./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.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_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/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_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/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_d3345630-0714-4d9f-bd58-557405b3b125/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 e81bb624b13c4231a79ab1bd2052849a1a89cc393bc6bb2c02746b61da23cad6 --- 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 15:08:18,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:08:18,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:08:18,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:08:18,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:08:18,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:08:18,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:08:18,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:08:18,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:08:18,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:08:18,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:08:18,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:08:18,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:08:18,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:08:18,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:08:18,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:08:18,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:08:18,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:08:18,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:08:18,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:08:18,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:08:18,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:08:18,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:08:18,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:08:18,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:08:18,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:08:18,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:08:18,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:08:18,634 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:08:18,635 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:08:18,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:08:18,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:08:18,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:08:18,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:08:18,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:08:18,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:08:18,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:08:18,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:08:18,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:08:18,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:08:18,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:08:18,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:08:18,674 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:08:18,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:08:18,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:08:18,675 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:08:18,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:08:18,676 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:08:18,677 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:08:18,677 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:08:18,677 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:08:18,678 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:08:18,678 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:08:18,678 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:08:18,678 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:08:18,679 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:08:18,679 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:08:18,679 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:08:18,680 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:08:18,680 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:08:18,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:08:18,681 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:08:18,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:08:18,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:08:18,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:08:18,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:08:18,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:08:18,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:08:18,683 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:08:18,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:08:18,683 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:08:18,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:08:18,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:08:18,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:08:18,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:08:18,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:08:18,684 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:08:18,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:08:18,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:08:18,685 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:08:18,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:08:18,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:08:18,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:08:18,686 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_d3345630-0714-4d9f-bd58-557405b3b125/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e81bb624b13c4231a79ab1bd2052849a1a89cc393bc6bb2c02746b61da23cad6 [2022-11-23 15:08:18,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:08:19,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:08:19,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:08:19,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:08:19,021 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:08:19,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c [2022-11-23 15:08:22,060 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:08:22,938 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:08:22,938 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c [2022-11-23 15:08:23,002 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/data/c297466b1/f9450ddda39e43c4b7227d5cb977f7d6/FLAG7131844d2 [2022-11-23 15:08:23,020 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/data/c297466b1/f9450ddda39e43c4b7227d5cb977f7d6 [2022-11-23 15:08:23,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:08:23,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:08:23,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:08:23,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:08:23,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:08:23,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:08:23" (1/1) ... [2022-11-23 15:08:23,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@159f277d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:23, skipping insertion in model container [2022-11-23 15:08:23,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:08:23" (1/1) ... [2022-11-23 15:08:23,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:08:23,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:08:25,579 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_d3345630-0714-4d9f-bd58-557405b3b125/sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c[377069,377082] [2022-11-23 15:08:25,613 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_d3345630-0714-4d9f-bd58-557405b3b125/sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c[383339,383352] [2022-11-23 15:08:25,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:08:25,986 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:08:27,216 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_d3345630-0714-4d9f-bd58-557405b3b125/sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c[377069,377082] [2022-11-23 15:08:27,226 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_d3345630-0714-4d9f-bd58-557405b3b125/sv-benchmarks/c/combinations/Problem05_label40+token_ring.12.cil-2.c[383339,383352] [2022-11-23 15:08:27,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:08:27,331 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:08:27,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27 WrapperNode [2022-11-23 15:08:27,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:08:27,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:08:27,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:08:27,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:08:27,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:27,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:27,868 INFO L138 Inliner]: procedures = 68, calls = 77, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 13199 [2022-11-23 15:08:27,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:08:27,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:08:27,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:08:27,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:08:27,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:27,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:27,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:27,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:28,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:28,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:28,283 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:28,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:28,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:08:28,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:08:28,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:08:28,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:08:28,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (1/1) ... [2022-11-23 15:08:28,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:08:28,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:28,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:08:28,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:08:28,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:08:28,554 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-23 15:08:28,554 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-23 15:08:28,554 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-23 15:08:28,555 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-23 15:08:28,555 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-23 15:08:28,555 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-23 15:08:28,555 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-23 15:08:28,555 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-23 15:08:28,555 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-23 15:08:28,556 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-23 15:08:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-23 15:08:28,556 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-23 15:08:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:08:28,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:08:28,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:08:28,780 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:08:28,785 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:08:38,087 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:08:40,519 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:08:40,519 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-23 15:08:40,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:08:40 BoogieIcfgContainer [2022-11-23 15:08:40,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:08:40,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:08:40,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:08:40,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:08:40,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:08:23" (1/3) ... [2022-11-23 15:08:40,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4018a317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:08:40, skipping insertion in model container [2022-11-23 15:08:40,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:08:27" (2/3) ... [2022-11-23 15:08:40,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4018a317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:08:40, skipping insertion in model container [2022-11-23 15:08:40,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:08:40" (3/3) ... [2022-11-23 15:08:40,536 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.12.cil-2.c [2022-11-23 15:08:40,558 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:08:40,558 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 15:08:40,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:08:40,665 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;@65d5172e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:08:40,665 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 15:08:40,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 1831 states, 1796 states have (on average 1.9560133630289531) internal successors, (3513), 1799 states have internal predecessors, (3513), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-23 15:08:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 15:08:40,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:40,691 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:08:40,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1783080916, now seen corresponding path program 1 times [2022-11-23 15:08:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:40,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509031424] [2022-11-23 15:08:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:40,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:40,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:41,360 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 15:08:41,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:41,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509031424] [2022-11-23 15:08:41,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509031424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:41,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:08:41,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:08:41,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126887821] [2022-11-23 15:08:41,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:41,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:08:41,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:41,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:08:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:08:41,418 INFO L87 Difference]: Start difference. First operand has 1831 states, 1796 states have (on average 1.9560133630289531) internal successors, (3513), 1799 states have internal predecessors, (3513), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 15:08:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:42,764 INFO L93 Difference]: Finished difference Result 3833 states and 7427 transitions. [2022-11-23 15:08:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:08:42,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 67 [2022-11-23 15:08:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:42,793 INFO L225 Difference]: With dead ends: 3833 [2022-11-23 15:08:42,794 INFO L226 Difference]: Without dead ends: 2001 [2022-11-23 15:08:42,810 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 15:08:42,814 INFO L413 NwaCegarLoop]: 3511 mSDtfsCounter, 3779 mSDsluCounter, 3413 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3779 SdHoareTripleChecker+Valid, 6924 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:42,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3779 Valid, 6924 Invalid, 740 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:08:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-11-23 15:08:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 2000. [2022-11-23 15:08:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1938 states have (on average 1.9195046439628483) internal successors, (3720), 1941 states have internal predecessors, (3720), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-23 15:08:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 3816 transitions. [2022-11-23 15:08:42,990 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 3816 transitions. Word has length 67 [2022-11-23 15:08:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:42,991 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 3816 transitions. [2022-11-23 15:08:42,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 15:08:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 3816 transitions. [2022-11-23 15:08:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:08:43,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:43,008 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, 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] [2022-11-23 15:08:43,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:08:43,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash 905646151, now seen corresponding path program 1 times [2022-11-23 15:08:43,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:43,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404648364] [2022-11-23 15:08:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:43,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:08:43,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:43,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404648364] [2022-11-23 15:08:43,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404648364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:43,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802942284] [2022-11-23 15:08:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:43,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:43,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:43,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:43,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:08:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:43,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:43,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:08:43,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:43,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802942284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:43,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:43,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:08:43,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251176218] [2022-11-23 15:08:43,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:43,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:43,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:43,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:43,869 INFO L87 Difference]: Start difference. First operand 2000 states and 3816 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 15:08:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:44,424 INFO L93 Difference]: Finished difference Result 2701 states and 4915 transitions. [2022-11-23 15:08:44,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:44,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 136 [2022-11-23 15:08:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:44,441 INFO L225 Difference]: With dead ends: 2701 [2022-11-23 15:08:44,442 INFO L226 Difference]: Without dead ends: 2347 [2022-11-23 15:08:44,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 15:08:44,446 INFO L413 NwaCegarLoop]: 3343 mSDtfsCounter, 3507 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:44,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3568 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:08:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2022-11-23 15:08:44,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2343. [2022-11-23 15:08:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2227 states have (on average 1.8666367310282892) internal successors, (4157), 2231 states have internal predecessors, (4157), 90 states have call successors, (90), 24 states have call predecessors, (90), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-11-23 15:08:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4337 transitions. [2022-11-23 15:08:44,565 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4337 transitions. Word has length 136 [2022-11-23 15:08:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:44,565 INFO L495 AbstractCegarLoop]: Abstraction has 2343 states and 4337 transitions. [2022-11-23 15:08:44,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 15:08:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4337 transitions. [2022-11-23 15:08:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:08:44,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:44,577 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, 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] [2022-11-23 15:08:44,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:08:44,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:44,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:44,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1448726681, now seen corresponding path program 1 times [2022-11-23 15:08:44,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:44,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246823298] [2022-11-23 15:08:44,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:44,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:08:45,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:45,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246823298] [2022-11-23 15:08:45,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246823298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:45,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423494571] [2022-11-23 15:08:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:45,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:45,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:45,199 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:45,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:08:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:45,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:45,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 15:08:45,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:45,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423494571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:45,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:45,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:08:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436058479] [2022-11-23 15:08:45,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:45,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:45,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:45,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:45,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:45,562 INFO L87 Difference]: Start difference. First operand 2343 states and 4337 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 15:08:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:46,192 INFO L93 Difference]: Finished difference Result 3724 states and 6496 transitions. [2022-11-23 15:08:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 136 [2022-11-23 15:08:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:46,207 INFO L225 Difference]: With dead ends: 3724 [2022-11-23 15:08:46,207 INFO L226 Difference]: Without dead ends: 3027 [2022-11-23 15:08:46,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 15:08:46,212 INFO L413 NwaCegarLoop]: 3342 mSDtfsCounter, 3525 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:46,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 3567 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:08:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2022-11-23 15:08:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 3021. [2022-11-23 15:08:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 2799 states have (on average 1.7931404072883173) internal successors, (5019), 2805 states have internal predecessors, (5019), 172 states have call successors, (172), 48 states have call predecessors, (172), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-11-23 15:08:46,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 5363 transitions. [2022-11-23 15:08:46,343 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 5363 transitions. Word has length 136 [2022-11-23 15:08:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:46,344 INFO L495 AbstractCegarLoop]: Abstraction has 3021 states and 5363 transitions. [2022-11-23 15:08:46,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 15:08:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 5363 transitions. [2022-11-23 15:08:46,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:08:46,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:46,350 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, 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] [2022-11-23 15:08:46,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:46,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 15:08:46,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash -4995449, now seen corresponding path program 1 times [2022-11-23 15:08:46,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:46,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791821270] [2022-11-23 15:08:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:46,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:08:46,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:46,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791821270] [2022-11-23 15:08:46,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791821270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:46,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392104976] [2022-11-23 15:08:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:46,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:46,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:46,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:46,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:08:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:47,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 15:08:47,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:47,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392104976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:47,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:47,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:08:47,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557666729] [2022-11-23 15:08:47,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:47,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:47,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:47,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:47,089 INFO L87 Difference]: Start difference. First operand 3021 states and 5363 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 15:08:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:47,683 INFO L93 Difference]: Finished difference Result 5746 states and 9608 transitions. [2022-11-23 15:08:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 136 [2022-11-23 15:08:47,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:47,704 INFO L225 Difference]: With dead ends: 5746 [2022-11-23 15:08:47,704 INFO L226 Difference]: Without dead ends: 4371 [2022-11-23 15:08:47,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 15:08:47,711 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3519 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:47,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:08:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-11-23 15:08:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4361. [2022-11-23 15:08:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4361 states, 3931 states have (on average 1.709234291528873) internal successors, (6719), 3941 states have internal predecessors, (6719), 332 states have call successors, (332), 96 states have call predecessors, (332), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-11-23 15:08:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4361 states to 4361 states and 7383 transitions. [2022-11-23 15:08:47,900 INFO L78 Accepts]: Start accepts. Automaton has 4361 states and 7383 transitions. Word has length 136 [2022-11-23 15:08:47,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:47,901 INFO L495 AbstractCegarLoop]: Abstraction has 4361 states and 7383 transitions. [2022-11-23 15:08:47,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 15:08:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4361 states and 7383 transitions. [2022-11-23 15:08:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:08:47,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:47,909 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, 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] [2022-11-23 15:08:47,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:48,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:48,116 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:48,116 INFO L85 PathProgramCache]: Analyzing trace with hash -116836953, now seen corresponding path program 1 times [2022-11-23 15:08:48,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:48,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464122186] [2022-11-23 15:08:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:08:48,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:48,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464122186] [2022-11-23 15:08:48,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464122186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:48,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123750246] [2022-11-23 15:08:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:48,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:48,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:48,303 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:48,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:08:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:48,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-23 15:08:48,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:48,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123750246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:48,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:48,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:08:48,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060318316] [2022-11-23 15:08:48,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:48,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:48,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:48,723 INFO L87 Difference]: Start difference. First operand 4361 states and 7383 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 15:08:49,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:49,378 INFO L93 Difference]: Finished difference Result 9742 states and 15732 transitions. [2022-11-23 15:08:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:49,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 136 [2022-11-23 15:08:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:49,412 INFO L225 Difference]: With dead ends: 9742 [2022-11-23 15:08:49,412 INFO L226 Difference]: Without dead ends: 7027 [2022-11-23 15:08:49,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 15:08:49,426 INFO L413 NwaCegarLoop]: 3340 mSDtfsCounter, 3528 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 3565 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:49,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3528 Valid, 3565 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:08:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7027 states. [2022-11-23 15:08:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7027 to 7009. [2022-11-23 15:08:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7009 states, 6171 states have (on average 1.631988332523092) internal successors, (10071), 6189 states have internal predecessors, (10071), 644 states have call successors, (644), 192 states have call predecessors, (644), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-11-23 15:08:49,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 11359 transitions. [2022-11-23 15:08:49,762 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 11359 transitions. Word has length 136 [2022-11-23 15:08:49,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:49,762 INFO L495 AbstractCegarLoop]: Abstraction has 7009 states and 11359 transitions. [2022-11-23 15:08:49,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 15:08:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 11359 transitions. [2022-11-23 15:08:49,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:08:49,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:49,777 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, 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] [2022-11-23 15:08:49,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:49,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:49,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:49,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash 277793415, now seen corresponding path program 1 times [2022-11-23 15:08:49,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:49,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997871265] [2022-11-23 15:08:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:49,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:08:50,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:50,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997871265] [2022-11-23 15:08:50,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997871265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206061730] [2022-11-23 15:08:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:50,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:50,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:50,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:50,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:08:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:50,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:50,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:08:50,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:50,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206061730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:50,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:50,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:08:50,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777648784] [2022-11-23 15:08:50,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:50,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:50,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:50,515 INFO L87 Difference]: Start difference. First operand 7009 states and 11359 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 15:08:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:51,412 INFO L93 Difference]: Finished difference Result 17638 states and 27780 transitions. [2022-11-23 15:08:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:51,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 136 [2022-11-23 15:08:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:51,482 INFO L225 Difference]: With dead ends: 17638 [2022-11-23 15:08:51,482 INFO L226 Difference]: Without dead ends: 12275 [2022-11-23 15:08:51,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 15:08:51,508 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3498 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3498 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:51,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3498 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:08:51,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12275 states. [2022-11-23 15:08:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12275 to 12241. [2022-11-23 15:08:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12241 states, 10603 states have (on average 1.5730453645194755) internal successors, (16679), 10637 states have internal predecessors, (16679), 1252 states have call successors, (1252), 384 states have call predecessors, (1252), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-11-23 15:08:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12241 states to 12241 states and 19183 transitions. [2022-11-23 15:08:52,194 INFO L78 Accepts]: Start accepts. Automaton has 12241 states and 19183 transitions. Word has length 136 [2022-11-23 15:08:52,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:52,195 INFO L495 AbstractCegarLoop]: Abstraction has 12241 states and 19183 transitions. [2022-11-23 15:08:52,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 15:08:52,195 INFO L276 IsEmpty]: Start isEmpty. Operand 12241 states and 19183 transitions. [2022-11-23 15:08:52,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:08:52,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:52,215 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, 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] [2022-11-23 15:08:52,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:52,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:52,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:52,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash -189913241, now seen corresponding path program 1 times [2022-11-23 15:08:52,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:52,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423318861] [2022-11-23 15:08:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:52,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:08:52,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:52,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423318861] [2022-11-23 15:08:52,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423318861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:52,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900669227] [2022-11-23 15:08:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:52,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:52,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:52,622 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:52,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:08:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:52,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:52,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 15:08:52,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:52,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900669227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:52,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:52,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:08:52,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469538017] [2022-11-23 15:08:52,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:52,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:52,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:52,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:52,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:52,988 INFO L87 Difference]: Start difference. First operand 12241 states and 19183 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 15:08:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:54,205 INFO L93 Difference]: Finished difference Result 33238 states and 51476 transitions. [2022-11-23 15:08:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 136 [2022-11-23 15:08:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:54,309 INFO L225 Difference]: With dead ends: 33238 [2022-11-23 15:08:54,309 INFO L226 Difference]: Without dead ends: 22643 [2022-11-23 15:08:54,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 15:08:54,351 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3501 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:54,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:08:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22643 states. [2022-11-23 15:08:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22643 to 22577. [2022-11-23 15:08:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22577 states, 19371 states have (on average 1.533374632182128) internal successors, (29703), 19437 states have internal predecessors, (29703), 2436 states have call successors, (2436), 768 states have call predecessors, (2436), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-11-23 15:08:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22577 states to 22577 states and 34575 transitions. [2022-11-23 15:08:55,825 INFO L78 Accepts]: Start accepts. Automaton has 22577 states and 34575 transitions. Word has length 136 [2022-11-23 15:08:55,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:55,825 INFO L495 AbstractCegarLoop]: Abstraction has 22577 states and 34575 transitions. [2022-11-23 15:08:55,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 15:08:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 22577 states and 34575 transitions. [2022-11-23 15:08:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:08:55,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:55,871 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, 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] [2022-11-23 15:08:55,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:56,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:56,079 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:56,079 INFO L85 PathProgramCache]: Analyzing trace with hash -764993913, now seen corresponding path program 1 times [2022-11-23 15:08:56,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:56,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373253567] [2022-11-23 15:08:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:56,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:08:56,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:56,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373253567] [2022-11-23 15:08:56,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373253567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:56,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343198453] [2022-11-23 15:08:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:56,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:56,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:56,312 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:56,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:08:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:56,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:08:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 15:08:56,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:08:56,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343198453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:08:56,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:08:56,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-23 15:08:56,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607914462] [2022-11-23 15:08:56,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:08:56,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:08:56,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:56,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:08:56,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:08:56,652 INFO L87 Difference]: Start difference. First operand 22577 states and 34575 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 15:08:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:59,327 INFO L93 Difference]: Finished difference Result 64054 states and 98068 transitions. [2022-11-23 15:08:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:08:59,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 136 [2022-11-23 15:08:59,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:59,558 INFO L225 Difference]: With dead ends: 64054 [2022-11-23 15:08:59,559 INFO L226 Difference]: Without dead ends: 43123 [2022-11-23 15:08:59,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 15:08:59,628 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3513 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:59,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:08:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43123 states. [2022-11-23 15:09:01,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43123 to 42993. [2022-11-23 15:09:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42993 states, 36715 states have (on average 1.5080212447228654) internal successors, (55367), 36845 states have internal predecessors, (55367), 4740 states have call successors, (4740), 1536 states have call predecessors, (4740), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-11-23 15:09:01,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42993 states to 42993 states and 64847 transitions. [2022-11-23 15:09:01,926 INFO L78 Accepts]: Start accepts. Automaton has 42993 states and 64847 transitions. Word has length 136 [2022-11-23 15:09:01,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:01,926 INFO L495 AbstractCegarLoop]: Abstraction has 42993 states and 64847 transitions. [2022-11-23 15:09:01,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 15:09:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 42993 states and 64847 transitions. [2022-11-23 15:09:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-23 15:09:01,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:01,994 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, 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] [2022-11-23 15:09:02,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:09:02,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3345630-0714-4d9f-bd58-557405b3b125/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:02,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:02,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:02,201 INFO L85 PathProgramCache]: Analyzing trace with hash 398878119, now seen corresponding path program 1 times [2022-11-23 15:09:02,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:02,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443448489] [2022-11-23 15:09:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:02,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-23 15:09:02,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:02,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443448489] [2022-11-23 15:09:02,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443448489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:02,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:09:02,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:09:02,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581104175] [2022-11-23 15:09:02,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:09:02,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:09:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:09:02,768 INFO L87 Difference]: Start difference. First operand 42993 states and 64847 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:09:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:08,386 INFO L93 Difference]: Finished difference Result 146421 states and 218578 transitions. [2022-11-23 15:09:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:09:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 136 [2022-11-23 15:09:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:08,894 INFO L225 Difference]: With dead ends: 146421 [2022-11-23 15:09:08,895 INFO L226 Difference]: Without dead ends: 105075 [2022-11-23 15:09:09,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:09:09,006 INFO L413 NwaCegarLoop]: 3312 mSDtfsCounter, 4333 mSDsluCounter, 9754 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4354 SdHoareTripleChecker+Valid, 13066 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:09,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4354 Valid, 13066 Invalid, 1371 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [141 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 15:09:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105075 states. [2022-11-23 15:09:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105075 to 82801. [2022-11-23 15:09:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82801 states, 70507 states have (on average 1.4914689321627639) internal successors, (105159), 70765 states have internal predecessors, (105159), 9220 states have call successors, (9220), 3072 states have call predecessors, (9220), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2022-11-23 15:09:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82801 states to 82801 states and 123599 transitions. [2022-11-23 15:09:14,317 INFO L78 Accepts]: Start accepts. Automaton has 82801 states and 123599 transitions. Word has length 136 [2022-11-23 15:09:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:14,319 INFO L495 AbstractCegarLoop]: Abstraction has 82801 states and 123599 transitions. [2022-11-23 15:09:14,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:09:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 82801 states and 123599 transitions. [2022-11-23 15:09:14,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-23 15:09:14,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:14,471 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, 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] [2022-11-23 15:09:14,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:09:14,472 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:14,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1068907572, now seen corresponding path program 1 times [2022-11-23 15:09:14,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:14,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137467512] [2022-11-23 15:09:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:14,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-23 15:09:15,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:15,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137467512] [2022-11-23 15:09:15,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137467512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:15,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:09:15,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:09:15,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485040706] [2022-11-23 15:09:15,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:15,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:09:15,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:15,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:09:15,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:09:15,671 INFO L87 Difference]: Start difference. First operand 82801 states and 123599 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-23 15:09:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:24,055 INFO L93 Difference]: Finished difference Result 222197 states and 331089 transitions. [2022-11-23 15:09:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:09:24,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2022-11-23 15:09:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:24,828 INFO L225 Difference]: With dead ends: 222197 [2022-11-23 15:09:24,829 INFO L226 Difference]: Without dead ends: 141043 [2022-11-23 15:09:25,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:09:25,060 INFO L413 NwaCegarLoop]: 3304 mSDtfsCounter, 4185 mSDsluCounter, 9846 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4191 SdHoareTripleChecker+Valid, 13150 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:25,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4191 Valid, 13150 Invalid, 1388 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [151 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 15:09:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141043 states.