./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash 08891daee860d4f5c8b9eb372c77be9c8f68c10ee67e3866dfab61bc12575d92 --- 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-5e519f3 [2022-11-03 02:02:20,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:02:20,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:02:20,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:02:20,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:02:20,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:02:20,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:02:20,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:02:20,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:02:20,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:02:20,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:02:20,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:02:20,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:02:20,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:02:20,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:02:20,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:02:20,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:02:20,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:02:20,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:02:20,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:02:20,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:02:20,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:02:20,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:02:20,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:02:20,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:02:20,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:02:20,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:02:20,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:02:20,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:02:20,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:02:20,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:02:20,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:02:20,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:02:20,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:02:20,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:02:20,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:02:20,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:02:20,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:02:20,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:02:20,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:02:20,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:02:20,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:02:20,613 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:02:20,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:02:20,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:02:20,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:02:20,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:02:20,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:02:20,617 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:02:20,617 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:02:20,618 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:02:20,618 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:02:20,619 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:02:20,620 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:02:20,620 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:02:20,620 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:02:20,621 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:02:20,621 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:02:20,621 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:02:20,622 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:02:20,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:02:20,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:02:20,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:02:20,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:02:20,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:02:20,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:02:20,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:02:20,625 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:02:20,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:02:20,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:02:20,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:02:20,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:20,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:02:20,627 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:02:20,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:02:20,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:02:20,628 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:02:20,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:02:20,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:02:20,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:02:20,629 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_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08891daee860d4f5c8b9eb372c77be9c8f68c10ee67e3866dfab61bc12575d92 [2022-11-03 02:02:20,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:02:21,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:02:21,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:02:21,031 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:02:21,032 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:02:21,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c [2022-11-03 02:02:21,113 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/data/25c580957/59b0764b08c64b9eb1364cac6e868aa4/FLAGa7e1ba82d [2022-11-03 02:02:21,705 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:02:21,706 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c [2022-11-03 02:02:21,718 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/data/25c580957/59b0764b08c64b9eb1364cac6e868aa4/FLAGa7e1ba82d [2022-11-03 02:02:22,018 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/data/25c580957/59b0764b08c64b9eb1364cac6e868aa4 [2022-11-03 02:02:22,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:02:22,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:02:22,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:22,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:02:22,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:02:22,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7084dd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22, skipping insertion in model container [2022-11-03 02:02:22,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:02:22,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:02:22,315 WARN L230 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_90c01714-9b27-44cb-8988-4bae3595339b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c[1107,1120] [2022-11-03 02:02:22,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:22,392 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:02:22,406 WARN L230 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_90c01714-9b27-44cb-8988-4bae3595339b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c[1107,1120] [2022-11-03 02:02:22,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:22,466 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:02:22,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22 WrapperNode [2022-11-03 02:02:22,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:22,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:02:22,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:02:22,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:02:22,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,547 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 234 [2022-11-03 02:02:22,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:02:22,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:02:22,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:02:22,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:02:22,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,604 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,607 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:02:22,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:02:22,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:02:22,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:02:22,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (1/1) ... [2022-11-03 02:02:22,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:22,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:22,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:02:22,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:02:22,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:02:22,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:02:22,906 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:02:22,908 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:02:23,504 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:02:23,821 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:02:23,822 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:02:23,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:02:23 BoogieIcfgContainer [2022-11-03 02:02:23,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:02:23,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:02:23,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:02:23,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:02:23,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:02:22" (1/3) ... [2022-11-03 02:02:23,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c30825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:02:23, skipping insertion in model container [2022-11-03 02:02:23,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:22" (2/3) ... [2022-11-03 02:02:23,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61c30825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:02:23, skipping insertion in model container [2022-11-03 02:02:23,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:02:23" (3/3) ... [2022-11-03 02:02:23,837 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.cal55.c [2022-11-03 02:02:23,866 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:02:23,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:02:23,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:02:23,945 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;@4668c5be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:02:23,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:02:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:02:23,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:23,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:02:23,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:23,969 INFO L85 PathProgramCache]: Analyzing trace with hash 4878902, now seen corresponding path program 1 times [2022-11-03 02:02:23,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:02:23,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685340238] [2022-11-03 02:02:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:23,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:02:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:02:24,666 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:02:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:02:24,934 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:02:24,937 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:02:24,939 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:02:24,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:02:24,948 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:02:24,953 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:02:24,976 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:02:24,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:02:24 BoogieIcfgContainer [2022-11-03 02:02:24,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:02:24,988 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:02:24,988 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:02:24,989 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:02:24,990 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:02:23" (3/4) ... [2022-11-03 02:02:24,994 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:02:24,994 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:02:24,996 INFO L158 Benchmark]: Toolchain (without parser) took 2972.68ms. Allocated memory is still 136.3MB. Free memory was 96.8MB in the beginning and 88.0MB in the end (delta: 8.7MB). Peak memory consumption was 11.5MB. Max. memory is 16.1GB. [2022-11-03 02:02:24,997 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 136.3MB. Free memory is still 114.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:02:24,998 INFO L158 Benchmark]: CACSL2BoogieTranslator took 442.51ms. Allocated memory is still 136.3MB. Free memory was 96.5MB in the beginning and 107.5MB in the end (delta: -11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-03 02:02:24,998 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.46ms. Allocated memory is still 136.3MB. Free memory was 107.5MB in the beginning and 103.9MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:02:24,999 INFO L158 Benchmark]: Boogie Preprocessor took 59.77ms. Allocated memory is still 136.3MB. Free memory was 103.9MB in the beginning and 101.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:02:25,000 INFO L158 Benchmark]: RCFGBuilder took 1210.22ms. Allocated memory is still 136.3MB. Free memory was 101.8MB in the beginning and 97.4MB in the end (delta: 4.3MB). Peak memory consumption was 57.2MB. Max. memory is 16.1GB. [2022-11-03 02:02:25,001 INFO L158 Benchmark]: TraceAbstraction took 1159.20ms. Allocated memory is still 136.3MB. Free memory was 96.7MB in the beginning and 89.2MB in the end (delta: 7.5MB). Peak memory consumption was 53.3MB. Max. memory is 16.1GB. [2022-11-03 02:02:25,002 INFO L158 Benchmark]: Witness Printer took 6.35ms. Allocated memory is still 136.3MB. Free memory was 89.0MB in the beginning and 88.0MB in the end (delta: 941.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:02:25,005 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 136.3MB. Free memory is still 114.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 442.51ms. Allocated memory is still 136.3MB. Free memory was 96.5MB in the beginning and 107.5MB in the end (delta: -11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.46ms. Allocated memory is still 136.3MB. Free memory was 107.5MB in the beginning and 103.9MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.77ms. Allocated memory is still 136.3MB. Free memory was 103.9MB in the beginning and 101.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1210.22ms. Allocated memory is still 136.3MB. Free memory was 101.8MB in the beginning and 97.4MB in the end (delta: 4.3MB). Peak memory consumption was 57.2MB. Max. memory is 16.1GB. * TraceAbstraction took 1159.20ms. Allocated memory is still 136.3MB. Free memory was 96.7MB in the beginning and 89.2MB in the end (delta: 7.5MB). Peak memory consumption was 53.3MB. Max. memory is 16.1GB. * Witness Printer took 6.35ms. Allocated memory is still 136.3MB. Free memory was 89.0MB in the beginning and 88.0MB in the end (delta: 941.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 93, overapproximation of bitwiseComplement at line 77, overapproximation of bitwiseAnd at line 65. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 3); [L29] const SORT_5 msb_SORT_5 = (SORT_5)1 << (3 - 1); [L31] const SORT_26 mask_SORT_26 = (SORT_26)-1 >> (sizeof(SORT_26) * 8 - 2); [L32] const SORT_26 msb_SORT_26 = (SORT_26)1 << (2 - 1); [L34] const SORT_1 var_11 = 0; [L35] const SORT_5 var_15 = 0; [L36] const SORT_5 var_21 = 5; [L37] const SORT_5 var_23 = 4; [L38] const SORT_1 var_39 = 1; [L40] SORT_1 input_2; [L41] SORT_1 input_3; [L42] SORT_1 input_4; [L43] SORT_5 input_6; [L44] SORT_5 input_7; [L45] SORT_1 input_8; [L46] SORT_5 input_9; [L47] SORT_5 input_10; [L49] SORT_1 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L50] SORT_5 state_16 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L51] SORT_1 state_18 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L52] SORT_5 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_5; [L54] SORT_1 init_13_arg_1 = var_11; [L55] state_12 = init_13_arg_1 [L56] SORT_5 init_17_arg_1 = var_15; [L57] state_16 = init_17_arg_1 [L58] SORT_1 init_19_arg_1 = var_11; [L59] state_18 = init_19_arg_1 [L60] SORT_5 init_30_arg_1 = var_15; [L61] state_29 = init_30_arg_1 VAL [init_13_arg_1=0, init_17_arg_1=0, init_19_arg_1=0, init_30_arg_1=0, mask_SORT_1=1, mask_SORT_26=3, mask_SORT_5=7, msb_SORT_1=1, msb_SORT_26=2, msb_SORT_5=4, state_12=0, state_16=0, state_18=0, state_29=0, var_11=0, var_15=0, var_21=5, var_23=4, var_39=1] [L64] input_2 = __VERIFIER_nondet_uchar() [L65] input_2 = input_2 & mask_SORT_1 [L66] input_3 = __VERIFIER_nondet_uchar() [L67] input_3 = input_3 & mask_SORT_1 [L68] input_4 = __VERIFIER_nondet_uchar() [L69] input_6 = __VERIFIER_nondet_uchar() [L70] input_7 = __VERIFIER_nondet_uchar() [L71] input_8 = __VERIFIER_nondet_uchar() [L72] input_9 = __VERIFIER_nondet_uchar() [L73] input_10 = __VERIFIER_nondet_uchar() [L76] SORT_1 var_14_arg_0 = state_12; [L77] SORT_1 var_14 = ~var_14_arg_0; [L78] SORT_1 var_20_arg_0 = state_18; [L79] SORT_5 var_20_arg_1 = state_16; [L80] SORT_5 var_20_arg_2 = input_7; [L81] EXPR var_20_arg_0 ? var_20_arg_1 : var_20_arg_2 [L81] SORT_5 var_20 = var_20_arg_0 ? var_20_arg_1 : var_20_arg_2; [L82] var_20 = var_20 & mask_SORT_5 [L83] SORT_5 var_24_arg_0 = var_20; [L84] SORT_5 var_24_arg_1 = var_23; [L85] SORT_1 var_24 = var_24_arg_0 == var_24_arg_1; [L86] SORT_1 var_25_arg_0 = var_24; [L87] SORT_1 var_25 = ~var_25_arg_0; [L88] SORT_5 var_22_arg_0 = var_20; [L89] SORT_5 var_22_arg_1 = var_21; [L90] SORT_1 var_22 = var_22_arg_0 == var_22_arg_1; [L91] SORT_1 var_27_arg_0 = var_25; [L92] SORT_1 var_27_arg_1 = var_22; [L93] SORT_26 var_27 = ((SORT_26)var_27_arg_0 << 1) | var_27_arg_1; [L94] var_27 = var_27 & mask_SORT_26 [L95] SORT_26 var_28_arg_0 = var_27; [L96] SORT_1 var_28 = var_28_arg_0 == mask_SORT_26; [L97] SORT_1 var_31_arg_0 = state_18; [L98] SORT_5 var_31_arg_1 = state_29; [L99] SORT_5 var_31_arg_2 = input_7; [L100] EXPR var_31_arg_0 ? var_31_arg_1 : var_31_arg_2 [L100] SORT_5 var_31 = var_31_arg_0 ? var_31_arg_1 : var_31_arg_2; [L101] var_31 = var_31 & mask_SORT_5 [L102] SORT_5 var_32_arg_0 = var_31; [L103] SORT_5 var_32_arg_1 = var_21; [L104] SORT_1 var_32 = var_32_arg_0 == var_32_arg_1; [L105] SORT_1 var_33_arg_0 = var_25; [L106] SORT_1 var_33_arg_1 = var_32; [L107] SORT_26 var_33 = ((SORT_26)var_33_arg_0 << 1) | var_33_arg_1; [L108] var_33 = var_33 & mask_SORT_26 [L109] SORT_26 var_34_arg_0 = var_33; [L110] SORT_1 var_34 = var_34_arg_0 == mask_SORT_26; [L111] SORT_1 var_35_arg_0 = var_28; [L112] SORT_1 var_35_arg_1 = var_34; [L113] SORT_1 var_35 = var_35_arg_0 == var_35_arg_1; [L114] SORT_1 var_36_arg_0 = var_14; [L115] SORT_1 var_36_arg_1 = var_35; [L116] SORT_1 var_36 = var_36_arg_0 | var_36_arg_1; [L117] SORT_1 var_40_arg_0 = var_36; [L118] SORT_1 var_40 = ~var_40_arg_0; [L119] SORT_1 var_41_arg_0 = var_39; [L120] SORT_1 var_41_arg_1 = var_40; [L121] SORT_1 var_41 = var_41_arg_0 & var_41_arg_1; [L122] var_41 = var_41 & mask_SORT_1 [L123] SORT_1 bad_42_arg_0 = var_41; [L124] CALL __VERIFIER_assert(!(bad_42_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:02:25,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI --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 64bit --witnessprinter.graph.data.programhash 08891daee860d4f5c8b9eb372c77be9c8f68c10ee67e3866dfab61bc12575d92 --- 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-5e519f3 [2022-11-03 02:02:27,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:02:28,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:02:28,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:02:28,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:02:28,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:02:28,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:02:28,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:02:28,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:02:28,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:02:28,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:02:28,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:02:28,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:02:28,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:02:28,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:02:28,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:02:28,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:02:28,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:02:28,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:02:28,112 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:02:28,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:02:28,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:02:28,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:02:28,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:02:28,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:02:28,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:02:28,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:02:28,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:02:28,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:02:28,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:02:28,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:02:28,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:02:28,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:02:28,146 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:02:28,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:02:28,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:02:28,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:02:28,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:02:28,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:02:28,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:02:28,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:02:28,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:02:28,230 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:02:28,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:02:28,232 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:02:28,232 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:02:28,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:02:28,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:02:28,234 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:02:28,235 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:02:28,235 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:02:28,235 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:02:28,237 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:02:28,237 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:02:28,239 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:02:28,239 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:02:28,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:02:28,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:02:28,240 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:02:28,240 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:02:28,241 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:02:28,241 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:02:28,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:02:28,241 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:02:28,242 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:02:28,242 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:02:28,242 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:02:28,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:02:28,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:28,243 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:02:28,243 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:02:28,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:02:28,244 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:02:28,244 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:28,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:02:28,245 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:02:28,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:02:28,246 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08891daee860d4f5c8b9eb372c77be9c8f68c10ee67e3866dfab61bc12575d92 [2022-11-03 02:02:28,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:02:28,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:02:28,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:02:28,797 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:02:28,799 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:02:28,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c [2022-11-03 02:02:28,878 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/data/45021313a/5bda3ac34a0544c7aba39b636e7aeac8/FLAGa85d1dc21 [2022-11-03 02:02:29,656 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:02:29,656 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c [2022-11-03 02:02:29,672 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/data/45021313a/5bda3ac34a0544c7aba39b636e7aeac8/FLAGa85d1dc21 [2022-11-03 02:02:29,925 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/data/45021313a/5bda3ac34a0544c7aba39b636e7aeac8 [2022-11-03 02:02:29,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:02:29,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:02:29,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:29,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:02:29,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:02:29,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@312e0142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:29, skipping insertion in model container [2022-11-03 02:02:29,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:02:29" (1/1) ... [2022-11-03 02:02:29,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:02:29,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:02:30,183 WARN L230 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_90c01714-9b27-44cb-8988-4bae3595339b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c[1107,1120] [2022-11-03 02:02:30,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:30,335 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:02:30,412 WARN L230 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_90c01714-9b27-44cb-8988-4bae3595339b/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.cal55.c[1107,1120] [2022-11-03 02:02:30,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:02:30,507 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:02:30,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30 WrapperNode [2022-11-03 02:02:30,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:02:30,510 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:02:30,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:02:30,510 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:02:30,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,586 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 234 [2022-11-03 02:02:30,586 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:02:30,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:02:30,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:02:30,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:02:30,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,620 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:02:30,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:02:30,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:02:30,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:02:30,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (1/1) ... [2022-11-03 02:02:30,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:02:30,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:30,666 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:02:30,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:02:30,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:02:30,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:02:30,871 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:02:30,874 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:02:31,421 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:02:31,431 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:02:31,431 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:02:31,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:02:31 BoogieIcfgContainer [2022-11-03 02:02:31,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:02:31,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:02:31,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:02:31,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:02:31,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:02:29" (1/3) ... [2022-11-03 02:02:31,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b135ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:02:31, skipping insertion in model container [2022-11-03 02:02:31,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:02:30" (2/3) ... [2022-11-03 02:02:31,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31b135ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:02:31, skipping insertion in model container [2022-11-03 02:02:31,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:02:31" (3/3) ... [2022-11-03 02:02:31,469 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.cal55.c [2022-11-03 02:02:31,494 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:02:31,494 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:02:31,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:02:31,609 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;@62514652, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:02:31,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:02:31,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:02:31,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:31,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:31,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:31,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:31,635 INFO L85 PathProgramCache]: Analyzing trace with hash -332259343, now seen corresponding path program 1 times [2022-11-03 02:02:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:31,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684315029] [2022-11-03 02:02:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:31,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:31,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:31,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:31,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:02:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:31,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:02:31,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:32,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:32,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:32,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684315029] [2022-11-03 02:02:32,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684315029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:32,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:32,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:32,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904152389] [2022-11-03 02:02:32,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:32,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:32,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:32,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:32,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:32,094 INFO L87 Difference]: Start difference. First operand has 39 states, 37 states have (on average 1.4864864864864864) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:32,179 INFO L93 Difference]: Finished difference Result 137 states and 203 transitions. [2022-11-03 02:02:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:02:32,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 02:02:32,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:32,194 INFO L225 Difference]: With dead ends: 137 [2022-11-03 02:02:32,194 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 02:02:32,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:32,203 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 134 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:32,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 179 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:32,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 02:02:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 37. [2022-11-03 02:02:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2022-11-03 02:02:32,265 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 9 [2022-11-03 02:02:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:32,265 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2022-11-03 02:02:32,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2022-11-03 02:02:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:02:32,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:32,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:32,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:02:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:32,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:32,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:32,483 INFO L85 PathProgramCache]: Analyzing trace with hash -275001041, now seen corresponding path program 1 times [2022-11-03 02:02:32,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:32,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737455835] [2022-11-03 02:02:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:32,485 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:32,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:32,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:32,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:02:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:32,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:02:32,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:32,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:32,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:32,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737455835] [2022-11-03 02:02:32,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737455835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:32,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:32,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:32,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017063824] [2022-11-03 02:02:32,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:32,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:32,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:32,669 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:32,725 INFO L93 Difference]: Finished difference Result 133 states and 187 transitions. [2022-11-03 02:02:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:02:32,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 02:02:32,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:32,728 INFO L225 Difference]: With dead ends: 133 [2022-11-03 02:02:32,728 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 02:02:32,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:32,731 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 128 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:32,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 178 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 02:02:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 39. [2022-11-03 02:02:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-11-03 02:02:32,742 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 9 [2022-11-03 02:02:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:32,743 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-11-03 02:02:32,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-11-03 02:02:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:02:32,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:32,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:32,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:32,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:32,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:32,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:32,961 INFO L85 PathProgramCache]: Analyzing trace with hash -274941459, now seen corresponding path program 1 times [2022-11-03 02:02:32,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:32,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051064411] [2022-11-03 02:02:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:32,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:32,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:32,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:32,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:02:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:33,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:02:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:33,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:33,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:33,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051064411] [2022-11-03 02:02:33,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051064411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:33,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:33,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:02:33,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111998062] [2022-11-03 02:02:33,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:33,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:33,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:33,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:33,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:33,335 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:33,443 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2022-11-03 02:02:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:33,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 02:02:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:33,445 INFO L225 Difference]: With dead ends: 73 [2022-11-03 02:02:33,446 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 02:02:33,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:02:33,448 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 124 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:33,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 180 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:33,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 02:02:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 41. [2022-11-03 02:02:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2022-11-03 02:02:33,455 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 9 [2022-11-03 02:02:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:33,456 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2022-11-03 02:02:33,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2022-11-03 02:02:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:02:33,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:33,462 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:33,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:33,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:33,664 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:33,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1250611463, now seen corresponding path program 1 times [2022-11-03 02:02:33,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:33,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186776242] [2022-11-03 02:02:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:33,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:33,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:33,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:33,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:02:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:33,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:02:33,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:33,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:33,949 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:33,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186776242] [2022-11-03 02:02:33,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186776242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:33,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:33,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:33,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87907760] [2022-11-03 02:02:33,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:33,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:33,953 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:34,001 INFO L93 Difference]: Finished difference Result 81 states and 112 transitions. [2022-11-03 02:02:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:02:34,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 02:02:34,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:34,003 INFO L225 Difference]: With dead ends: 81 [2022-11-03 02:02:34,003 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 02:02:34,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:34,005 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 79 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:34,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 75 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:34,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 02:02:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-11-03 02:02:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2022-11-03 02:02:34,012 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 40 [2022-11-03 02:02:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:34,013 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2022-11-03 02:02:34,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2022-11-03 02:02:34,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:02:34,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:34,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:34,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:34,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:34,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:34,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1110062853, now seen corresponding path program 1 times [2022-11-03 02:02:34,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:34,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121868026] [2022-11-03 02:02:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:34,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:34,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:34,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:34,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:02:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:34,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:02:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:34,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:34,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121868026] [2022-11-03 02:02:34,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121868026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:34,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:34,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:34,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329184469] [2022-11-03 02:02:34,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:34,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:34,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:34,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:34,457 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:34,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:34,489 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2022-11-03 02:02:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:02:34,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 02:02:34,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:34,491 INFO L225 Difference]: With dead ends: 85 [2022-11-03 02:02:34,491 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 02:02:34,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:34,492 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 73 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:34,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 82 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:34,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 02:02:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-11-03 02:02:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-11-03 02:02:34,499 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 40 [2022-11-03 02:02:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:34,499 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-11-03 02:02:34,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-11-03 02:02:34,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:02:34,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:34,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:34,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:34,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:34,723 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash -687361027, now seen corresponding path program 1 times [2022-11-03 02:02:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43725778] [2022-11-03 02:02:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:34,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:34,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:34,726 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:34,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:02:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:34,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:02:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:35,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:35,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:35,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43725778] [2022-11-03 02:02:35,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43725778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:35,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:35,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:02:35,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107925766] [2022-11-03 02:02:35,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:35,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:35,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:35,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:35,024 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:35,125 INFO L93 Difference]: Finished difference Result 120 states and 160 transitions. [2022-11-03 02:02:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:35,126 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 02:02:35,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:35,128 INFO L225 Difference]: With dead ends: 120 [2022-11-03 02:02:35,128 INFO L226 Difference]: Without dead ends: 87 [2022-11-03 02:02:35,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:02:35,137 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 108 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:35,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 182 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-03 02:02:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2022-11-03 02:02:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-03 02:02:35,154 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 40 [2022-11-03 02:02:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:35,154 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-03 02:02:35,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-03 02:02:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:02:35,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:35,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:35,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:35,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:35,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:35,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1001582715, now seen corresponding path program 1 times [2022-11-03 02:02:35,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:35,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35690936] [2022-11-03 02:02:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:35,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:35,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:35,382 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:35,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:02:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:02:35,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:35,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:35,621 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:35,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35690936] [2022-11-03 02:02:35,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35690936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:35,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:02:35,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:02:35,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555605672] [2022-11-03 02:02:35,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:35,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:02:35,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:35,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:02:35,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:02:35,625 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:35,676 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2022-11-03 02:02:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:02:35,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 02:02:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:35,677 INFO L225 Difference]: With dead ends: 95 [2022-11-03 02:02:35,678 INFO L226 Difference]: Without dead ends: 62 [2022-11-03 02:02:35,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:02:35,679 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 61 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:35,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 103 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-03 02:02:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-11-03 02:02:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-11-03 02:02:35,686 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 40 [2022-11-03 02:02:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:35,700 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-11-03 02:02:35,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-11-03 02:02:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:02:35,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:35,702 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:02:35,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:35,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:35,903 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:35,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:35,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1702647293, now seen corresponding path program 1 times [2022-11-03 02:02:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:35,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989502105] [2022-11-03 02:02:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:35,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:35,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:35,906 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:35,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:02:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:36,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:02:36,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:36,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:36,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:36,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989502105] [2022-11-03 02:02:36,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989502105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:36,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2041341047] [2022-11-03 02:02:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:36,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:36,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:36,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:36,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 02:02:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:36,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:02:36,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:36,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:37,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2041341047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:37,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363087021] [2022-11-03 02:02:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:37,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:37,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:37,036 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:37,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:02:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:37,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:02:37,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:37,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:37,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363087021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:37,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:37,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-03 02:02:37,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488781286] [2022-11-03 02:02:37,439 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:37,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:02:37,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:37,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:02:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:02:37,441 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:37,957 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2022-11-03 02:02:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:02:37,957 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 02:02:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:37,958 INFO L225 Difference]: With dead ends: 188 [2022-11-03 02:02:37,959 INFO L226 Difference]: Without dead ends: 155 [2022-11-03 02:02:37,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:02:37,960 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 438 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:37,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 366 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:02:37,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-03 02:02:37,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 68. [2022-11-03 02:02:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 67 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-11-03 02:02:37,970 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 40 [2022-11-03 02:02:37,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:37,971 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-11-03 02:02:37,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-11-03 02:02:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:02:37,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:37,973 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:02:38,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:38,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:38,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:38,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:38,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:38,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:38,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1759905595, now seen corresponding path program 1 times [2022-11-03 02:02:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:38,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101386425] [2022-11-03 02:02:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:38,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:38,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:38,589 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:38,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:02:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:38,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:02:38,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:38,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:39,104 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101386425] [2022-11-03 02:02:39,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101386425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:39,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [832963937] [2022-11-03 02:02:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:39,105 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:39,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:39,107 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:39,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 02:02:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:39,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:39,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:02:39,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:39,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [832963937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:39,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:39,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2022-11-03 02:02:39,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283528343] [2022-11-03 02:02:39,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:39,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:39,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:39,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:39,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:02:39,385 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:39,479 INFO L93 Difference]: Finished difference Result 202 states and 264 transitions. [2022-11-03 02:02:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:02:39,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 02:02:39,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:39,481 INFO L225 Difference]: With dead ends: 202 [2022-11-03 02:02:39,481 INFO L226 Difference]: Without dead ends: 156 [2022-11-03 02:02:39,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:02:39,483 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 204 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:39,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 159 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:39,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-03 02:02:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 70. [2022-11-03 02:02:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.289855072463768) internal successors, (89), 69 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2022-11-03 02:02:39,492 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 40 [2022-11-03 02:02:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:39,493 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2022-11-03 02:02:39,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:39,493 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2022-11-03 02:02:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:02:39,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:39,495 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:02:39,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:39,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:39,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:39,904 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1759965177, now seen corresponding path program 1 times [2022-11-03 02:02:39,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:39,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505196269] [2022-11-03 02:02:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:39,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:39,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:39,907 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:39,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:02:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:40,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:02:40,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:02:41,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:02:45,633 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:45,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505196269] [2022-11-03 02:02:45,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505196269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:45,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945059046] [2022-11-03 02:02:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:45,634 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:45,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:45,635 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:45,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-03 02:02:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:45,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:02:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:47,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:02:48,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1945059046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:48,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383085944] [2022-11-03 02:02:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:48,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:02:48,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:02:48,821 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:02:48,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:02:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:48,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-03 02:02:48,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:02:50,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:02:51,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383085944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:51,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:02:51,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 12, 8, 9, 9] total 20 [2022-11-03 02:02:51,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260231891] [2022-11-03 02:02:51,640 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:02:51,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:02:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:02:51,643 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:53,077 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-11-03 02:02:53,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:02:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-03 02:02:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:53,080 INFO L225 Difference]: With dead ends: 74 [2022-11-03 02:02:53,080 INFO L226 Difference]: Without dead ends: 72 [2022-11-03 02:02:53,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 215 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:02:53,082 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 274 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:53,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 247 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-11-03 02:02:53,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-03 02:02:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-03 02:02:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 71 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-11-03 02:02:53,091 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 40 [2022-11-03 02:02:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:53,091 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-11-03 02:02:53,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-11-03 02:02:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:02:53,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:53,093 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:02:53,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:53,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:53,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:53,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:53,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1845699059, now seen corresponding path program 1 times [2022-11-03 02:02:53,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:53,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120171661] [2022-11-03 02:02:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:53,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:53,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:53,712 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:53,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:02:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:02:53,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:54,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:54,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:54,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120171661] [2022-11-03 02:02:54,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120171661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591066439] [2022-11-03 02:02:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:54,312 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:54,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:54,315 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:54,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-03 02:02:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:54,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:54,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:54,661 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:02:54,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:54,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591066439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:54,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:54,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:02:54,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152995935] [2022-11-03 02:02:54,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:54,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:54,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:54,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:54,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:02:54,665 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:54,777 INFO L93 Difference]: Finished difference Result 168 states and 211 transitions. [2022-11-03 02:02:54,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:54,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:02:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:54,783 INFO L225 Difference]: With dead ends: 168 [2022-11-03 02:02:54,784 INFO L226 Difference]: Without dead ends: 118 [2022-11-03 02:02:54,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:02:54,785 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 163 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:54,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 191 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:02:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-03 02:02:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 72. [2022-11-03 02:02:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 71 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-11-03 02:02:54,797 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 71 [2022-11-03 02:02:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:54,799 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-11-03 02:02:54,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-11-03 02:02:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:02:54,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:54,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:02:54,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:55,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:55,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:02:55,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:55,214 INFO L85 PathProgramCache]: Analyzing trace with hash 40260725, now seen corresponding path program 1 times [2022-11-03 02:02:55,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:55,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81753054] [2022-11-03 02:02:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:55,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:55,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:55,216 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:55,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:02:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:55,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:02:55,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:55,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:02:55,890 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:02:55,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81753054] [2022-11-03 02:02:55,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81753054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:55,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [533616977] [2022-11-03 02:02:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:55,891 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:55,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:02:55,893 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:02:55,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-03 02:02:56,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:56,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:02:56,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:02:56,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:02:56,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [533616977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:02:56,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:02:56,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 11 [2022-11-03 02:02:56,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660269299] [2022-11-03 02:02:56,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:02:56,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:02:56,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:02:56,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:02:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:02:56,261 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:56,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:56,393 INFO L93 Difference]: Finished difference Result 200 states and 252 transitions. [2022-11-03 02:02:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:02:56,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:02:56,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:56,396 INFO L225 Difference]: With dead ends: 200 [2022-11-03 02:02:56,396 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:02:56,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:02:56,401 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 90 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:56,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 273 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:02:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:02:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 86. [2022-11-03 02:02:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2588235294117647) internal successors, (107), 85 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2022-11-03 02:02:56,412 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 71 [2022-11-03 02:02:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:02:56,413 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2022-11-03 02:02:56,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2022-11-03 02:02:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:02:56,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:02:56,415 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:02:56,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:56,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:02:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:02:56,831 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:02:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:02:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash 720319095, now seen corresponding path program 1 times [2022-11-03 02:02:56,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:02:56,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083594673] [2022-11-03 02:02:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:02:56,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:02:56,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:02:56,833 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:02:56,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:02:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:02:57,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:02:57,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:02:58,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:03:15,845 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:03:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083594673] [2022-11-03 02:03:15,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083594673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1691970368] [2022-11-03 02:03:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:15,846 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:03:15,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:03:15,851 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:03:15,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-03 02:03:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:16,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 02:03:16,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:03:17,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:03:21,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1691970368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:21,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365949244] [2022-11-03 02:03:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:21,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:21,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:21,395 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:21,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:03:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:21,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-03 02:03:21,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:03:26,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 02:03:47,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365949244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:47,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:03:47,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 27, 27] total 98 [2022-11-03 02:03:47,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729415549] [2022-11-03 02:03:47,101 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:47,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-03 02:03:47,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:03:47,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-03 02:03:47,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=8935, Unknown=0, NotChecked=0, Total=9506 [2022-11-03 02:03:47,107 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 98 states, 98 states have (on average 2.5408163265306123) internal successors, (249), 98 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:15,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:15,750 INFO L93 Difference]: Finished difference Result 749 states and 921 transitions. [2022-11-03 02:04:15,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-03 02:04:15,750 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.5408163265306123) internal successors, (249), 98 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:04:15,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:15,753 INFO L225 Difference]: With dead ends: 749 [2022-11-03 02:04:15,753 INFO L226 Difference]: Without dead ends: 747 [2022-11-03 02:04:15,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 332 SyntacticMatches, 11 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11122 ImplicationChecksByTransitivity, 61.1s TimeCoverageRelationStatistics Valid=7225, Invalid=35831, Unknown=0, NotChecked=0, Total=43056 [2022-11-03 02:04:15,763 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 2275 mSDsluCounter, 4749 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2275 SdHoareTripleChecker+Valid, 4854 SdHoareTripleChecker+Invalid, 9444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7145 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:15,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2275 Valid, 4854 Invalid, 9444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2127 Invalid, 0 Unknown, 7145 Unchecked, 2.6s Time] [2022-11-03 02:04:15,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-11-03 02:04:15,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 111. [2022-11-03 02:04:15,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2727272727272727) internal successors, (140), 110 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-11-03 02:04:15,779 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 71 [2022-11-03 02:04:15,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:15,779 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-11-03 02:04:15,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.5408163265306123) internal successors, (249), 98 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:15,780 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-11-03 02:04:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:04:15,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:15,781 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-11-03 02:04:15,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:16,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:16,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-03 02:04:16,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:16,407 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:16,407 INFO L85 PathProgramCache]: Analyzing trace with hash 720378677, now seen corresponding path program 1 times [2022-11-03 02:04:16,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:16,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930622264] [2022-11-03 02:04:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:16,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:16,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:16,409 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:16,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:04:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:16,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:04:16,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:04:16,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:04:17,099 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:17,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930622264] [2022-11-03 02:04:17,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930622264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:17,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [767883462] [2022-11-03 02:04:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:17,100 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:17,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:17,107 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:17,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-03 02:04:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:17,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:04:17,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:04:17,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:04:17,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [767883462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:04:17,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:04:17,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 10] total 19 [2022-11-03 02:04:17,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053313192] [2022-11-03 02:04:17,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:17,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:17,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:04:17,385 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:17,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:17,511 INFO L93 Difference]: Finished difference Result 282 states and 359 transitions. [2022-11-03 02:04:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:04:17,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:04:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:17,513 INFO L225 Difference]: With dead ends: 282 [2022-11-03 02:04:17,514 INFO L226 Difference]: Without dead ends: 193 [2022-11-03 02:04:17,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:04:17,521 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 123 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:17,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 155 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:04:17,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-03 02:04:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 111. [2022-11-03 02:04:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2545454545454546) internal successors, (138), 110 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2022-11-03 02:04:17,539 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 71 [2022-11-03 02:04:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:17,540 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2022-11-03 02:04:17,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2022-11-03 02:04:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:04:17,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:17,542 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:04:17,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:17,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:17,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:17,945 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:17,945 INFO L85 PathProgramCache]: Analyzing trace with hash 133513081, now seen corresponding path program 1 times [2022-11-03 02:04:17,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:17,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963382979] [2022-11-03 02:04:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:17,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:17,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:17,950 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:17,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:04:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:18,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:04:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:18,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:04:18,337 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:18,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963382979] [2022-11-03 02:04:18,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963382979] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:18,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:18,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-03 02:04:18,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938773125] [2022-11-03 02:04:18,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:18,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:18,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:04:18,339 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:18,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:18,407 INFO L93 Difference]: Finished difference Result 357 states and 446 transitions. [2022-11-03 02:04:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:04:18,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:04:18,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:18,409 INFO L225 Difference]: With dead ends: 357 [2022-11-03 02:04:18,409 INFO L226 Difference]: Without dead ends: 268 [2022-11-03 02:04:18,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:04:18,411 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 136 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:18,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 177 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:04:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-03 02:04:18,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 149. [2022-11-03 02:04:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.2432432432432432) internal successors, (184), 148 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 184 transitions. [2022-11-03 02:04:18,425 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 184 transitions. Word has length 71 [2022-11-03 02:04:18,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:18,425 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 184 transitions. [2022-11-03 02:04:18,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:18,426 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 184 transitions. [2022-11-03 02:04:18,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:04:18,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:18,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:04:18,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:18,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:18,635 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash -559544583, now seen corresponding path program 1 times [2022-11-03 02:04:18,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:18,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284765137] [2022-11-03 02:04:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:18,636 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:18,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:18,637 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:18,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:04:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:18,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:04:18,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:18,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:04:19,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:19,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284765137] [2022-11-03 02:04:19,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284765137] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:19,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:19,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-03 02:04:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888535417] [2022-11-03 02:04:19,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:19,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:19,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:19,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:04:19,007 INFO L87 Difference]: Start difference. First operand 149 states and 184 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:19,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:19,078 INFO L93 Difference]: Finished difference Result 480 states and 593 transitions. [2022-11-03 02:04:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:04:19,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:04:19,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:19,081 INFO L225 Difference]: With dead ends: 480 [2022-11-03 02:04:19,081 INFO L226 Difference]: Without dead ends: 361 [2022-11-03 02:04:19,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:04:19,083 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 151 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:19,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 171 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:04:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-03 02:04:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 203. [2022-11-03 02:04:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.2227722772277227) internal successors, (247), 202 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 247 transitions. [2022-11-03 02:04:19,096 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 247 transitions. Word has length 71 [2022-11-03 02:04:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:19,097 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 247 transitions. [2022-11-03 02:04:19,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 247 transitions. [2022-11-03 02:04:19,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:04:19,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:19,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:04:19,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:19,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:19,299 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:19,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1651420167, now seen corresponding path program 1 times [2022-11-03 02:04:19,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:19,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703819892] [2022-11-03 02:04:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:19,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:19,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:19,304 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:19,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:04:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:19,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:04:19,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:19,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:04:19,669 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:19,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703819892] [2022-11-03 02:04:19,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703819892] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:19,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:19,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 02:04:19,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883252807] [2022-11-03 02:04:19,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:19,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:19,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:19,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:19,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:04:19,672 INFO L87 Difference]: Start difference. First operand 203 states and 247 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:19,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:19,739 INFO L93 Difference]: Finished difference Result 497 states and 609 transitions. [2022-11-03 02:04:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:04:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:04:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:19,741 INFO L225 Difference]: With dead ends: 497 [2022-11-03 02:04:19,741 INFO L226 Difference]: Without dead ends: 342 [2022-11-03 02:04:19,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:04:19,742 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 81 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:19,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 237 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:04:19,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-03 02:04:19,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 203. [2022-11-03 02:04:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.2079207920792079) internal successors, (244), 202 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 244 transitions. [2022-11-03 02:04:19,757 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 244 transitions. Word has length 71 [2022-11-03 02:04:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:19,757 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 244 transitions. [2022-11-03 02:04:19,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 244 transitions. [2022-11-03 02:04:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:04:19,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:19,759 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:04:19,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:19,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:19,973 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:19,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2056741115, now seen corresponding path program 1 times [2022-11-03 02:04:19,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:19,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614134981] [2022-11-03 02:04:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:19,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:19,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:19,977 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:19,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:04:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:20,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 02:04:20,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:23,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:36,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:36,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614134981] [2022-11-03 02:04:36,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614134981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:36,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1530720658] [2022-11-03 02:04:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:36,198 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:04:36,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:04:36,199 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:04:36,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-03 02:04:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:36,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:04:36,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:04:38,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:42,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1530720658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:42,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564442740] [2022-11-03 02:04:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:42,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:42,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:42,871 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:42,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-03 02:04:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:42,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-03 02:04:43,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:44,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:49,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564442740] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:49,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:04:49,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 31, 27, 28, 28] total 58 [2022-11-03 02:04:49,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920385721] [2022-11-03 02:04:49,112 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:49,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-03 02:04:49,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:49,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-03 02:04:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3036, Unknown=0, NotChecked=0, Total=3306 [2022-11-03 02:04:49,115 INFO L87 Difference]: Start difference. First operand 203 states and 244 transitions. Second operand has 58 states, 58 states have (on average 2.810344827586207) internal successors, (163), 58 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:52,672 INFO L93 Difference]: Finished difference Result 440 states and 529 transitions. [2022-11-03 02:04:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 02:04:52,673 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.810344827586207) internal successors, (163), 58 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:04:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:52,677 INFO L225 Difference]: With dead ends: 440 [2022-11-03 02:04:52,677 INFO L226 Difference]: Without dead ends: 438 [2022-11-03 02:04:52,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 363 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=492, Invalid=5988, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 02:04:52,679 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 117 mSDsluCounter, 1881 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:52,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1926 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 654 Unchecked, 0.2s Time] [2022-11-03 02:04:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-03 02:04:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 366. [2022-11-03 02:04:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.2191780821917808) internal successors, (445), 365 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 445 transitions. [2022-11-03 02:04:52,708 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 445 transitions. Word has length 71 [2022-11-03 02:04:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:52,709 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 445 transitions. [2022-11-03 02:04:52,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.810344827586207) internal successors, (163), 58 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 445 transitions. [2022-11-03 02:04:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:04:52,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:52,710 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:04:52,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:52,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:53,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:53,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:53,323 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:53,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2106522489, now seen corresponding path program 1 times [2022-11-03 02:04:53,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:53,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907549825] [2022-11-03 02:04:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:53,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:53,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:53,325 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:53,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:04:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:53,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:04:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:04:53,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:04:53,679 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:04:53,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907549825] [2022-11-03 02:04:53,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907549825] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:53,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:04:53,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-11-03 02:04:53,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827136594] [2022-11-03 02:04:53,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:04:53,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:04:53,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:04:53,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:04:53,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:04:53,686 INFO L87 Difference]: Start difference. First operand 366 states and 445 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:53,790 INFO L93 Difference]: Finished difference Result 950 states and 1156 transitions. [2022-11-03 02:04:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:04:53,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:04:53,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:53,794 INFO L225 Difference]: With dead ends: 950 [2022-11-03 02:04:53,794 INFO L226 Difference]: Without dead ends: 632 [2022-11-03 02:04:53,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:04:53,796 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 86 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:53,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 257 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:04:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-03 02:04:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 366. [2022-11-03 02:04:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.1863013698630136) internal successors, (433), 365 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 433 transitions. [2022-11-03 02:04:53,824 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 433 transitions. Word has length 71 [2022-11-03 02:04:53,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:53,825 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 433 transitions. [2022-11-03 02:04:53,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:53,825 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 433 transitions. [2022-11-03 02:04:53,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:04:53,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:53,827 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:04:53,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:54,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:04:54,039 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:04:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:54,040 INFO L85 PathProgramCache]: Analyzing trace with hash 826658811, now seen corresponding path program 1 times [2022-11-03 02:04:54,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:04:54,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382023597] [2022-11-03 02:04:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:54,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:04:54,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:04:54,043 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:04:54,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:04:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:54,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-03 02:04:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:04:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:04:57,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:11,525 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:05:11,525 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:11,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382023597] [2022-11-03 02:05:11,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382023597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:11,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1019293762] [2022-11-03 02:05:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:11,526 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:11,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:11,527 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:11,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 02:05:11,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:11,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-03 02:05:11,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:13,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:05:17,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1019293762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:17,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468621900] [2022-11-03 02:05:17,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:17,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:17,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:17,621 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:17,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 02:05:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:17,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-03 02:05:17,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:05:19,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:05:23,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468621900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:23,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:05:23,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 34, 30, 31, 31] total 64 [2022-11-03 02:05:23,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093248] [2022-11-03 02:05:23,418 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:05:23,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-03 02:05:23,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-03 02:05:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3732, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:05:23,420 INFO L87 Difference]: Start difference. First operand 366 states and 433 transitions. Second operand has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:32,224 INFO L93 Difference]: Finished difference Result 824 states and 956 transitions. [2022-11-03 02:05:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:05:32,225 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:05:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:32,228 INFO L225 Difference]: With dead ends: 824 [2022-11-03 02:05:32,229 INFO L226 Difference]: Without dead ends: 822 [2022-11-03 02:05:32,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 357 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=1238, Invalid=8662, Unknown=0, NotChecked=0, Total=9900 [2022-11-03 02:05:32,231 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 653 mSDsluCounter, 2010 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1989 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:32,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 2067 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 305 Invalid, 0 Unknown, 1989 Unchecked, 0.4s Time] [2022-11-03 02:05:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-11-03 02:05:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 402. [2022-11-03 02:05:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.199501246882793) internal successors, (481), 401 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:32,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 481 transitions. [2022-11-03 02:05:32,263 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 481 transitions. Word has length 71 [2022-11-03 02:05:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:32,264 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 481 transitions. [2022-11-03 02:05:32,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.359375) internal successors, (151), 64 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:32,264 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 481 transitions. [2022-11-03 02:05:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:05:32,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:32,266 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:05:32,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:32,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:32,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:32,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:32,883 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:32,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:32,883 INFO L85 PathProgramCache]: Analyzing trace with hash -761689091, now seen corresponding path program 1 times [2022-11-03 02:05:32,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:32,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336686941] [2022-11-03 02:05:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:32,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:32,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:32,886 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:32,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:05:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:33,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:05:33,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:05:33,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:05:33,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:33,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336686941] [2022-11-03 02:05:33,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336686941] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:33,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:33,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 02:05:33,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383770417] [2022-11-03 02:05:33,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:33,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:05:33,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:05:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:33,260 INFO L87 Difference]: Start difference. First operand 402 states and 481 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:33,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:33,384 INFO L93 Difference]: Finished difference Result 1490 states and 1749 transitions. [2022-11-03 02:05:33,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:05:33,385 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:05:33,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:33,389 INFO L225 Difference]: With dead ends: 1490 [2022-11-03 02:05:33,389 INFO L226 Difference]: Without dead ends: 1136 [2022-11-03 02:05:33,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:05:33,391 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 186 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:33,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 182 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:05:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-11-03 02:05:33,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 570. [2022-11-03 02:05:33,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.1757469244288226) internal successors, (669), 569 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 669 transitions. [2022-11-03 02:05:33,425 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 669 transitions. Word has length 71 [2022-11-03 02:05:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:33,425 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 669 transitions. [2022-11-03 02:05:33,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 669 transitions. [2022-11-03 02:05:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:05:33,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:33,428 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:05:33,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:33,638 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1528258685, now seen corresponding path program 1 times [2022-11-03 02:05:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:33,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323263111] [2022-11-03 02:05:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:33,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:33,641 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:33,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-03 02:05:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:33,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:05:33,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:05:33,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:05:33,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323263111] [2022-11-03 02:05:33,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323263111] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:33,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:33,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-03 02:05:33,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949479545] [2022-11-03 02:05:33,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:33,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:05:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:05:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:05:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:33,955 INFO L87 Difference]: Start difference. First operand 570 states and 669 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:34,032 INFO L93 Difference]: Finished difference Result 1467 states and 1708 transitions. [2022-11-03 02:05:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:05:34,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:05:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:34,037 INFO L225 Difference]: With dead ends: 1467 [2022-11-03 02:05:34,037 INFO L226 Difference]: Without dead ends: 983 [2022-11-03 02:05:34,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:05:34,039 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 112 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:34,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 250 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:05:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-11-03 02:05:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 570. [2022-11-03 02:05:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 1.133567662565905) internal successors, (645), 569 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 645 transitions. [2022-11-03 02:05:34,078 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 645 transitions. Word has length 71 [2022-11-03 02:05:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:34,078 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 645 transitions. [2022-11-03 02:05:34,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:05:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 645 transitions. [2022-11-03 02:05:34,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:05:34,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:34,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-03 02:05:34,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:34,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:05:34,294 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash -60089217, now seen corresponding path program 1 times [2022-11-03 02:05:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:05:34,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417138036] [2022-11-03 02:05:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:34,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:05:34,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:05:34,297 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:05:34,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:05:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:34,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 02:05:34,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:05:38,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:05:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:05:57,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:05:57,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417138036] [2022-11-03 02:05:57,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417138036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:05:57,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1358875136] [2022-11-03 02:05:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:57,018 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:05:57,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:05:57,027 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:05:57,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:05:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:57,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-03 02:05:57,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:05:59,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:04,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1358875136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:04,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195531045] [2022-11-03 02:06:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:04,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:04,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:04,548 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:04,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-03 02:06:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:04,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 02:06:04,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:06,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:11,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195531045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:11,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:06:11,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 39, 35, 36, 36] total 74 [2022-11-03 02:06:11,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577005398] [2022-11-03 02:06:11,513 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:11,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-03 02:06:11,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:06:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-03 02:06:11,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=5052, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 02:06:11,515 INFO L87 Difference]: Start difference. First operand 570 states and 645 transitions. Second operand has 74 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 74 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:22,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:22,751 INFO L93 Difference]: Finished difference Result 1522 states and 1704 transitions. [2022-11-03 02:06:22,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-03 02:06:22,751 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 74 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 02:06:22,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:22,755 INFO L225 Difference]: With dead ends: 1522 [2022-11-03 02:06:22,755 INFO L226 Difference]: Without dead ends: 1520 [2022-11-03 02:06:22,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 344 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3093 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=948, Invalid=13572, Unknown=0, NotChecked=0, Total=14520 [2022-11-03 02:06:22,758 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 306 mSDsluCounter, 6414 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 6557 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1468 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:22,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 6557 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 1468 Unchecked, 0.2s Time] [2022-11-03 02:06:22,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-11-03 02:06:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1274. [2022-11-03 02:06:22,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1273 states have (on average 1.1288295365278869) internal successors, (1437), 1273 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1437 transitions. [2022-11-03 02:06:22,843 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1437 transitions. Word has length 71 [2022-11-03 02:06:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:22,843 INFO L495 AbstractCegarLoop]: Abstraction has 1274 states and 1437 transitions. [2022-11-03 02:06:22,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2027027027027026) internal successors, (163), 74 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1437 transitions. [2022-11-03 02:06:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:06:22,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:22,847 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:22,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:23,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:23,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:23,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:06:23,459 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:23,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:23,459 INFO L85 PathProgramCache]: Analyzing trace with hash -272216387, now seen corresponding path program 2 times [2022-11-03 02:06:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:06:23,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174085403] [2022-11-03 02:06:23,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:06:23,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:06:23,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:06:23,461 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:06:23,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-03 02:06:23,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:06:23,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:23,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-03 02:06:23,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:06:26,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:04,130 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 88 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:07:04,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:07:04,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174085403] [2022-11-03 02:07:04,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174085403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:04,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2078183171] [2022-11-03 02:07:04,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:07:04,131 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:07:04,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:07:04,132 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:07:04,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-03 02:07:04,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:07:04,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:07:04,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 02:07:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:07:05,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 88 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:07:12,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2078183171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:12,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976683430] [2022-11-03 02:07:12,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:07:12,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:12,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:12,401 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:12,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-03 02:07:12,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:07:12,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:07:12,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:07:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 80 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:07:21,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 22 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:07:59,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976683430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:59,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:07:59,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 45, 37, 45, 37, 37] total 148 [2022-11-03 02:07:59,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210624216] [2022-11-03 02:07:59,255 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:59,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-11-03 02:07:59,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:07:59,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-11-03 02:07:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=21032, Unknown=0, NotChecked=0, Total=21756 [2022-11-03 02:07:59,260 INFO L87 Difference]: Start difference. First operand 1274 states and 1437 transitions. Second operand has 148 states, 148 states have (on average 2.3445945945945947) internal successors, (347), 148 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:38,909 INFO L93 Difference]: Finished difference Result 4231 states and 4722 transitions. [2022-11-03 02:08:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-11-03 02:08:38,911 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.3445945945945947) internal successors, (347), 148 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-03 02:08:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:38,920 INFO L225 Difference]: With dead ends: 4231 [2022-11-03 02:08:38,921 INFO L226 Difference]: Without dead ends: 4229 [2022-11-03 02:08:38,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 464 SyntacticMatches, 4 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18414 ImplicationChecksByTransitivity, 108.9s TimeCoverageRelationStatistics Valid=7354, Invalid=62078, Unknown=0, NotChecked=0, Total=69432 [2022-11-03 02:08:38,928 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 2183 mSDsluCounter, 7662 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2183 SdHoareTripleChecker+Valid, 7785 SdHoareTripleChecker+Invalid, 6581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4115 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:38,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2183 Valid, 7785 Invalid, 6581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 2231 Invalid, 0 Unknown, 4115 Unchecked, 2.7s Time] [2022-11-03 02:08:38,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2022-11-03 02:08:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 1483. [2022-11-03 02:08:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 1.1437246963562753) internal successors, (1695), 1482 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 1695 transitions. [2022-11-03 02:08:39,080 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 1695 transitions. Word has length 102 [2022-11-03 02:08:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:39,081 INFO L495 AbstractCegarLoop]: Abstraction has 1483 states and 1695 transitions. [2022-11-03 02:08:39,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.3445945945945947) internal successors, (347), 148 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:08:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 1695 transitions. [2022-11-03 02:08:39,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:08:39,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:39,085 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:39,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:39,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:39,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-03 02:08:39,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:08:39,691 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:08:39,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1905920577, now seen corresponding path program 2 times [2022-11-03 02:08:39,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:08:39,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26250733] [2022-11-03 02:08:39,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:08:39,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:08:39,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:08:39,694 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:08:39,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:08:39,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:08:39,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:08:39,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-03 02:08:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 78 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:08:42,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:30,691 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 88 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:09:30,692 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:09:30,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26250733] [2022-11-03 02:09:30,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26250733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:30,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [330195359] [2022-11-03 02:09:30,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:09:30,692 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:09:30,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:09:30,694 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:09:30,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 02:09:31,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:09:31,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:09:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-03 02:09:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 78 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:09:32,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:09:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 88 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:09:39,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [330195359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:09:39,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896286864] [2022-11-03 02:09:39,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:09:39,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:09:39,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:39,090 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:09:39,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-03 02:09:39,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:09:39,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:09:39,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-03 02:09:39,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:09:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 78 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:09:51,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:10:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 72 proven. 20 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:10:37,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896286864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:10:37,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:10:37,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 53, 43, 53, 43, 43] total 174 [2022-11-03 02:10:37,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14277573] [2022-11-03 02:10:37,901 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:10:37,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-11-03 02:10:37,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:10:37,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-11-03 02:10:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=29256, Unknown=0, NotChecked=0, Total=30102 [2022-11-03 02:10:37,906 INFO L87 Difference]: Start difference. First operand 1483 states and 1695 transitions. Second operand has 174 states, 174 states have (on average 1.9597701149425288) internal successors, (341), 174 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:01,043 INFO L93 Difference]: Finished difference Result 5956 states and 6793 transitions. [2022-11-03 02:12:01,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-11-03 02:12:01,044 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 1.9597701149425288) internal successors, (341), 174 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-03 02:12:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:01,060 INFO L225 Difference]: With dead ends: 5956 [2022-11-03 02:12:01,060 INFO L226 Difference]: Without dead ends: 5954 [2022-11-03 02:12:01,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 437 SyntacticMatches, 45 SemanticMatches, 360 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43121 ImplicationChecksByTransitivity, 172.8s TimeCoverageRelationStatistics Valid=16214, Invalid=114468, Unknown=0, NotChecked=0, Total=130682 [2022-11-03 02:12:01,071 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 2302 mSDsluCounter, 9667 mSDsCounter, 0 mSdLazyCounter, 3260 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 9802 SdHoareTripleChecker+Invalid, 14037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 3260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10514 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:01,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 9802 Invalid, 14037 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [263 Valid, 3260 Invalid, 0 Unknown, 10514 Unchecked, 3.8s Time] [2022-11-03 02:12:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5954 states. [2022-11-03 02:12:01,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5954 to 1641. [2022-11-03 02:12:01,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 1.149390243902439) internal successors, (1885), 1640 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 1885 transitions. [2022-11-03 02:12:01,239 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 1885 transitions. Word has length 102 [2022-11-03 02:12:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:01,240 INFO L495 AbstractCegarLoop]: Abstraction has 1641 states and 1885 transitions. [2022-11-03 02:12:01,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 1.9597701149425288) internal successors, (341), 174 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:12:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 1885 transitions. [2022-11-03 02:12:01,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:12:01,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:01,244 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:12:01,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:01,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:01,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:01,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:01,860 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:01,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1887875143, now seen corresponding path program 3 times [2022-11-03 02:12:01,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:12:01,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391101055] [2022-11-03 02:12:01,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:12:01,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:12:01,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:12:01,863 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:12:01,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:12:02,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:12:02,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:12:02,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-03 02:12:02,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:12:11,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:12:38,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:12:38,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391101055] [2022-11-03 02:12:38,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391101055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:38,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [176597451] [2022-11-03 02:12:38,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:12:38,747 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:12:38,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:12:38,748 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:12:38,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 02:12:39,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:12:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:12:39,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-03 02:12:39,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:12:46,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:12:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:12:58,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [176597451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:12:58,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968083418] [2022-11-03 02:12:58,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:12:58,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:58,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:58,856 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:58,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 02:12:59,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:12:59,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:12:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-03 02:12:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 34 proven. 70 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:13:07,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 30 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:13:29,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968083418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:29,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:13:29,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28, 27, 28, 28] total 80 [2022-11-03 02:13:29,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044044537] [2022-11-03 02:13:29,462 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:13:29,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-03 02:13:29,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:13:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-03 02:13:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=6058, Unknown=0, NotChecked=0, Total=6320 [2022-11-03 02:13:29,465 INFO L87 Difference]: Start difference. First operand 1641 states and 1885 transitions. Second operand has 80 states, 80 states have (on average 3.475) internal successors, (278), 80 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:47,396 INFO L93 Difference]: Finished difference Result 1774 states and 2029 transitions. [2022-11-03 02:13:47,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:13:47,397 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.475) internal successors, (278), 80 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-03 02:13:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:47,400 INFO L225 Difference]: With dead ends: 1774 [2022-11-03 02:13:47,400 INFO L226 Difference]: Without dead ends: 1772 [2022-11-03 02:13:47,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 520 SyntacticMatches, 13 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3364 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=749, Invalid=12591, Unknown=0, NotChecked=0, Total=13340 [2022-11-03 02:13:47,402 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 100 mSDsluCounter, 2263 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2322 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1058 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:47,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 2322 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 1058 Unchecked, 0.1s Time] [2022-11-03 02:13:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-11-03 02:13:47,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 837. [2022-11-03 02:13:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 1.1279904306220097) internal successors, (943), 836 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:47,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 943 transitions. [2022-11-03 02:13:47,494 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 943 transitions. Word has length 102 [2022-11-03 02:13:47,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:47,494 INFO L495 AbstractCegarLoop]: Abstraction has 837 states and 943 transitions. [2022-11-03 02:13:47,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.475) internal successors, (278), 80 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:13:47,495 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 943 transitions. [2022-11-03 02:13:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:13:47,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:47,498 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:13:47,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:47,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:47,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:48,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:13:48,111 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:48,111 INFO L85 PathProgramCache]: Analyzing trace with hash 290261821, now seen corresponding path program 1 times [2022-11-03 02:13:48,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:13:48,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477117165] [2022-11-03 02:13:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:48,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:13:48,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:13:48,113 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:13:48,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:13:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 154 conjunts are in the unsatisfiable core [2022-11-03 02:13:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:57,672 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 37 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:13:57,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 49 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:14:53,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:53,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477117165] [2022-11-03 02:14:53,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477117165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:53,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1969233673] [2022-11-03 02:14:53,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:53,067 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:53,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:53,069 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:53,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 02:14:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:53,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-03 02:14:53,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 29 proven. 63 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:15:00,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:15:15,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1969233673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:15,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428387724] [2022-11-03 02:15:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:15,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:15,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:15,800 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:15,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-03 02:15:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:15,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-03 02:15:15,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:15:18,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:15:28,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428387724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:28,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:28,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 43, 38, 40, 39] total 132 [2022-11-03 02:15:28,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501614619] [2022-11-03 02:15:28,202 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:28,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-11-03 02:15:28,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-11-03 02:15:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1154, Invalid=16138, Unknown=0, NotChecked=0, Total=17292 [2022-11-03 02:15:28,204 INFO L87 Difference]: Start difference. First operand 837 states and 943 transitions. Second operand has 132 states, 132 states have (on average 2.4393939393939394) internal successors, (322), 132 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:06,347 INFO L93 Difference]: Finished difference Result 3109 states and 3472 transitions. [2022-11-03 02:16:06,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-11-03 02:16:06,347 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.4393939393939394) internal successors, (322), 132 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2022-11-03 02:16:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:06,354 INFO L225 Difference]: With dead ends: 3109 [2022-11-03 02:16:06,355 INFO L226 Difference]: Without dead ends: 3107 [2022-11-03 02:16:06,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 474 SyntacticMatches, 18 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12182 ImplicationChecksByTransitivity, 99.9s TimeCoverageRelationStatistics Valid=2318, Invalid=35512, Unknown=0, NotChecked=0, Total=37830 [2022-11-03 02:16:06,358 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 835 mSDsluCounter, 4745 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 4812 SdHoareTripleChecker+Invalid, 2419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2318 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:06,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 4812 Invalid, 2419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 2318 Unchecked, 0.1s Time] [2022-11-03 02:16:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2022-11-03 02:16:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2592. [2022-11-03 02:16:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2591 states have (on average 1.126206098031648) internal successors, (2918), 2591 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:06,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 2918 transitions. [2022-11-03 02:16:06,596 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 2918 transitions. Word has length 102 [2022-11-03 02:16:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:06,596 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 2918 transitions. [2022-11-03 02:16:06,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.4393939393939394) internal successors, (322), 132 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:16:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 2918 transitions. [2022-11-03 02:16:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:16:06,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:06,601 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:06,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:06,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:07,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:07,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:07,215 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash -258950083, now seen corresponding path program 3 times [2022-11-03 02:16:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:07,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261192975] [2022-11-03 02:16:07,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:16:07,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:07,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:07,217 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:07,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90c01714-9b27-44cb-8988-4bae3595339b/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-03 02:16:07,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:16:07,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:07,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 156 conjunts are in the unsatisfiable core [2022-11-03 02:16:07,368 INFO L286 TraceCheckSpWp]: Computing forward predicates...