [2022-11-16 19:33:02,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:33:02,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498539608] [2022-11-16 19:33:02,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498539608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:02,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [920213] [2022-11-16 19:33:02,757 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:33:02,757 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:02,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:02,758 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:02,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:02,894 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:33:02,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:33:02,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 19:33:02,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:33:03,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:03,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:03,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:03,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:03,179 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:33:03,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:33:03,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 137 [2022-11-16 19:33:03,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:03,437 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 118 treesize of output 66 [2022-11-16 19:33:03,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:03,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:33:03,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:33:03,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:03,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:03,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:03,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:03,678 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:03,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:03,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:03,740 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:03,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:03,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:03,802 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:04,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '336#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:04,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:04,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:33:04,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-16 19:33:04,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160080027] [2022-11-16 19:33:04,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:04,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:33:04,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:04,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:33:04,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:33:04,233 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:04,327 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-16 19:33:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:33:04,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:33:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:04,328 INFO L225 Difference]: With dead ends: 35 [2022-11-16 19:33:04,328 INFO L226 Difference]: Without dead ends: 23 [2022-11-16 19:33:04,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:33:04,329 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:04,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 13 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:33:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-16 19:33:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2022-11-16 19:33:04,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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 19:33:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-16 19:33:04,334 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-11-16 19:33:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:04,334 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-16 19:33:04,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-16 19:33:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:33:04,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:04,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:04,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:04,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:04,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2034389572, now seen corresponding path program 3 times [2022-11-16 19:33:04,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:04,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46283461] [2022-11-16 19:33:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:04,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:04,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:33:04,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321148544] [2022-11-16 19:33:04,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:33:04,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:04,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:04,608 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:04,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:33:04,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:33:04,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 19:33:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:04,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:04,853 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 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 19:33:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:33:04,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:05,057 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 7 treesize of output 5 [2022-11-16 19:33:05,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:05,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2022-11-16 19:33:05,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:05,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 10 [2022-11-16 19:33:05,239 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 38 treesize of output 36 [2022-11-16 19:33:05,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-11-16 19:33:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:33:05,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:05,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46283461] [2022-11-16 19:33:05,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:33:05,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321148544] [2022-11-16 19:33:05,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321148544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:05,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392023806] [2022-11-16 19:33:05,258 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:33:05,258 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:05,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:05,259 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:05,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:05,396 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-16 19:33:05,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-16 19:33:05,527 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:33:05,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:33:05,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:33:05,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:05,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:05,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:05,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:05,778 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:33:05,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:33:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:05,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:05,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 136 treesize of output 127 [2022-11-16 19:33:05,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:05,866 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 113 treesize of output 63 [2022-11-16 19:33:06,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:06,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:33:06,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:33:06,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:06,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:06,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:06,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:06,139 INFO L321 Elim1Store]: treesize reduction 349, result has 7.9 percent of original size [2022-11-16 19:33:06,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 204 [2022-11-16 19:33:06,188 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-16 19:33:06,188 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 153 treesize of output 156 [2022-11-16 19:33:06,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:06,206 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 139 treesize of output 89 [2022-11-16 19:33:06,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:06,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:06,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:06,221 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 139 treesize of output 64 [2022-11-16 19:33:06,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:06,250 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 148 treesize of output 125 [2022-11-16 19:33:06,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:06,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:06,320 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:06,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:06,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:06,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:06,649 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '485#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:06,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:06,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:33:06,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-16 19:33:06,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797963987] [2022-11-16 19:33:06,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:06,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 19:33:06,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:06,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 19:33:06,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:33:06,651 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:06,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:06,817 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-11-16 19:33:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:33:06,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:33:06,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:06,819 INFO L225 Difference]: With dead ends: 34 [2022-11-16 19:33:06,819 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 19:33:06,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:33:06,820 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:06,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-11-16 19:33:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 19:33:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2022-11-16 19:33:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-16 19:33:06,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-11-16 19:33:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:06,826 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-16 19:33:06,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-16 19:33:06,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:33:06,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:06,827 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:06,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:07,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:07,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:07,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1347561873, now seen corresponding path program 4 times [2022-11-16 19:33:07,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:07,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919109184] [2022-11-16 19:33:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:07,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:07,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:33:07,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621839615] [2022-11-16 19:33:07,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:33:07,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:07,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:07,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:07,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:33:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:07,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:33:07,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:07,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:07,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:07,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919109184] [2022-11-16 19:33:07,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:33:07,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621839615] [2022-11-16 19:33:07,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621839615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:07,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [961833803] [2022-11-16 19:33:07,282 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:33:07,283 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:07,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:07,283 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:07,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:07,411 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:33:07,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:33:07,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 19:33:07,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:33:07,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:07,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:07,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:07,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:07,678 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:33:07,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:33:07,786 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-16 19:33:07,787 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 453 treesize of output 440 [2022-11-16 19:33:07,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:07,829 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 113 treesize of output 63 [2022-11-16 19:33:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:07,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:33:07,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:33:08,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:08,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:08,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:08,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:08,054 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:08,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:08,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:08,077 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:08,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '648#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:08,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:08,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:33:08,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-16 19:33:08,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608214606] [2022-11-16 19:33:08,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:08,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 19:33:08,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:08,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 19:33:08,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-16 19:33:08,438 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:08,593 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-11-16 19:33:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:33:08,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 19:33:08,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:08,595 INFO L225 Difference]: With dead ends: 48 [2022-11-16 19:33:08,595 INFO L226 Difference]: Without dead ends: 40 [2022-11-16 19:33:08,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:33:08,597 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:08,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:33:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-16 19:33:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-11-16 19:33:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-16 19:33:08,604 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-11-16 19:33:08,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:08,604 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-16 19:33:08,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-16 19:33:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:33:08,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:08,605 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:08,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 19:33:08,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 19:33:08,811 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash 824116829, now seen corresponding path program 5 times [2022-11-16 19:33:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:08,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9624924] [2022-11-16 19:33:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:08,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:33:08,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165655977] [2022-11-16 19:33:08,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:33:08,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:08,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:08,855 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:08,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:33:09,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:33:09,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 19:33:09,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:09,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:09,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:09,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 19:33:09,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 87 [2022-11-16 19:33:09,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:09,576 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-16 19:33:09,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 97 [2022-11-16 19:33:09,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 12 [2022-11-16 19:33:09,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-11-16 19:33:09,685 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:33:09,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:11,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 187 [2022-11-16 19:33:11,694 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 178 treesize of output 166 [2022-11-16 19:33:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:11,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:12,010 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 7 treesize of output 5 [2022-11-16 19:33:28,101 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 30 treesize of output 28 [2022-11-16 19:33:28,203 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 7 treesize of output 5 [2022-11-16 19:33:30,285 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse12 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse4 (<= .cse12 2147483647)) (.cse11 (* .cse12 8))) (let ((.cse1 (+ .cse11 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse6 (not .cse4)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (+ .cse11 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse2 (+ c_~N~0 1)) (.cse9 (not (= |c_ULTIMATE.start_main_~i~0#1| 0)))) (and (or (forall ((v_ArrVal_254 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_251 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse3 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store (store .cse0 .cse1 v_ArrVal_251) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_254) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3 1) c_~N~0)))) .cse4) (or .cse4 (forall ((v_ArrVal_254 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (v_ArrVal_251 Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse5 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (= (select (store (store .cse0 .cse1 v_ArrVal_251) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_254) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse5)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse5 1) c_~N~0))))) (or .cse6 (and (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse8 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (forall ((v_ArrVal_254 Int) (v_ArrVal_251 Int)) (= (select (store (store .cse0 .cse7 v_ArrVal_251) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_254) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse8)) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse8 1) c_~N~0)))) (or .cse9 (< (+ (* 4294967296 (div (+ (- 1) c_~N~0) 4294967296)) 2147483648) c_~N~0)))) (or .cse6 (and (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse10 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (forall ((v_ArrVal_254 Int) (v_ArrVal_251 Int)) (= (select (store (store .cse0 .cse7 v_ArrVal_251) (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_254) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2)) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse10)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse10 1) c_~N~0)))) .cse9)))))) is different from false [2022-11-16 19:33:30,403 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:30,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2022-11-16 19:33:30,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:30,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 10 [2022-11-16 19:33:30,723 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 186 treesize of output 182 [2022-11-16 19:33:30,805 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 7 treesize of output 5 [2022-11-16 19:33:30,828 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 34 treesize of output 32 [2022-11-16 19:33:30,850 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 30 treesize of output 28 [2022-11-16 19:33:30,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-16 19:33:30,869 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 220 treesize of output 214 [2022-11-16 19:33:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-16 19:33:31,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:31,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9624924] [2022-11-16 19:33:31,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:33:31,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165655977] [2022-11-16 19:33:31,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165655977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:31,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999811068] [2022-11-16 19:33:31,166 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:33:31,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:31,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:31,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:31,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:31,320 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-16 19:33:31,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-16 19:33:31,452 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:33:31,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:33:31,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:33:31,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:31,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:31,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:31,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:31,706 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:33:31,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:33:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:31,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 136 treesize of output 127 [2022-11-16 19:33:31,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:31,788 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 113 treesize of output 63 [2022-11-16 19:33:31,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:31,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:33:31,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:33:31,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:32,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:32,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:32,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:32,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:32,024 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:32,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:32,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:32,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:32,080 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:32,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:32,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:32,130 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:32,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '860#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:32,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:32,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:33:32,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-16 19:33:32,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391431500] [2022-11-16 19:33:32,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:32,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 19:33:32,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 19:33:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=574, Unknown=8, NotChecked=52, Total=812 [2022-11-16 19:33:32,669 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 24 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 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 19:33:46,893 WARN L233 SmtUtils]: Spent 9.79s on a formula simplification. DAG size of input: 86 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:33:48,952 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~N~0 1)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (forall ((|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (or (forall ((v_ArrVal_254 Int)) (= (select (store .cse0 (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_254) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse1)) (< 2147483647 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (forall ((|aux_div_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse2 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse2)) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse2 1) c_~N~0)))) (< |aux_mod_ULTIMATE.start_main_~i~0#1_45| 0))) (forall ((v_ArrVal_254 Int) (|aux_div_ULTIMATE.start_main_~i~0#1_45| Int) (|aux_mod_ULTIMATE.start_main_~i~0#1_45| Int)) (let ((.cse3 (* |aux_div_ULTIMATE.start_main_~i~0#1_45| 4294967296))) (or (<= 4294967296 |aux_mod_ULTIMATE.start_main_~i~0#1_45|) (= (select (store .cse0 (+ (* (mod |aux_mod_ULTIMATE.start_main_~i~0#1_45| 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368)) v_ArrVal_254) |c_ULTIMATE.start_main_~a~0#1.offset|) .cse1) (<= c_~N~0 (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3)) (<= |aux_mod_ULTIMATE.start_main_~i~0#1_45| 2147483647) (< (+ |aux_mod_ULTIMATE.start_main_~i~0#1_45| .cse3 1) c_~N~0)))) (or (= .cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0)))) is different from false [2022-11-16 19:33:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:49,274 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-11-16 19:33:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 19:33:49,275 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 19:33:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:49,276 INFO L225 Difference]: With dead ends: 32 [2022-11-16 19:33:49,276 INFO L226 Difference]: Without dead ends: 30 [2022-11-16 19:33:49,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=251, Invalid=936, Unknown=11, NotChecked=134, Total=1332 [2022-11-16 19:33:49,277 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:49,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 21 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 121 Invalid, 0 Unknown, 30 Unchecked, 0.3s Time] [2022-11-16 19:33:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-16 19:33:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-11-16 19:33:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-16 19:33:49,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 13 [2022-11-16 19:33:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:49,287 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-16 19:33:49,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 23 states have internal predecessors, (25), 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 19:33:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-16 19:33:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:33:49,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:49,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:49,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:49,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 19:33:49,497 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:49,498 INFO L85 PathProgramCache]: Analyzing trace with hash 221349744, now seen corresponding path program 1 times [2022-11-16 19:33:49,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:49,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109816006] [2022-11-16 19:33:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:49,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:49,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:33:49,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201616811] [2022-11-16 19:33:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:49,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:49,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:49,539 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:49,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:33:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:49,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 19:33:49,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:49,740 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 10 treesize of output 8 [2022-11-16 19:33:49,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:33:49,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:49,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-16 19:33:49,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:49,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 36 treesize of output 34 [2022-11-16 19:33:49,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:49,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-11-16 19:33:50,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 35 [2022-11-16 19:33:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:50,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:50,742 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 9 treesize of output 5 [2022-11-16 19:33:52,048 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:52,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2022-11-16 19:33:52,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:52,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2022-11-16 19:33:52,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:52,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 57 [2022-11-16 19:33:52,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:52,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 295 treesize of output 293 [2022-11-16 19:33:52,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:52,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 286 treesize of output 276 [2022-11-16 19:33:52,412 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 6 treesize of output 4 [2022-11-16 19:33:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:52,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:52,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109816006] [2022-11-16 19:33:52,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:33:52,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201616811] [2022-11-16 19:33:52,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201616811] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:52,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [437170346] [2022-11-16 19:33:52,447 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 19:33:52,447 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:52,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:52,448 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:52,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:52,593 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-16 19:33:52,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-16 19:33:52,733 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:33:52,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:33:52,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:33:52,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:52,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:52,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:52,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:52,961 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:33:52,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:33:53,096 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-16 19:33:53,097 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 453 treesize of output 434 [2022-11-16 19:33:53,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,156 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 111 treesize of output 36 [2022-11-16 19:33:53,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:33:53,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:33:53,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:53,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:53,306 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:53,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:53,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:53,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:53,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:53,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:53,370 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:53,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:53,516 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:54,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1073#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:54,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:54,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:33:54,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-16 19:33:54,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989127560] [2022-11-16 19:33:54,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:54,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:33:54,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:54,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:33:54,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=511, Unknown=9, NotChecked=0, Total=600 [2022-11-16 19:33:54,063 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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 19:33:54,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:54,577 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-11-16 19:33:54,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:33:54,578 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:33:54,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:54,579 INFO L225 Difference]: With dead ends: 33 [2022-11-16 19:33:54,579 INFO L226 Difference]: Without dead ends: 23 [2022-11-16 19:33:54,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=95, Invalid=598, Unknown=9, NotChecked=0, Total=702 [2022-11-16 19:33:54,580 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:54,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 25 Unchecked, 0.3s Time] [2022-11-16 19:33:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-16 19:33:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-16 19:33:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-16 19:33:54,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2022-11-16 19:33:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:54,588 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-16 19:33:54,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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 19:33:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-16 19:33:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:33:54,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:54,589 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:54,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:54,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 19:33:54,796 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:54,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:54,796 INFO L85 PathProgramCache]: Analyzing trace with hash -211311242, now seen corresponding path program 6 times [2022-11-16 19:33:54,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:54,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036340784] [2022-11-16 19:33:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:54,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:54,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:33:54,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803197797] [2022-11-16 19:33:54,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:33:54,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:54,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:54,825 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:54,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:33:54,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:33:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:54,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:33:54,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:54,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:33:55,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036340784] [2022-11-16 19:33:55,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:33:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803197797] [2022-11-16 19:33:55,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803197797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883413226] [2022-11-16 19:33:55,077 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:33:55,077 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:55,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:55,078 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:55,078 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:55,204 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:33:55,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:33:55,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 19:33:55,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:33:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:55,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:55,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:55,447 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:33:55,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:33:55,547 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-16 19:33:55,548 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 453 treesize of output 440 [2022-11-16 19:33:55,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:55,584 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 113 treesize of output 63 [2022-11-16 19:33:55,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:55,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:33:55,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:33:55,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:55,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:55,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:55,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:55,830 INFO L321 Elim1Store]: treesize reduction 349, result has 7.9 percent of original size [2022-11-16 19:33:55,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 204 [2022-11-16 19:33:55,859 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 0 case distinctions, treesize of input 105 treesize of output 93 [2022-11-16 19:33:55,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:33:55,884 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 93 treesize of output 95 [2022-11-16 19:33:55,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:55,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:55,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:55,954 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:55,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:55,971 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:56,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1261#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:56,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:56,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:33:56,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-11-16 19:33:56,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22273519] [2022-11-16 19:33:56,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:56,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:33:56,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:56,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:33:56,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:33:56,285 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:56,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:56,596 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-11-16 19:33:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:33:56,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:33:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:56,598 INFO L225 Difference]: With dead ends: 68 [2022-11-16 19:33:56,598 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 19:33:56,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:33:56,599 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:56,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 55 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:33:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 19:33:56,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 31. [2022-11-16 19:33:56,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 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 19:33:56,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-16 19:33:56,615 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 14 [2022-11-16 19:33:56,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:56,615 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-16 19:33:56,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-16 19:33:56,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:33:56,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:56,617 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:56,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:56,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:56,823 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:56,824 INFO L85 PathProgramCache]: Analyzing trace with hash -149523490, now seen corresponding path program 2 times [2022-11-16 19:33:56,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:56,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923070768] [2022-11-16 19:33:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:56,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:56,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:33:56,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519866604] [2022-11-16 19:33:56,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:33:56,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:56,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:56,845 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:56,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:33:57,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:33:57,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:33:57,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:33:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:33:57,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:33:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:33:57,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:33:57,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923070768] [2022-11-16 19:33:57,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:33:57,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519866604] [2022-11-16 19:33:57,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519866604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:33:57,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196113386] [2022-11-16 19:33:57,224 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 19:33:57,224 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:33:57,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:33:57,225 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:33:57,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:33:57,364 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:33:57,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:33:57,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 19:33:57,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:33:57,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:57,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:57,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:57,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:57,605 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:33:57,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:33:57,705 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-16 19:33:57,705 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 401 treesize of output 384 [2022-11-16 19:33:57,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:57,745 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 61 treesize of output 34 [2022-11-16 19:33:57,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:57,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:33:57,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:33:57,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:57,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:57,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:57,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:57,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:33:57,959 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:33:57,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:33:58,105 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:33:58,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1519#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:33:58,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:33:58,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:33:58,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-16 19:33:58,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030311360] [2022-11-16 19:33:58,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:33:58,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 19:33:58,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:33:58,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 19:33:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:33:58,527 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:58,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:33:58,718 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-11-16 19:33:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:33:58,718 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:33:58,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:33:58,719 INFO L225 Difference]: With dead ends: 51 [2022-11-16 19:33:58,719 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 19:33:58,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:33:58,720 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:33:58,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 39 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:33:58,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 19:33:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-11-16 19:33:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 19:33:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-16 19:33:58,729 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2022-11-16 19:33:58,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:33:58,730 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-16 19:33:58,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:33:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-16 19:33:58,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:33:58,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:33:58,731 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:33:58,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:33:58,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 19:33:58,937 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:33:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:33:58,938 INFO L85 PathProgramCache]: Analyzing trace with hash -582184476, now seen corresponding path program 7 times [2022-11-16 19:33:58,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:33:58,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752023150] [2022-11-16 19:33:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:33:58,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:33:58,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:33:58,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789198023] [2022-11-16 19:33:58,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:33:58,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:33:58,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:33:58,977 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:33:58,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 19:33:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:33:59,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 19:33:59,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:33:59,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:33:59,901 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 0 case distinctions, treesize of input 67 treesize of output 60 [2022-11-16 19:33:59,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:59,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:59,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 118 [2022-11-16 19:33:59,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:59,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:59,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 28 [2022-11-16 19:33:59,964 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 0 case distinctions, treesize of input 67 treesize of output 60 [2022-11-16 19:33:59,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:59,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:33:59,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 118 [2022-11-16 19:33:59,978 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 19:34:00,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:00,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 19:34:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:34:00,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:00,255 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 7 treesize of output 5 [2022-11-16 19:34:00,739 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 88 treesize of output 86 [2022-11-16 19:34:00,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:34:00,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 53 [2022-11-16 19:34:01,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:34:01,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 10 [2022-11-16 19:34:01,030 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 914 treesize of output 906 [2022-11-16 19:34:01,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 906 treesize of output 778 [2022-11-16 19:34:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:34:01,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:34:01,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752023150] [2022-11-16 19:34:01,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:34:01,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789198023] [2022-11-16 19:34:01,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789198023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:01,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306778338] [2022-11-16 19:34:01,285 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 19:34:01,286 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:34:01,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:34:01,286 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:34:01,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:34:01,416 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-16 19:34:01,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-16 19:34:01,542 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:34:01,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:34:01,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:34:01,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:01,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:01,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:01,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:01,738 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:34:01,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:34:01,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 137 [2022-11-16 19:34:01,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:01,910 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 118 treesize of output 66 [2022-11-16 19:34:01,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:34:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:02,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:34:02,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:34:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:02,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:02,069 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:34:02,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:34:02,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:34:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:02,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:02,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:02,126 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:34:02,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:34:02,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:34:02,177 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:34:02,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1760#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| (+ ~N~0 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:34:02,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:34:02,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:34:02,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2022-11-16 19:34:02,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690919313] [2022-11-16 19:34:02,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:02,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 19:34:02,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:34:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 19:34:02,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-11-16 19:34:02,678 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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 19:34:03,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:03,170 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-11-16 19:34:03,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 19:34:03,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:34:03,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:03,172 INFO L225 Difference]: With dead ends: 52 [2022-11-16 19:34:03,172 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 19:34:03,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-11-16 19:34:03,173 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:03,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-16 19:34:03,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 19:34:03,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2022-11-16 19:34:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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 19:34:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-16 19:34:03,184 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2022-11-16 19:34:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:03,185 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-16 19:34:03,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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 19:34:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-16 19:34:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:34:03,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:03,186 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:03,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:03,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:03,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:34:03,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:03,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1236512951, now seen corresponding path program 3 times [2022-11-16 19:34:03,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:34:03,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955238390] [2022-11-16 19:34:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:03,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:34:03,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:34:03,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642092624] [2022-11-16 19:34:03,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:34:03,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:03,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:03,436 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:03,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 19:34:03,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:34:03,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 19:34:03,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:03,944 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 10 treesize of output 8 [2022-11-16 19:34:03,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:34:03,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 107 [2022-11-16 19:34:04,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:34:04,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 188 [2022-11-16 19:34:04,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 78 [2022-11-16 19:34:04,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-16 19:34:04,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 46 [2022-11-16 19:34:04,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2022-11-16 19:34:04,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:04,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 76 [2022-11-16 19:34:04,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 45 [2022-11-16 19:34:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:04,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:04,952 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 9 treesize of output 5 [2022-11-16 19:34:07,067 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse14 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse12 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse7 (<= .cse14 2147483647)) (.cse13 (* .cse14 8))) (let ((.cse6 (+ .cse13 |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368))) (.cse0 (not .cse7)) (.cse3 (+ .cse13 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ c_~N~0 4)) (.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse8 (* 8 .cse12)) (.cse10 (<= .cse12 2147483647))) (and (or (let ((.cse1 (+ (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 34359738368) .cse8)) (select .cse9 (+ (- 34359738368) .cse8 |c_ULTIMATE.start_main_~b~0#1.offset|)) 2))) (and (or .cse0 (and (not (= |c_ULTIMATE.start_main_~i~0#1| 0)) (forall ((v_ArrVal_591 Int)) (or (not (<= .cse1 v_ArrVal_591)) (= (select (store .cse2 .cse3 v_ArrVal_591) .cse4) .cse5))))) (or (forall ((v_ArrVal_591 Int)) (or (= .cse5 (select (store .cse2 .cse6 v_ArrVal_591) .cse4)) (not (<= .cse1 v_ArrVal_591)))) .cse7))) .cse10) (or (let ((.cse11 (+ 2 (select .cse9 (+ .cse8 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse8))))) (and (or .cse7 (forall ((v_ArrVal_591 Int)) (or (not (<= .cse11 v_ArrVal_591)) (= .cse5 (select (store .cse2 .cse6 v_ArrVal_591) .cse4))))) (or .cse0 (forall ((v_ArrVal_591 Int)) (or (not (<= .cse11 v_ArrVal_591)) (= (select (store .cse2 .cse3 v_ArrVal_591) .cse4) .cse5)))))) (not .cse10)))))) is different from false [2022-11-16 19:35:55,964 WARN L233 SmtUtils]: Spent 1.57m on a formula simplification. DAG size of input: 145 DAG size of output: 126 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:36:20,341 WARN L233 SmtUtils]: Spent 6.52s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:36:28,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:28,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:28,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 56 [2022-11-16 19:36:28,494 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse19 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) (let ((.cse18 (* .cse19 8))) (let ((.cse17 (mod (+ 4294967295 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (.cse12 (<= .cse19 2147483647)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse4 (+ .cse18 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse9 (+ 2 (select .cse3 .cse4))) (.cse11 (+ .cse18 (- 34359738368) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse1 (not .cse12)) (.cse5 (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse13 (* 8 .cse17)) (.cse0 (<= .cse17 2147483647))) (and (or .cse0 (let ((.cse6 (+ (select .cse3 (+ (- 34359738368) .cse13 |c_ULTIMATE.start_main_~b~0#1.offset|)) 2))) (and (or .cse1 (let ((.cse7 (= |c_ULTIMATE.start_main_~i~0#1| 0))) (and (or (forall ((v_ArrVal_584 Int) (~N~0 Int) (v_ArrVal_579 Int)) (or (= (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (store .cse3 .cse4 v_ArrVal_579) .cse5 v_ArrVal_584)))) (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ ~N~0 1)))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= .cse6 v_ArrVal_579)) (not (<= (+ v_ArrVal_579 2) v_ArrVal_584)))) .cse7) (or (not .cse7) (forall ((v_arrayElimArr_46 (Array Int Int)) (~N~0 Int)) (or (= (select (select (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_arrayElimArr_46))) (store .cse8 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse8 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ ~N~0 1)))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= (+ (select v_arrayElimArr_46 .cse4) 2) (select v_arrayElimArr_46 .cse5))))))))) (or (forall ((v_ArrVal_584 Int) (~N~0 Int) (v_ArrVal_579 Int)) (or (not (<= .cse6 v_ArrVal_579)) (not (<= .cse9 v_ArrVal_584)) (= (select (select (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (store .cse3 .cse11 v_ArrVal_579) .cse5 v_ArrVal_584)))) (store .cse10 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse10 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ ~N~0 1)))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) .cse12)))) (or (let ((.cse14 (+ 2 (select .cse3 (+ .cse13 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (and (or (forall ((v_ArrVal_584 Int) (~N~0 Int) (v_ArrVal_579 Int)) (or (not (<= .cse14 v_ArrVal_579)) (not (<= .cse9 v_ArrVal_584)) (= (select (select (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (store .cse3 .cse11 v_ArrVal_579) .cse5 v_ArrVal_584)))) (store .cse15 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse15 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ ~N~0 1)))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) .cse12) (or .cse1 (forall ((v_ArrVal_584 Int) (~N~0 Int) (v_ArrVal_579 Int)) (or (= (select (select (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (store (store .cse3 .cse4 v_ArrVal_579) .cse5 v_ArrVal_584)))) (store .cse16 |c_ULTIMATE.start_main_~a~0#1.base| (store (select .cse16 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (+ ~N~0 1)))) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= .cse14 v_ArrVal_579)) (not (<= (+ v_ArrVal_579 2) v_ArrVal_584))))))) (not .cse0))))))) is different from false [2022-11-16 19:36:28,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:28,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2022-11-16 19:36:28,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:28,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2022-11-16 19:36:29,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:29,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 71 [2022-11-16 19:36:29,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:29,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 101 treesize of output 92 [2022-11-16 19:36:29,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:29,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 70 [2022-11-16 19:36:29,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:29,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 91 [2022-11-16 19:36:29,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:29,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2193 treesize of output 2171 [2022-11-16 19:36:29,752 INFO L321 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2022-11-16 19:36:29,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2164 treesize of output 2148 [2022-11-16 19:36:29,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:29,849 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 2127 treesize of output 2130 [2022-11-16 19:36:29,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:29,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 2109 treesize of output 2092 [2022-11-16 19:36:29,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:29,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:30,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:30,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 2071 treesize of output 2067 [2022-11-16 19:36:30,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:30,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:30,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:30,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:30,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 2034 treesize of output 2031 [2022-11-16 19:36:33,889 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 6 treesize of output 4 [2022-11-16 19:36:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-16 19:36:37,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:36:37,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955238390] [2022-11-16 19:36:37,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:36:37,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642092624] [2022-11-16 19:36:37,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642092624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:37,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1245211853] [2022-11-16 19:36:37,095 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 19:36:37,095 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:36:37,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:36:37,096 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:36:37,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:36:37,235 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:36:37,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:36:37,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 19:36:37,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:36:37,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:37,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:37,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:37,474 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:36:37,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:36:37,576 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-16 19:36:37,577 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 453 treesize of output 436 [2022-11-16 19:36:37,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:37,586 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 113 treesize of output 63 [2022-11-16 19:36:37,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:36:37,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:37,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:36:37,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:36:37,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:37,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:37,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:37,774 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:36:37,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:36:37,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:36:37,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:36:37,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:37,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:37,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:37,857 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:36:37,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:36:38,007 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:36:38,746 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2027#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:36:38,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:36:38,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:36:38,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-16 19:36:38,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470338916] [2022-11-16 19:36:38,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:36:38,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 19:36:38,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:36:38,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 19:36:38,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=590, Unknown=26, NotChecked=102, Total=812 [2022-11-16 19:36:38,748 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:39,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:36:39,884 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-11-16 19:36:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:36:39,885 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 19:36:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:36:39,885 INFO L225 Difference]: With dead ends: 41 [2022-11-16 19:36:39,885 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 19:36:39,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 143.8s TimeCoverageRelationStatistics Valid=108, Invalid=686, Unknown=26, NotChecked=110, Total=930 [2022-11-16 19:36:39,887 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:36:39,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-11-16 19:36:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 19:36:39,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-16 19:36:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-16 19:36:39,900 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 16 [2022-11-16 19:36:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:36:39,900 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-16 19:36:39,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-16 19:36:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 19:36:39,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:36:39,901 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:36:39,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 19:36:40,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 19:36:40,103 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:36:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:36:40,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1309620645, now seen corresponding path program 4 times [2022-11-16 19:36:40,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:36:40,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632758147] [2022-11-16 19:36:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:36:40,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:36:40,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:36:40,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476709149] [2022-11-16 19:36:40,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:36:40,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:40,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:36:40,133 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:36:40,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 19:36:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:36:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:36:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:36:40,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:36:40,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:36:40,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632758147] [2022-11-16 19:36:40,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:36:40,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476709149] [2022-11-16 19:36:40,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476709149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:40,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1910624090] [2022-11-16 19:36:40,412 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 19:36:40,412 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:36:40,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:36:40,412 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:36:40,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:36:40,538 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 19:36:40,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 19:36:40,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 19:36:40,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:36:40,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:40,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:40,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:40,746 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-11-16 19:36:40,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-11-16 19:36:40,867 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-16 19:36:40,867 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 453 treesize of output 436 [2022-11-16 19:36:40,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:40,877 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 113 treesize of output 63 [2022-11-16 19:36:40,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:40,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-11-16 19:36:40,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:36:41,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:36:41,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:36:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:41,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:41,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:41,073 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:36:41,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2022-11-16 19:36:41,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:36:41,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2277#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 19:36:41,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:36:41,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 19:36:41,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-16 19:36:41,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810110580] [2022-11-16 19:36:41,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 19:36:41,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 19:36:41,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:36:41,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 19:36:41,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:36:41,640 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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 19:36:42,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:36:42,091 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-11-16 19:36:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 19:36:42,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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 17 [2022-11-16 19:36:42,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:36:42,092 INFO L225 Difference]: With dead ends: 66 [2022-11-16 19:36:42,092 INFO L226 Difference]: Without dead ends: 56 [2022-11-16 19:36:42,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-11-16 19:36:42,093 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:36:42,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 78 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:36:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-16 19:36:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2022-11-16 19:36:42,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-16 19:36:42,105 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2022-11-16 19:36:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:36:42,106 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-16 19:36:42,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 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 19:36:42,106 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-16 19:36:42,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:36:42,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:36:42,107 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:36:42,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-16 19:36:42,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 19:36:42,312 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 19:36:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:36:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -774659120, now seen corresponding path program 5 times [2022-11-16 19:36:42,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:36:42,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800547012] [2022-11-16 19:36:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:36:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:36:42,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 19:36:42,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018122071] [2022-11-16 19:36:42,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:36:42,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:36:42,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:36:42,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fab3daf-b394-496c-8fbb-56b0548d160a/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 19:36:43,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 19:36:43,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:43,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 19:36:43,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:43,127 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 10 treesize of output 8 [2022-11-16 19:36:43,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:36:43,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 58 [2022-11-16 19:36:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-16 19:36:43,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 19:36:43,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 58 [2022-11-16 19:36:43,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-11-16 19:36:43,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 26 [2022-11-16 19:36:43,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 19:36:43,590 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-16 19:36:43,591 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 151 treesize of output 139 [2022-11-16 19:36:43,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:43,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 214 [2022-11-16 19:36:43,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 52 [2022-11-16 19:36:43,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,724 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:36:43,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 48 [2022-11-16 19:36:43,829 INFO L321 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2022-11-16 19:36:43,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 114 [2022-11-16 19:36:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,861 INFO L321 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-11-16 19:36:43,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 109 [2022-11-16 19:36:43,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:43,984 INFO L321 Elim1Store]: treesize reduction 54, result has 37.9 percent of original size [2022-11-16 19:36:43,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 56 [2022-11-16 19:36:44,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 59 [2022-11-16 19:36:44,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:44,093 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 33 treesize of output 27 [2022-11-16 19:36:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:44,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:54,678 WARN L233 SmtUtils]: Spent 5.53s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:36:54,876 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 32 treesize of output 28 [2022-11-16 19:36:54,891 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 9 treesize of output 5 [2022-11-16 19:37:15,379 WARN L233 SmtUtils]: Spent 16.13s on a formula simplification. DAG size of input: 70 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:37:15,756 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 36 treesize of output 32 [2022-11-16 19:37:15,773 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 82 treesize of output 78 [2022-11-16 19:38:48,670 WARN L233 SmtUtils]: Spent 1.37m on a formula simplification. DAG size of input: 130 DAG size of output: 76 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:39:02,068 WARN L233 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:39:04,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:04,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 94 treesize of output 76 [2022-11-16 19:39:07,574 INFO L321 Elim1Store]: treesize reduction 47, result has 38.2 percent of original size [2022-11-16 19:39:07,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 90 [2022-11-16 19:39:22,033 WARN L233 SmtUtils]: Spent 9.31s on a formula simplification. DAG size of input: 156 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:39:22,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:22,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2022-11-16 19:39:22,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:22,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2022-11-16 19:39:22,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:22,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 6635 treesize of output 4210 [2022-11-16 19:39:22,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:22,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:22,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:22,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:22,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:22,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:23,633 INFO L321 Elim1Store]: treesize reduction 115, result has 47.0 percent of original size [2022-11-16 19:39:23,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 18 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 6524 treesize of output 4545