./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 11:46:42,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:46:42,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:46:42,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:46:42,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:46:42,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:46:42,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:46:42,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:46:42,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:46:42,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:46:42,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:46:42,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:46:42,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:46:42,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:46:42,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:46:42,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:46:42,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:46:42,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:46:42,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:46:42,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:46:42,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:46:42,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:46:42,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:46:42,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:46:42,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:46:42,089 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:46:42,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:46:42,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:46:42,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:46:42,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:46:42,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:46:42,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:46:42,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:46:42,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:46:42,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:46:42,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:46:42,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:46:42,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:46:42,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:46:42,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:46:42,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:46:42,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:46:42,117 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:46:42,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:46:42,118 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:46:42,118 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:46:42,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:46:42,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:46:42,123 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:46:42,123 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:46:42,123 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:46:42,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:46:42,124 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:46:42,124 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:46:42,124 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:46:42,124 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:46:42,124 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:46:42,125 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:46:42,125 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:46:42,125 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:46:42,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:46:42,126 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:46:42,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:46:42,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:46:42,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:46:42,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:46:42,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:46:42,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:46:42,127 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:46:42,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:46:42,127 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:46:42,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:46:42,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:46:42,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:46:42,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:46:42,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:46:42,128 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:46:42,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:46:42,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:46:42,128 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:46:42,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:46:42,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:46:42,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:46:42,129 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_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2022-12-14 11:46:42,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:46:42,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:46:42,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:46:42,337 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:46:42,337 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:46:42,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loop-simple/deep-nested.c [2022-12-14 11:46:44,968 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:46:45,112 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:46:45,113 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/sv-benchmarks/c/loop-simple/deep-nested.c [2022-12-14 11:46:45,118 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/data/bdf7e4975/49c469352dc54210a55c35162020b414/FLAG3ebe5f225 [2022-12-14 11:46:45,132 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/data/bdf7e4975/49c469352dc54210a55c35162020b414 [2022-12-14 11:46:45,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:46:45,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:46:45,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:46:45,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:46:45,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:46:45,142 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3377c566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45, skipping insertion in model container [2022-12-14 11:46:45,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:46:45,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:46:45,276 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2022-12-14 11:46:45,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:46:45,290 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:46:45,304 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2022-12-14 11:46:45,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:46:45,317 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:46:45,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45 WrapperNode [2022-12-14 11:46:45,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:46:45,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:46:45,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:46:45,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:46:45,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,342 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-12-14 11:46:45,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:46:45,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:46:45,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:46:45,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:46:45,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,359 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:46:45,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:46:45,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:46:45,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:46:45,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (1/1) ... [2022-12-14 11:46:45,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:46:45,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:45,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:46:45,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:46:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:46:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:46:45,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:46:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:46:45,472 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:46:45,474 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:46:45,580 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:46:45,609 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:46:45,609 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 11:46:45,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:46:45 BoogieIcfgContainer [2022-12-14 11:46:45,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:46:45,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:46:45,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:46:45,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:46:45,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:46:45" (1/3) ... [2022-12-14 11:46:45,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd528cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:46:45, skipping insertion in model container [2022-12-14 11:46:45,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:45" (2/3) ... [2022-12-14 11:46:45,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd528cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:46:45, skipping insertion in model container [2022-12-14 11:46:45,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:46:45" (3/3) ... [2022-12-14 11:46:45,619 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2022-12-14 11:46:45,635 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:46:45,635 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:46:45,676 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:46:45,681 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;@5103ff8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:46:45,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:46:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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) [2022-12-14 11:46:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:46:45,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:45,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:45,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1672362000, now seen corresponding path program 1 times [2022-12-14 11:46:45,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:45,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334867150] [2022-12-14 11:46:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:45,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:46,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:46,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334867150] [2022-12-14 11:46:46,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334867150] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:46,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:46,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:46:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213315954] [2022-12-14 11:46:46,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:46,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:46:46,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:46,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:46:46,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:46:46,047 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-12-14 11:46:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:46,143 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-12-14 11:46:46,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:46:46,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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 [2022-12-14 11:46:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:46,154 INFO L225 Difference]: With dead ends: 24 [2022-12-14 11:46:46,154 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 11:46:46,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:46:46,160 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:46,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:46:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 11:46:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-12-14 11:46:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 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) [2022-12-14 11:46:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-12-14 11:46:46,193 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2022-12-14 11:46:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:46,193 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-12-14 11:46:46,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-12-14 11:46:46,194 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-12-14 11:46:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:46:46,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:46,194 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:46,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:46:46,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:46,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:46,195 INFO L85 PathProgramCache]: Analyzing trace with hash 288176442, now seen corresponding path program 1 times [2022-12-14 11:46:46,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:46,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588350136] [2022-12-14 11:46:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:46,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:46:46,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:46,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588350136] [2022-12-14 11:46:46,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588350136] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:46,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:46,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:46:46,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932925589] [2022-12-14 11:46:46,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:46,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:46:46,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:46,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:46:46,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:46:46,512 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:46,555 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2022-12-14 11:46:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:46:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 11:46:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:46,557 INFO L225 Difference]: With dead ends: 23 [2022-12-14 11:46:46,557 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 11:46:46,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:46:46,559 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:46,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:46:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 11:46:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-12-14 11:46:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 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) [2022-12-14 11:46:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2022-12-14 11:46:46,567 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2022-12-14 11:46:46,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:46,568 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2022-12-14 11:46:46,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2022-12-14 11:46:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 11:46:46,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:46,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:46,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:46:46,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:46,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1127877189, now seen corresponding path program 1 times [2022-12-14 11:46:46,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:46,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624780908] [2022-12-14 11:46:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:46:46,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:46,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624780908] [2022-12-14 11:46:46,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624780908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:46,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337070003] [2022-12-14 11:46:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:46,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:46,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:46,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:46,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:46:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:46,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:46:46,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:46:46,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:46:46,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337070003] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:46,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:46:46,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-12-14 11:46:46,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822870275] [2022-12-14 11:46:46,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:46,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:46:46,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:46,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:46:46,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:46:46,833 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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) [2022-12-14 11:46:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:46,900 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-12-14 11:46:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:46:46,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 13 [2022-12-14 11:46:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:46,901 INFO L225 Difference]: With dead ends: 48 [2022-12-14 11:46:46,901 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 11:46:46,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:46:46,903 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:46,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:46:46,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 11:46:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-12-14 11:46:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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) [2022-12-14 11:46:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-12-14 11:46:46,914 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-12-14 11:46:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:46,914 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-12-14 11:46:46,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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) [2022-12-14 11:46:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-12-14 11:46:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 11:46:46,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:46,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:46,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:46:47,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:47,117 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash -873618584, now seen corresponding path program 1 times [2022-12-14 11:46:47,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:47,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963502263] [2022-12-14 11:46:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:47,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:46:47,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:47,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963502263] [2022-12-14 11:46:47,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963502263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:47,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238938058] [2022-12-14 11:46:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:47,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:47,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:47,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:47,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:46:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:46:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:46:47,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:46:47,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238938058] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:47,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:46:47,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-12-14 11:46:47,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641722408] [2022-12-14 11:46:47,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:47,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:46:47,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:47,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:46:47,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:46:47,330 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:47,402 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2022-12-14 11:46:47,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:46:47,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 11:46:47,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:47,403 INFO L225 Difference]: With dead ends: 56 [2022-12-14 11:46:47,403 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 11:46:47,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:46:47,404 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:47,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:46:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 11:46:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-12-14 11:46:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-12-14 11:46:47,411 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2022-12-14 11:46:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:47,411 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-12-14 11:46:47,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-12-14 11:46:47,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 11:46:47,411 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:47,411 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:47,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:46:47,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:47,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:47,613 INFO L85 PathProgramCache]: Analyzing trace with hash -445424737, now seen corresponding path program 1 times [2022-12-14 11:46:47,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:47,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715951295] [2022-12-14 11:46:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:47,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:46:47,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:47,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715951295] [2022-12-14 11:46:47,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715951295] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:47,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923144099] [2022-12-14 11:46:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:47,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:47,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:47,786 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:47,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:46:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:47,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:46:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:46:47,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:46:47,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923144099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:47,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:46:47,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-12-14 11:46:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570997637] [2022-12-14 11:46:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:47,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:46:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:46:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:46:47,865 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2022-12-14 11:46:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:47,928 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-12-14 11:46:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:46:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 17 [2022-12-14 11:46:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:47,929 INFO L225 Difference]: With dead ends: 58 [2022-12-14 11:46:47,929 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 11:46:47,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:46:47,930 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:47,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:46:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 11:46:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-12-14 11:46:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 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) [2022-12-14 11:46:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-12-14 11:46:47,940 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 17 [2022-12-14 11:46:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:47,940 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-12-14 11:46:47,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2022-12-14 11:46:47,940 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-12-14 11:46:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 11:46:47,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:47,941 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:47,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:46:48,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:48,143 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:48,144 INFO L85 PathProgramCache]: Analyzing trace with hash 781854592, now seen corresponding path program 1 times [2022-12-14 11:46:48,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:48,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645620340] [2022-12-14 11:46:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:46:48,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:48,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645620340] [2022-12-14 11:46:48,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645620340] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:48,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790859041] [2022-12-14 11:46:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:48,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:48,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:48,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:48,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:46:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:48,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:46:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 11:46:48,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 11:46:48,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790859041] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:48,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838722374] [2022-12-14 11:46:48,706 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:46:48,706 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:46:48,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:46:48,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:46:48,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:46:50,391 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:46:50,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '826#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 11:46:50,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:46:50,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:46:50,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-12-14 11:46:50,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770262023] [2022-12-14 11:46:50,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:46:50,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 11:46:50,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:50,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 11:46:50,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:46:50,920 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:52,205 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-12-14 11:46:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 11:46:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 11:46:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:52,206 INFO L225 Difference]: With dead ends: 134 [2022-12-14 11:46:52,206 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 11:46:52,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=472, Invalid=1978, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 11:46:52,208 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 295 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:52,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 5 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:46:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 11:46:52,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2022-12-14 11:46:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2022-12-14 11:46:52,219 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 22 [2022-12-14 11:46:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:52,219 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2022-12-14 11:46:52,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2022-12-14 11:46:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 11:46:52,219 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:52,219 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 11:46:52,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 11:46:52,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 11:46:52,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:52,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:52,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1964626949, now seen corresponding path program 2 times [2022-12-14 11:46:52,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:52,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960271936] [2022-12-14 11:46:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:52,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 11:46:52,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:52,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960271936] [2022-12-14 11:46:52,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960271936] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:52,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424664791] [2022-12-14 11:46:52,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:46:52,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:52,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:52,652 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:52,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:46:52,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 11:46:52,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:46:52,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:46:52,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 11:46:52,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:46:52,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424664791] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:52,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:46:52,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-12-14 11:46:52,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125924279] [2022-12-14 11:46:52,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:52,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:46:52,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:46:52,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:46:52,761 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-12-14 11:46:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:52,809 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-12-14 11:46:52,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:46:52,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 11:46:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:52,810 INFO L225 Difference]: With dead ends: 97 [2022-12-14 11:46:52,811 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 11:46:52,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:46:52,812 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:52,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:46:52,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 11:46:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2022-12-14 11:46:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-12-14 11:46:52,832 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 40 [2022-12-14 11:46:52,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:52,832 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-12-14 11:46:52,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-12-14 11:46:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-12-14 11:46:52,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 11:46:52,833 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:52,833 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-12-14 11:46:52,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:46:53,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:53,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:53,036 INFO L85 PathProgramCache]: Analyzing trace with hash -449471975, now seen corresponding path program 3 times [2022-12-14 11:46:53,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:53,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511743111] [2022-12-14 11:46:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:53,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:53,450 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 11:46:53,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:53,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511743111] [2022-12-14 11:46:53,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511743111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:53,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841591457] [2022-12-14 11:46:53,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:46:53,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:53,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:53,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:53,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:46:53,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:46:53,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:46:53,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:46:53,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 98 proven. 20 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 11:46:53,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 91 proven. 27 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 11:46:53,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841591457] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:53,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340748386] [2022-12-14 11:46:53,708 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:46:53,708 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:46:53,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:46:53,709 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:46:53,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:46:54,496 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:46:55,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1921#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:46:55,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:46:55,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:46:55,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-12-14 11:46:55,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106123548] [2022-12-14 11:46:55,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:46:55,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 11:46:55,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 11:46:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-12-14 11:46:55,110 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) [2022-12-14 11:46:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:55,512 INFO L93 Difference]: Finished difference Result 223 states and 301 transitions. [2022-12-14 11:46:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:46:55,513 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 11:46:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:55,513 INFO L225 Difference]: With dead ends: 223 [2022-12-14 11:46:55,513 INFO L226 Difference]: Without dead ends: 122 [2022-12-14 11:46:55,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:46:55,514 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 59 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:55,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 10 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:46:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-14 11:46:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2022-12-14 11:46:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 110 states have internal predecessors, (130), 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) [2022-12-14 11:46:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-12-14 11:46:55,532 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 50 [2022-12-14 11:46:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:55,532 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-12-14 11:46:55,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) [2022-12-14 11:46:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-12-14 11:46:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 11:46:55,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:55,534 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-12-14 11:46:55,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:46:55,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:55,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:55,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1866736089, now seen corresponding path program 4 times [2022-12-14 11:46:55,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:55,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071951389] [2022-12-14 11:46:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:55,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 15 proven. 209 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-12-14 11:46:56,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:56,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071951389] [2022-12-14 11:46:56,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071951389] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:56,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903759564] [2022-12-14 11:46:56,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:46:56,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:56,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:56,117 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:56,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:46:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:56,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:46:56,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 262 proven. 87 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-12-14 11:46:56,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 260 proven. 89 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-12-14 11:46:56,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903759564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:56,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1912018743] [2022-12-14 11:46:56,556 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:46:56,557 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:46:56,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:46:56,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:46:56,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:46:57,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:46:57,948 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2931#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:46:57,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:46:57,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:46:57,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-14 11:46:57,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086196804] [2022-12-14 11:46:57,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:46:57,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 11:46:57,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:57,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 11:46:57,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-12-14 11:46:57,950 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) [2022-12-14 11:47:03,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:03,573 INFO L93 Difference]: Finished difference Result 644 states and 814 transitions. [2022-12-14 11:47:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 11:47:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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 74 [2022-12-14 11:47:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:03,576 INFO L225 Difference]: With dead ends: 644 [2022-12-14 11:47:03,576 INFO L226 Difference]: Without dead ends: 537 [2022-12-14 11:47:03,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1149, Invalid=6507, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 11:47:03,578 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 437 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:03,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 13 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 11:47:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-12-14 11:47:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 335. [2022-12-14 11:47:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.122754491017964) internal successors, (375), 334 states have internal predecessors, (375), 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) [2022-12-14 11:47:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 375 transitions. [2022-12-14 11:47:03,636 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 375 transitions. Word has length 74 [2022-12-14 11:47:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:03,636 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 375 transitions. [2022-12-14 11:47:03,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) [2022-12-14 11:47:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 375 transitions. [2022-12-14 11:47:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-12-14 11:47:03,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:03,640 INFO L195 NwaCegarLoop]: trace histogram [85, 84, 84, 13, 13, 12, 12, 12, 11, 2, 1, 1, 1, 1] [2022-12-14 11:47:03,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:47:03,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:03,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:47:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:03,844 INFO L85 PathProgramCache]: Analyzing trace with hash -886953154, now seen corresponding path program 5 times [2022-12-14 11:47:03,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:03,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224473237] [2022-12-14 11:47:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:03,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12367 backedges. 60 proven. 1944 refuted. 0 times theorem prover too weak. 10363 trivial. 0 not checked. [2022-12-14 11:47:05,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:05,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224473237] [2022-12-14 11:47:05,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224473237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:05,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732352940] [2022-12-14 11:47:05,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:47:05,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:05,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:05,245 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:05,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:47:05,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 11:47:05,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:47:05,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:47:05,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12367 backedges. 1668 proven. 0 refuted. 0 times theorem prover too weak. 10699 trivial. 0 not checked. [2022-12-14 11:47:05,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:47:05,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732352940] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:47:05,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:47:05,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2022-12-14 11:47:05,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461307739] [2022-12-14 11:47:05,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:47:05,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:47:05,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:05,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:47:05,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:47:05,643 INFO L87 Difference]: Start difference. First operand 335 states and 375 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2022-12-14 11:47:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:05,750 INFO L93 Difference]: Finished difference Result 603 states and 656 transitions. [2022-12-14 11:47:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:47:05,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 332 [2022-12-14 11:47:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:05,754 INFO L225 Difference]: With dead ends: 603 [2022-12-14 11:47:05,754 INFO L226 Difference]: Without dead ends: 601 [2022-12-14 11:47:05,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:47:05,755 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:05,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:47:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-12-14 11:47:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 354. [2022-12-14 11:47:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.1189801699716715) internal successors, (395), 353 states have internal predecessors, (395), 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) [2022-12-14 11:47:05,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 395 transitions. [2022-12-14 11:47:05,819 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 395 transitions. Word has length 332 [2022-12-14 11:47:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:05,820 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 395 transitions. [2022-12-14 11:47:05,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2022-12-14 11:47:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 395 transitions. [2022-12-14 11:47:05,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-12-14 11:47:05,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:05,827 INFO L195 NwaCegarLoop]: trace histogram [91, 90, 90, 14, 13, 13, 12, 12, 11, 2, 1, 1, 1, 1] [2022-12-14 11:47:05,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 11:47:06,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 11:47:06,028 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:47:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:06,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1725027213, now seen corresponding path program 6 times [2022-12-14 11:47:06,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:06,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242571784] [2022-12-14 11:47:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:06,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 61 proven. 2090 refuted. 0 times theorem prover too weak. 11985 trivial. 0 not checked. [2022-12-14 11:47:07,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:07,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242571784] [2022-12-14 11:47:07,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242571784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:07,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520111635] [2022-12-14 11:47:07,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:47:07,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:07,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:07,380 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:07,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:47:07,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:47:07,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:47:07,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 11:47:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 9336 proven. 344 refuted. 0 times theorem prover too weak. 4456 trivial. 0 not checked. [2022-12-14 11:47:07,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 9177 proven. 503 refuted. 0 times theorem prover too weak. 4456 trivial. 0 not checked. [2022-12-14 11:47:08,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520111635] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:08,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [593891854] [2022-12-14 11:47:08,265 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:47:08,265 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:08,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:08,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:08,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:09,160 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:09,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9056#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 11:47:09,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:09,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:47:09,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 42 [2022-12-14 11:47:09,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35320713] [2022-12-14 11:47:09,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:09,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 11:47:09,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:09,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 11:47:09,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 11:47:09,849 INFO L87 Difference]: Start difference. First operand 354 states and 395 transitions. Second operand has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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) [2022-12-14 11:47:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:11,478 INFO L93 Difference]: Finished difference Result 836 states and 969 transitions. [2022-12-14 11:47:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:47:11,478 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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 352 [2022-12-14 11:47:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:11,480 INFO L225 Difference]: With dead ends: 836 [2022-12-14 11:47:11,480 INFO L226 Difference]: Without dead ends: 448 [2022-12-14 11:47:11,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1081 GetRequests, 1023 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=381, Invalid=3159, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 11:47:11,482 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 52 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:11,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 21 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:47:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-12-14 11:47:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 420. [2022-12-14 11:47:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.100238663484487) internal successors, (461), 419 states have internal predecessors, (461), 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) [2022-12-14 11:47:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 461 transitions. [2022-12-14 11:47:11,574 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 461 transitions. Word has length 352 [2022-12-14 11:47:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:11,574 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 461 transitions. [2022-12-14 11:47:11,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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) [2022-12-14 11:47:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 461 transitions. [2022-12-14 11:47:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-12-14 11:47:11,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:11,577 INFO L195 NwaCegarLoop]: trace histogram [113, 112, 112, 14, 13, 13, 12, 12, 11, 2, 1, 1, 1, 1] [2022-12-14 11:47:11,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:47:11,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 11:47:11,779 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:47:11,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1968995647, now seen corresponding path program 7 times [2022-12-14 11:47:11,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:11,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608448649] [2022-12-14 11:47:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:11,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 61 proven. 2921 refuted. 0 times theorem prover too weak. 18117 trivial. 0 not checked. [2022-12-14 11:47:13,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:13,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608448649] [2022-12-14 11:47:13,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608448649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:13,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346345288] [2022-12-14 11:47:13,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:47:13,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:13,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:13,308 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:13,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:47:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:13,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 11:47:13,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 10437 proven. 3365 refuted. 0 times theorem prover too weak. 7297 trivial. 0 not checked. [2022-12-14 11:47:14,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 10435 proven. 3367 refuted. 0 times theorem prover too weak. 7297 trivial. 0 not checked. [2022-12-14 11:47:14,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346345288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:14,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [724538989] [2022-12-14 11:47:14,854 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:47:14,854 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:14,854 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:14,854 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:14,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:15,762 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:16,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13480#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 11:47:16,525 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:16,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:47:16,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 44 [2022-12-14 11:47:16,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148324718] [2022-12-14 11:47:16,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:16,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 11:47:16,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:16,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 11:47:16,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2239, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 11:47:16,527 INFO L87 Difference]: Start difference. First operand 420 states and 461 transitions. Second operand has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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) [2022-12-14 11:49:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:26,227 INFO L93 Difference]: Finished difference Result 2487 states and 2927 transitions. [2022-12-14 11:49:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-12-14 11:49:26,227 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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 418 [2022-12-14 11:49:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:26,231 INFO L225 Difference]: With dead ends: 2487 [2022-12-14 11:49:26,231 INFO L226 Difference]: Without dead ends: 2071 [2022-12-14 11:49:26,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1479 GetRequests, 1218 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26571 ImplicationChecksByTransitivity, 123.5s TimeCoverageRelationStatistics Valid=6881, Invalid=62025, Unknown=0, NotChecked=0, Total=68906 [2022-12-14 11:49:26,238 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1192 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6936 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 7257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 6936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:26,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 23 Invalid, 7257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 6936 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-12-14 11:49:26,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-12-14 11:49:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1290. [2022-12-14 11:49:26,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 1.0698215671062838) internal successors, (1379), 1289 states have internal predecessors, (1379), 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) [2022-12-14 11:49:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1379 transitions. [2022-12-14 11:49:26,459 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1379 transitions. Word has length 418 [2022-12-14 11:49:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:26,460 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 1379 transitions. [2022-12-14 11:49:26,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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) [2022-12-14 11:49:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1379 transitions. [2022-12-14 11:49:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1289 [2022-12-14 11:49:26,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:26,468 INFO L195 NwaCegarLoop]: trace histogram [371, 370, 370, 30, 29, 29, 28, 28, 27, 2, 1, 1, 1, 1] [2022-12-14 11:49:26,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:49:26,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:49:26,669 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:49:26,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:26,669 INFO L85 PathProgramCache]: Analyzing trace with hash 371244403, now seen corresponding path program 8 times [2022-12-14 11:49:26,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:49:26,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111400778] [2022-12-14 11:49:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:26,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:49:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 220300 backedges. 141 proven. 17494 refuted. 0 times theorem prover too weak. 202665 trivial. 0 not checked. [2022-12-14 11:49:32,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:49:32,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111400778] [2022-12-14 11:49:32,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111400778] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:49:32,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144763633] [2022-12-14 11:49:32,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:49:32,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:49:32,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:49:32,721 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:49:32,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:49:32,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:49:32,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:49:32,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:49:32,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 220300 backedges. 0 proven. 110139 refuted. 0 times theorem prover too weak. 110161 trivial. 0 not checked. [2022-12-14 11:49:35,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:37,332 INFO L134 CoverageAnalysis]: Checked inductivity of 220300 backedges. 0 proven. 110139 refuted. 0 times theorem prover too weak. 110161 trivial. 0 not checked. [2022-12-14 11:49:37,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144763633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:37,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425183421] [2022-12-14 11:49:37,335 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:49:37,335 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:49:37,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:49:37,335 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:49:37,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:49:38,258 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:49:38,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27047#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 11:49:38,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:49:38,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:49:38,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 3, 3] total 24 [2022-12-14 11:49:38,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530186021] [2022-12-14 11:49:38,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:49:38,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 11:49:38,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:49:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 11:49:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-12-14 11:49:38,980 INFO L87 Difference]: Start difference. First operand 1290 states and 1379 transitions. Second operand has 25 states, 25 states have (on average 4.44) internal successors, (111), 24 states have internal predecessors, (111), 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) [2022-12-14 11:49:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:45,428 INFO L93 Difference]: Finished difference Result 5992 states and 6845 transitions. [2022-12-14 11:49:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-14 11:49:45,428 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 24 states have internal predecessors, (111), 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 1288 [2022-12-14 11:49:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:45,443 INFO L225 Difference]: With dead ends: 5992 [2022-12-14 11:49:45,444 INFO L226 Difference]: Without dead ends: 4439 [2022-12-14 11:49:45,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3977 GetRequests, 3854 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4903 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1465, Invalid=14035, Unknown=0, NotChecked=0, Total=15500 [2022-12-14 11:49:45,446 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 274 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:45,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 8 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 11:49:45,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2022-12-14 11:49:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 3978. [2022-12-14 11:49:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 1.0550666331405583) internal successors, (4196), 3977 states have internal predecessors, (4196), 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) [2022-12-14 11:49:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 4196 transitions. [2022-12-14 11:49:46,173 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 4196 transitions. Word has length 1288 [2022-12-14 11:49:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:46,174 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 4196 transitions. [2022-12-14 11:49:46,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 24 states have internal predecessors, (111), 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) [2022-12-14 11:49:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 4196 transitions. [2022-12-14 11:49:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3977 [2022-12-14 11:49:46,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:46,239 INFO L195 NwaCegarLoop]: trace histogram [1181, 1180, 1180, 72, 71, 71, 70, 70, 69, 5, 4, 1, 1, 1] [2022-12-14 11:49:46,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:49:46,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 11:49:46,440 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:49:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:46,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1189346262, now seen corresponding path program 9 times [2022-12-14 11:49:46,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:49:46,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919436876] [2022-12-14 11:49:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:46,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:50:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2197978 backedges. 357 proven. 63359 refuted. 0 times theorem prover too weak. 2134262 trivial. 0 not checked. [2022-12-14 11:50:19,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:50:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919436876] [2022-12-14 11:50:19,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919436876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:50:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946964259] [2022-12-14 11:50:19,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:50:19,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:50:19,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:50:19,547 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:50:19,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38330bff-52da-4fd5-9eac-1c6c83d4b0ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:50:20,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:50:20,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:50:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 6057 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-14 11:50:20,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2197978 backedges. 1156213 proven. 30862 refuted. 0 times theorem prover too weak. 1010903 trivial. 0 not checked. [2022-12-14 11:50:23,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2197978 backedges. 1126806 proven. 60269 refuted. 0 times theorem prover too weak. 1010903 trivial. 0 not checked. [2022-12-14 11:50:31,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946964259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:31,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422961827] [2022-12-14 11:50:31,174 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:50:31,174 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:50:31,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:50:31,174 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:50:31,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:50:31,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:50:46,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65301#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:50:46,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:50:46,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:50:46,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 37, 37] total 92 [2022-12-14 11:50:46,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964105941] [2022-12-14 11:50:46,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:50:46,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-12-14 11:50:46,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:50:46,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-12-14 11:50:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=8775, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 11:50:46,021 INFO L87 Difference]: Start difference. First operand 3978 states and 4196 transitions. Second operand has 92 states, 92 states have (on average 3.3152173913043477) internal successors, (305), 92 states have internal predecessors, (305), 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) [2022-12-14 11:51:41,374 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 96 DAG size of output: 21 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:52:14,129 WARN L233 SmtUtils]: Spent 5.40s on a formula simplification. DAG size of input: 95 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:53:05,854 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 87 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:53:39,929 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 82 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:56:09,596 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (+ |c_ULTIMATE.start_main_~uint32_max~0#1| 4294967295) 4294967296))) (and (< 16 .cse0) (< (mod (+ |c_ULTIMATE.start_main_~e~0#1| 15) 4294967296) .cse0) (< (mod (+ 6 |c_ULTIMATE.start_main_~e~0#1|) 4294967296) .cse0) (< (mod (+ 16 |c_ULTIMATE.start_main_~e~0#1|) 4294967296) .cse0) (<= 4294967295 |c_ULTIMATE.start_main_~uint32_max~0#1|) (< (mod (+ 7 |c_ULTIMATE.start_main_~e~0#1|) 4294967296) .cse0) (< (mod (+ |c_ULTIMATE.start_main_~e~0#1| 10) 4294967296) .cse0) (< (mod (+ |c_ULTIMATE.start_main_~e~0#1| 12) 4294967296) .cse0) (< (mod (+ 3 |c_ULTIMATE.start_main_~e~0#1|) 4294967296) .cse0) (< (mod (+ |c_ULTIMATE.start_main_~e~0#1| 11) 4294967296) .cse0) (< 15 (mod |c_ULTIMATE.start_main_~e~0#1| 4294967296)) (< (mod (+ 5 |c_ULTIMATE.start_main_~e~0#1|) 4294967296) .cse0) (< (mod (+ |c_ULTIMATE.start_main_~e~0#1| 4) 4294967296) .cse0) (<= (div (+ |c_ULTIMATE.start_main_~uint32_max~0#1| 4294967294) 4294967296) 1) (< (mod (+ 2 |c_ULTIMATE.start_main_~e~0#1|) 4294967296) .cse0) (< (mod (+ |c_ULTIMATE.start_main_~e~0#1| 8) 4294967296) .cse0) (< (mod (+ 9 |c_ULTIMATE.start_main_~e~0#1|) 4294967296) .cse0) (< (mod (+ |c_ULTIMATE.start_main_~e~0#1| 13) 4294967296) .cse0) (< (mod (+ 14 |c_ULTIMATE.start_main_~e~0#1|) 4294967296) .cse0))) is different from false