./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8099d26797381b80337a430cbea65f80d24d8bb2ab20ef5e1337fe6b0f67d890 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 13:49:41,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:49:41,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:49:41,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:49:41,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:49:41,943 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:49:41,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:49:41,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:49:41,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:49:41,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:49:41,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:49:41,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:49:41,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:49:41,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:49:41,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:49:41,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:49:41,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:49:41,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:49:41,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:49:41,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:49:41,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:49:41,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:49:41,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:49:41,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:49:41,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:49:41,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:49:41,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:49:41,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:49:41,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:49:41,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:49:41,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:49:41,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:49:41,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:49:41,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:49:42,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:49:42,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:49:42,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:49:42,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:49:42,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:49:42,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:49:42,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:49:42,005 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:49:42,028 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:49:42,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:49:42,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:49:42,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:49:42,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:49:42,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:49:42,031 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:49:42,031 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:49:42,031 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:49:42,031 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:49:42,031 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:49:42,032 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:49:42,032 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:49:42,032 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:49:42,032 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:49:42,033 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:49:42,033 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:49:42,033 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:49:42,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:49:42,034 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:49:42,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:49:42,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:49:42,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:49:42,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:49:42,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:49:42,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:49:42,036 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:49:42,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:49:42,036 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:49:42,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:49:42,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:49:42,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:49:42,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:49:42,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:49:42,037 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:49:42,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:49:42,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:49:42,038 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:49:42,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:49:42,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:49:42,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:49:42,039 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_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8099d26797381b80337a430cbea65f80d24d8bb2ab20ef5e1337fe6b0f67d890 [2022-11-23 13:49:42,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:49:42,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:49:42,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:49:42,358 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:49:42,359 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:49:42,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-2.c [2022-11-23 13:49:45,456 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:49:46,342 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:49:46,342 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-2.c [2022-11-23 13:49:46,421 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/data/4174888e2/0c15317cfbf8402599c37ac8c642373b/FLAG5a67e2da2 [2022-11-23 13:49:46,437 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/data/4174888e2/0c15317cfbf8402599c37ac8c642373b [2022-11-23 13:49:46,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:49:46,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:49:46,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:49:46,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:49:46,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:49:46,449 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:46" (1/1) ... [2022-11-23 13:49:46,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d440693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:46, skipping insertion in model container [2022-11-23 13:49:46,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:49:46" (1/1) ... [2022-11-23 13:49:46,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:49:46,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:49:49,087 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_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-2.c[380593,380606] [2022-11-23 13:49:49,117 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_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-2.c[383339,383352] [2022-11-23 13:49:49,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:49:49,353 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:49:50,542 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_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-2.c[380593,380606] [2022-11-23 13:49:50,548 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_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/sv-benchmarks/c/combinations/Problem05_label49+token_ring.06.cil-2.c[383339,383352] [2022-11-23 13:49:50,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:49:50,632 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:49:50,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50 WrapperNode [2022-11-23 13:49:50,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:49:50,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:49:50,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:49:50,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:49:50,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:50,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:51,326 INFO L138 Inliner]: procedures = 56, calls = 59, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 12851 [2022-11-23 13:49:51,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:49:51,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:49:51,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:49:51,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:49:51,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:51,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:51,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:51,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:51,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:51,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:51,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:52,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:52,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:49:52,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:49:52,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:49:52,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:49:52,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (1/1) ... [2022-11-23 13:49:52,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:49:52,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:52,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:49:52,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:49:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:49:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-23 13:49:52,186 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-23 13:49:52,186 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 13:49:52,186 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 13:49:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-23 13:49:52,187 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-23 13:49:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-23 13:49:52,187 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-23 13:49:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-23 13:49:52,187 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-23 13:49:52,187 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-23 13:49:52,188 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-23 13:49:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:49:52,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:49:52,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:49:52,317 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:49:52,319 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:50:01,182 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:50:03,709 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:50:03,709 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-23 13:50:03,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:50:03 BoogieIcfgContainer [2022-11-23 13:50:03,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:50:03,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:50:03,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:50:03,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:50:03,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:49:46" (1/3) ... [2022-11-23 13:50:03,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a05861f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:50:03, skipping insertion in model container [2022-11-23 13:50:03,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:49:50" (2/3) ... [2022-11-23 13:50:03,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a05861f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:50:03, skipping insertion in model container [2022-11-23 13:50:03,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:50:03" (3/3) ... [2022-11-23 13:50:03,723 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.06.cil-2.c [2022-11-23 13:50:03,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:50:03,746 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 13:50:03,827 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:50:03,834 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;@592a6ef1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:50:03,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 13:50:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 13:50:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 13:50:03,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:03,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:03,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1360974215, now seen corresponding path program 1 times [2022-11-23 13:50:03,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:03,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534252167] [2022-11-23 13:50:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:03,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:50:04,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:04,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534252167] [2022-11-23 13:50:04,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534252167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:04,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:50:04,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:50:04,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460793973] [2022-11-23 13:50:04,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:04,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:50:04,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:50:04,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:50:04,410 INFO L87 Difference]: Start difference. First operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 13:50:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:05,407 INFO L93 Difference]: Finished difference Result 3635 states and 7091 transitions. [2022-11-23 13:50:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:50:05,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2022-11-23 13:50:05,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:05,429 INFO L225 Difference]: With dead ends: 3635 [2022-11-23 13:50:05,429 INFO L226 Difference]: Without dead ends: 1869 [2022-11-23 13:50:05,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:50:05,444 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 3581 mSDsluCounter, 3257 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3581 SdHoareTripleChecker+Valid, 6588 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:05,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3581 Valid, 6588 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 13:50:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-11-23 13:50:05,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1868. [2022-11-23 13:50:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1818 states have (on average 1.9405940594059405) internal successors, (3528), 1821 states have internal predecessors, (3528), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-23 13:50:05,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 3600 transitions. [2022-11-23 13:50:05,596 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 3600 transitions. Word has length 49 [2022-11-23 13:50:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:05,597 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 3600 transitions. [2022-11-23 13:50:05,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 13:50:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 3600 transitions. [2022-11-23 13:50:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 13:50:05,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:05,611 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:05,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:50:05,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:05,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1918844684, now seen corresponding path program 1 times [2022-11-23 13:50:05,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:05,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469902259] [2022-11-23 13:50:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:05,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:50:05,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469902259] [2022-11-23 13:50:05,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469902259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:05,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419047228] [2022-11-23 13:50:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:05,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:05,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:05,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:05,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:50:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:06,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:50:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 13:50:06,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:06,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419047228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:06,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:06,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:50:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507251931] [2022-11-23 13:50:06,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:06,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:06,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:06,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:50:06,154 INFO L87 Difference]: Start difference. First operand 1868 states and 3600 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:50:06,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:06,698 INFO L93 Difference]: Finished difference Result 2305 states and 4255 transitions. [2022-11-23 13:50:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:06,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2022-11-23 13:50:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:06,710 INFO L225 Difference]: With dead ends: 2305 [2022-11-23 13:50:06,710 INFO L226 Difference]: Without dead ends: 2083 [2022-11-23 13:50:06,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:50:06,713 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 3411 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:06,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3411 Valid, 3376 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:50:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2022-11-23 13:50:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 2079. [2022-11-23 13:50:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 1987 states have (on average 1.898842476094615) internal successors, (3773), 1991 states have internal predecessors, (3773), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-23 13:50:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 3905 transitions. [2022-11-23 13:50:06,781 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 3905 transitions. Word has length 94 [2022-11-23 13:50:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:06,782 INFO L495 AbstractCegarLoop]: Abstraction has 2079 states and 3905 transitions. [2022-11-23 13:50:06,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:50:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 3905 transitions. [2022-11-23 13:50:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 13:50:06,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:06,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:06,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:06,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:06,994 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:06,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1052706348, now seen corresponding path program 1 times [2022-11-23 13:50:06,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:06,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461673765] [2022-11-23 13:50:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:06,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:50:07,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:07,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461673765] [2022-11-23 13:50:07,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461673765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:07,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578027244] [2022-11-23 13:50:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:07,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:07,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:07,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:07,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:50:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:50:07,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 13:50:07,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578027244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:07,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:07,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:50:07,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313426723] [2022-11-23 13:50:07,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:07,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:07,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:50:07,407 INFO L87 Difference]: Start difference. First operand 2079 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:50:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:08,005 INFO L93 Difference]: Finished difference Result 2932 states and 5176 transitions. [2022-11-23 13:50:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:08,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2022-11-23 13:50:08,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:08,017 INFO L225 Difference]: With dead ends: 2932 [2022-11-23 13:50:08,018 INFO L226 Difference]: Without dead ends: 2499 [2022-11-23 13:50:08,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:50:08,021 INFO L413 NwaCegarLoop]: 3240 mSDtfsCounter, 3417 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3375 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:08,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3375 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:50:08,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-11-23 13:50:08,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2493. [2022-11-23 13:50:08,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2319 states have (on average 1.833117723156533) internal successors, (4251), 2325 states have internal predecessors, (4251), 124 states have call successors, (124), 48 states have call predecessors, (124), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2022-11-23 13:50:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 4499 transitions. [2022-11-23 13:50:08,107 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 4499 transitions. Word has length 94 [2022-11-23 13:50:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:08,108 INFO L495 AbstractCegarLoop]: Abstraction has 2493 states and 4499 transitions. [2022-11-23 13:50:08,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:50:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 4499 transitions. [2022-11-23 13:50:08,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 13:50:08,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:08,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:08,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:08,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:08,319 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1665862324, now seen corresponding path program 1 times [2022-11-23 13:50:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:08,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698459990] [2022-11-23 13:50:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:08,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 13:50:08,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:08,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698459990] [2022-11-23 13:50:08,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698459990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:08,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139230497] [2022-11-23 13:50:08,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:08,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:08,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:08,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:08,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:50:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:08,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:50:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 13:50:08,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:08,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139230497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:08,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:08,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 13:50:08,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641949463] [2022-11-23 13:50:08,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:08,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:08,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:08,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:50:08,701 INFO L87 Difference]: Start difference. First operand 2493 states and 4499 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:50:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:09,305 INFO L93 Difference]: Finished difference Result 4162 states and 6968 transitions. [2022-11-23 13:50:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:09,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2022-11-23 13:50:09,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:09,328 INFO L225 Difference]: With dead ends: 4162 [2022-11-23 13:50:09,329 INFO L226 Difference]: Without dead ends: 3315 [2022-11-23 13:50:09,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:50:09,340 INFO L413 NwaCegarLoop]: 3214 mSDtfsCounter, 3420 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 3349 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:09,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 3349 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:50:09,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2022-11-23 13:50:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3305. [2022-11-23 13:50:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2971 states have (on average 1.7445304611242005) internal successors, (5183), 2981 states have internal predecessors, (5183), 236 states have call successors, (236), 96 states have call predecessors, (236), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2022-11-23 13:50:09,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 5655 transitions. [2022-11-23 13:50:09,487 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 5655 transitions. Word has length 94 [2022-11-23 13:50:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:09,488 INFO L495 AbstractCegarLoop]: Abstraction has 3305 states and 5655 transitions. [2022-11-23 13:50:09,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 13:50:09,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 5655 transitions. [2022-11-23 13:50:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 13:50:09,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:09,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:09,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:09,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:09,707 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:09,707 INFO L85 PathProgramCache]: Analyzing trace with hash 346869204, now seen corresponding path program 1 times [2022-11-23 13:50:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800625734] [2022-11-23 13:50:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:09,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 13:50:09,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:09,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800625734] [2022-11-23 13:50:09,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800625734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:09,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:50:09,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:50:09,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236227425] [2022-11-23 13:50:09,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:09,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:09,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:09,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:50:09,875 INFO L87 Difference]: Start difference. First operand 3305 states and 5655 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:50:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:10,494 INFO L93 Difference]: Finished difference Result 4595 states and 7568 transitions. [2022-11-23 13:50:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:10,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 94 [2022-11-23 13:50:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:10,515 INFO L225 Difference]: With dead ends: 4595 [2022-11-23 13:50:10,515 INFO L226 Difference]: Without dead ends: 3745 [2022-11-23 13:50:10,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:50:10,520 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 73 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:10,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 6482 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:50:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2022-11-23 13:50:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3589. [2022-11-23 13:50:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 3239 states have (on average 1.7409694350108058) internal successors, (5639), 3249 states have internal predecessors, (5639), 244 states have call successors, (244), 104 states have call predecessors, (244), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-11-23 13:50:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 6127 transitions. [2022-11-23 13:50:10,673 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 6127 transitions. Word has length 94 [2022-11-23 13:50:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:10,673 INFO L495 AbstractCegarLoop]: Abstraction has 3589 states and 6127 transitions. [2022-11-23 13:50:10,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:50:10,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 6127 transitions. [2022-11-23 13:50:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 13:50:10,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:10,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:10,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:50:10,681 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:10,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:10,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1955891450, now seen corresponding path program 1 times [2022-11-23 13:50:10,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:10,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082739252] [2022-11-23 13:50:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:10,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-23 13:50:10,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:10,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082739252] [2022-11-23 13:50:10,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082739252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:10,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:50:10,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:50:10,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005800869] [2022-11-23 13:50:10,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:10,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:10,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:10,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:10,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:50:10,780 INFO L87 Difference]: Start difference. First operand 3589 states and 6127 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:50:11,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:11,399 INFO L93 Difference]: Finished difference Result 7402 states and 11820 transitions. [2022-11-23 13:50:11,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:11,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-23 13:50:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:11,425 INFO L225 Difference]: With dead ends: 7402 [2022-11-23 13:50:11,425 INFO L226 Difference]: Without dead ends: 5459 [2022-11-23 13:50:11,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:50:11,434 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 3409 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:11,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3409 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:50:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2022-11-23 13:50:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5433. [2022-11-23 13:50:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 4755 states have (on average 1.6502628811777076) internal successors, (7847), 4773 states have internal predecessors, (7847), 468 states have call successors, (468), 208 states have call predecessors, (468), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2022-11-23 13:50:11,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 8783 transitions. [2022-11-23 13:50:11,899 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 8783 transitions. Word has length 126 [2022-11-23 13:50:11,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:11,900 INFO L495 AbstractCegarLoop]: Abstraction has 5433 states and 8783 transitions. [2022-11-23 13:50:11,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:50:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 8783 transitions. [2022-11-23 13:50:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 13:50:11,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:11,915 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:11,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:50:11,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:11,916 INFO L85 PathProgramCache]: Analyzing trace with hash -129461655, now seen corresponding path program 1 times [2022-11-23 13:50:11,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:11,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236752424] [2022-11-23 13:50:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:11,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-23 13:50:12,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:12,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236752424] [2022-11-23 13:50:12,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236752424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:12,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:50:12,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:50:12,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050098000] [2022-11-23 13:50:12,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:12,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:12,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:12,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:12,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:50:12,035 INFO L87 Difference]: Start difference. First operand 5433 states and 8783 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:50:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:12,908 INFO L93 Difference]: Finished difference Result 12862 states and 19764 transitions. [2022-11-23 13:50:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:12,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-23 13:50:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:12,955 INFO L225 Difference]: With dead ends: 12862 [2022-11-23 13:50:12,955 INFO L226 Difference]: Without dead ends: 9075 [2022-11-23 13:50:12,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:50:12,973 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 3411 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:12,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3411 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:50:12,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2022-11-23 13:50:13,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 9025. [2022-11-23 13:50:13,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 7707 states have (on average 1.5703905540417802) internal successors, (12103), 7741 states have internal predecessors, (12103), 900 states have call successors, (900), 416 states have call predecessors, (900), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2022-11-23 13:50:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13903 transitions. [2022-11-23 13:50:13,566 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13903 transitions. Word has length 126 [2022-11-23 13:50:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:13,568 INFO L495 AbstractCegarLoop]: Abstraction has 9025 states and 13903 transitions. [2022-11-23 13:50:13,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:50:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13903 transitions. [2022-11-23 13:50:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-23 13:50:13,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:13,596 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:13,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 13:50:13,597 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:13,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:13,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1497791086, now seen corresponding path program 1 times [2022-11-23 13:50:13,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:13,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400743890] [2022-11-23 13:50:13,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:13,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-23 13:50:13,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:13,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400743890] [2022-11-23 13:50:13,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400743890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:13,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:50:13,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:50:13,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216904842] [2022-11-23 13:50:13,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:13,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:13,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:13,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:13,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:50:13,706 INFO L87 Difference]: Start difference. First operand 9025 states and 13903 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:50:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:14,857 INFO L93 Difference]: Finished difference Result 23494 states and 35060 transitions. [2022-11-23 13:50:14,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:14,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-23 13:50:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:14,931 INFO L225 Difference]: With dead ends: 23494 [2022-11-23 13:50:14,932 INFO L226 Difference]: Without dead ends: 16115 [2022-11-23 13:50:14,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:50:14,963 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3414 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3414 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:14,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3414 Valid, 3365 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:50:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16115 states. [2022-11-23 13:50:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16115 to 16017. [2022-11-23 13:50:15,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16017 states, 13451 states have (on average 1.5088097539216414) internal successors, (20295), 13517 states have internal predecessors, (20295), 1732 states have call successors, (1732), 832 states have call predecessors, (1732), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2022-11-23 13:50:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16017 states to 16017 states and 23759 transitions. [2022-11-23 13:50:15,886 INFO L78 Accepts]: Start accepts. Automaton has 16017 states and 23759 transitions. Word has length 126 [2022-11-23 13:50:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:15,887 INFO L495 AbstractCegarLoop]: Abstraction has 16017 states and 23759 transitions. [2022-11-23 13:50:15,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:50:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 16017 states and 23759 transitions. [2022-11-23 13:50:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-23 13:50:15,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:15,939 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:15,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:50:15,939 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1659039175, now seen corresponding path program 1 times [2022-11-23 13:50:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:15,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211712562] [2022-11-23 13:50:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:15,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-23 13:50:16,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:16,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211712562] [2022-11-23 13:50:16,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211712562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:16,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819891554] [2022-11-23 13:50:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:16,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:16,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:16,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:16,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:50:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:16,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:50:16,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 13:50:16,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:16,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819891554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:16,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:16,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-23 13:50:16,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054606459] [2022-11-23 13:50:16,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:16,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:16,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:16,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:16,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:50:16,356 INFO L87 Difference]: Start difference. First operand 16017 states and 23759 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:50:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:17,724 INFO L93 Difference]: Finished difference Result 29013 states and 42769 transitions. [2022-11-23 13:50:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:17,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2022-11-23 13:50:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:17,802 INFO L225 Difference]: With dead ends: 29013 [2022-11-23 13:50:17,802 INFO L226 Difference]: Without dead ends: 21635 [2022-11-23 13:50:17,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:50:17,821 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 110 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:17,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 6513 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:50:17,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21635 states. [2022-11-23 13:50:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21635 to 18913. [2022-11-23 13:50:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18913 states, 16155 states have (on average 1.5355617455896007) internal successors, (24807), 16221 states have internal predecessors, (24807), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-11-23 13:50:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18913 states to 18913 states and 28463 transitions. [2022-11-23 13:50:18,782 INFO L78 Accepts]: Start accepts. Automaton has 18913 states and 28463 transitions. Word has length 145 [2022-11-23 13:50:18,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:18,783 INFO L495 AbstractCegarLoop]: Abstraction has 18913 states and 28463 transitions. [2022-11-23 13:50:18,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:50:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 18913 states and 28463 transitions. [2022-11-23 13:50:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-23 13:50:18,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:18,852 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:18,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 13:50:19,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:19,058 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1272632697, now seen corresponding path program 2 times [2022-11-23 13:50:19,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:19,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600644377] [2022-11-23 13:50:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:19,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 13:50:19,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:19,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600644377] [2022-11-23 13:50:19,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600644377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:19,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970039036] [2022-11-23 13:50:19,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:50:19,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:19,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:19,606 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:19,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:50:19,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 13:50:19,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:50:19,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:50:19,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-23 13:50:19,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:19,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970039036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:19,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:19,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 13:50:19,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702112960] [2022-11-23 13:50:19,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:19,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:19,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:19,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:50:19,849 INFO L87 Difference]: Start difference. First operand 18913 states and 28463 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:50:21,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:21,472 INFO L93 Difference]: Finished difference Result 29253 states and 44337 transitions. [2022-11-23 13:50:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:21,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-11-23 13:50:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:21,553 INFO L225 Difference]: With dead ends: 29253 [2022-11-23 13:50:21,553 INFO L226 Difference]: Without dead ends: 18979 [2022-11-23 13:50:21,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:50:21,590 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 141 mSDsluCounter, 3193 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 6518 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:21,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 6518 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:50:21,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18979 states. [2022-11-23 13:50:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18979 to 18849. [2022-11-23 13:50:22,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18849 states, 16091 states have (on average 1.5217823628115095) internal successors, (24487), 16157 states have internal predecessors, (24487), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-11-23 13:50:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18849 states to 18849 states and 28143 transitions. [2022-11-23 13:50:22,493 INFO L78 Accepts]: Start accepts. Automaton has 18849 states and 28143 transitions. Word has length 145 [2022-11-23 13:50:22,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:22,494 INFO L495 AbstractCegarLoop]: Abstraction has 18849 states and 28143 transitions. [2022-11-23 13:50:22,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:50:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 18849 states and 28143 transitions. [2022-11-23 13:50:22,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-23 13:50:22,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:22,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:22,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:22,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 13:50:22,738 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash -792319095, now seen corresponding path program 1 times [2022-11-23 13:50:22,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:22,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997219171] [2022-11-23 13:50:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:22,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 13:50:23,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:23,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997219171] [2022-11-23 13:50:23,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997219171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:23,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991999870] [2022-11-23 13:50:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:23,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:23,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:23,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:23,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:50:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:23,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:50:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 13:50:23,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:23,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991999870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:23,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:23,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 13:50:23,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85431133] [2022-11-23 13:50:23,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:23,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:23,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:23,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:23,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:50:23,336 INFO L87 Difference]: Start difference. First operand 18849 states and 28143 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:50:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:24,714 INFO L93 Difference]: Finished difference Result 27757 states and 41601 transitions. [2022-11-23 13:50:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:24,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2022-11-23 13:50:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:24,784 INFO L225 Difference]: With dead ends: 27757 [2022-11-23 13:50:24,785 INFO L226 Difference]: Without dead ends: 18915 [2022-11-23 13:50:24,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:50:24,812 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 138 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:24,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 6505 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:50:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18915 states. [2022-11-23 13:50:25,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18915 to 18689. [2022-11-23 13:50:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18689 states, 15931 states have (on average 1.5049274998430733) internal successors, (23975), 15997 states have internal predecessors, (23975), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-11-23 13:50:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18689 states to 18689 states and 27631 transitions. [2022-11-23 13:50:25,779 INFO L78 Accepts]: Start accepts. Automaton has 18689 states and 27631 transitions. Word has length 145 [2022-11-23 13:50:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:25,780 INFO L495 AbstractCegarLoop]: Abstraction has 18689 states and 27631 transitions. [2022-11-23 13:50:25,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-23 13:50:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 18689 states and 27631 transitions. [2022-11-23 13:50:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-23 13:50:25,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:25,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:25,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:26,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 13:50:26,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash 319211079, now seen corresponding path program 1 times [2022-11-23 13:50:26,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:26,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102944184] [2022-11-23 13:50:26,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:26,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 13:50:26,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:26,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102944184] [2022-11-23 13:50:26,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102944184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:26,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729962466] [2022-11-23 13:50:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:26,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:26,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:26,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 13:50:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:26,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:50:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 13:50:26,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:26,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729962466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:26,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:26,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 13:50:26,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134842006] [2022-11-23 13:50:26,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:26,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:26,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:50:26,595 INFO L87 Difference]: Start difference. First operand 18689 states and 27631 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:50:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:28,443 INFO L93 Difference]: Finished difference Result 31061 states and 44714 transitions. [2022-11-23 13:50:28,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:28,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-11-23 13:50:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:28,516 INFO L225 Difference]: With dead ends: 31061 [2022-11-23 13:50:28,516 INFO L226 Difference]: Without dead ends: 22459 [2022-11-23 13:50:28,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:50:28,549 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3417 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:28,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3259 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:50:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22459 states. [2022-11-23 13:50:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22459 to 22459. [2022-11-23 13:50:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22459 states, 19321 states have (on average 1.4494591377257906) internal successors, (28005), 19387 states have internal predecessors, (28005), 1954 states have call successors, (1954), 1182 states have call predecessors, (1954), 1182 states have return successors, (1954), 1890 states have call predecessors, (1954), 1954 states have call successors, (1954) [2022-11-23 13:50:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22459 states to 22459 states and 31913 transitions. [2022-11-23 13:50:29,767 INFO L78 Accepts]: Start accepts. Automaton has 22459 states and 31913 transitions. Word has length 145 [2022-11-23 13:50:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:29,768 INFO L495 AbstractCegarLoop]: Abstraction has 22459 states and 31913 transitions. [2022-11-23 13:50:29,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:50:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 22459 states and 31913 transitions. [2022-11-23 13:50:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-23 13:50:29,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:29,808 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:29,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 13:50:30,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:30,014 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:30,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:30,015 INFO L85 PathProgramCache]: Analyzing trace with hash 834571148, now seen corresponding path program 1 times [2022-11-23 13:50:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:30,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680359619] [2022-11-23 13:50:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 13:50:30,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:30,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680359619] [2022-11-23 13:50:30,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680359619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:30,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886574162] [2022-11-23 13:50:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:30,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:30,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:30,395 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:30,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 13:50:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:30,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 13:50:30,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:50:30,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:30,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886574162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:30,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:30,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-23 13:50:30,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532312821] [2022-11-23 13:50:30,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:30,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:50:30,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:50:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:50:30,705 INFO L87 Difference]: Start difference. First operand 22459 states and 31913 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 13:50:34,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:34,021 INFO L93 Difference]: Finished difference Result 64557 states and 89721 transitions. [2022-11-23 13:50:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:50:34,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 146 [2022-11-23 13:50:34,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:34,270 INFO L225 Difference]: With dead ends: 64557 [2022-11-23 13:50:34,270 INFO L226 Difference]: Without dead ends: 43745 [2022-11-23 13:50:34,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 13:50:34,305 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 3435 mSDsluCounter, 3468 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 6825 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:34,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 6825 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:50:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43745 states. [2022-11-23 13:50:36,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43745 to 43679. [2022-11-23 13:50:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43679 states, 37413 states have (on average 1.4130115200598723) internal successors, (52865), 37607 states have internal predecessors, (52865), 3838 states have call successors, (3838), 2362 states have call predecessors, (3838), 2426 states have return successors, (4030), 3710 states have call predecessors, (4030), 3838 states have call successors, (4030) [2022-11-23 13:50:37,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43679 states to 43679 states and 60733 transitions. [2022-11-23 13:50:37,169 INFO L78 Accepts]: Start accepts. Automaton has 43679 states and 60733 transitions. Word has length 146 [2022-11-23 13:50:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:37,170 INFO L495 AbstractCegarLoop]: Abstraction has 43679 states and 60733 transitions. [2022-11-23 13:50:37,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 13:50:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 43679 states and 60733 transitions. [2022-11-23 13:50:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-23 13:50:37,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:37,265 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:37,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:37,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:37,471 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:37,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1521084349, now seen corresponding path program 1 times [2022-11-23 13:50:37,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:37,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121807358] [2022-11-23 13:50:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:37,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-23 13:50:37,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121807358] [2022-11-23 13:50:37,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121807358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108595124] [2022-11-23 13:50:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:37,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:37,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:37,775 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:37,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 13:50:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:37,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:50:37,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 13:50:38,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:38,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108595124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:38,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:38,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-23 13:50:38,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527378993] [2022-11-23 13:50:38,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:38,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:50:38,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:38,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:50:38,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:50:38,023 INFO L87 Difference]: Start difference. First operand 43679 states and 60733 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:50:41,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:41,476 INFO L93 Difference]: Finished difference Result 101577 states and 142240 transitions. [2022-11-23 13:50:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:50:41,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-11-23 13:50:41,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:41,680 INFO L225 Difference]: With dead ends: 101577 [2022-11-23 13:50:41,681 INFO L226 Difference]: Without dead ends: 59545 [2022-11-23 13:50:41,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:50:41,755 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 75 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:41,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 6422 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 13:50:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2022-11-23 13:50:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 49227. [2022-11-23 13:50:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49227 states, 42571 states have (on average 1.438890324399239) internal successors, (61255), 42767 states have internal predecessors, (61255), 4033 states have call successors, (4033), 2557 states have call predecessors, (4033), 2621 states have return successors, (4225), 3903 states have call predecessors, (4225), 4033 states have call successors, (4225) [2022-11-23 13:50:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49227 states to 49227 states and 69513 transitions. [2022-11-23 13:50:44,405 INFO L78 Accepts]: Start accepts. Automaton has 49227 states and 69513 transitions. Word has length 146 [2022-11-23 13:50:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:44,406 INFO L495 AbstractCegarLoop]: Abstraction has 49227 states and 69513 transitions. [2022-11-23 13:50:44,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 13:50:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 49227 states and 69513 transitions. [2022-11-23 13:50:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 13:50:44,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:44,545 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:44,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:44,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 13:50:44,760 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1022035290, now seen corresponding path program 1 times [2022-11-23 13:50:44,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:44,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076426232] [2022-11-23 13:50:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-23 13:50:45,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:50:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076426232] [2022-11-23 13:50:45,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076426232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:50:45,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133443306] [2022-11-23 13:50:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:45,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:50:45,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:50:45,286 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:50:45,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4056d6a8-ccf8-4f00-ab6b-35ed2635a29a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 13:50:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:50:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:50:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:50:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 13:50:45,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:50:45,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133443306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:50:45,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:50:45,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-23 13:50:45,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881602218] [2022-11-23 13:50:45,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:50:45,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:50:45,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:50:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:50:45,646 INFO L87 Difference]: Start difference. First operand 49227 states and 69513 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)