./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/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 3eb113140124fef67732f40fc61a49bd06a18a65880ac225aa4f334e11de8939 --- 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 02:14:07,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:14:07,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:14:07,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:14:07,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:14:07,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:14:07,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:14:07,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:14:07,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:14:07,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:14:07,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:14:07,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:14:07,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:14:07,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:14:07,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:14:07,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:14:07,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:14:07,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:14:07,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:14:07,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:14:07,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:14:07,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:14:07,561 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:14:07,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:14:07,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:14:07,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:14:07,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:14:07,567 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:14:07,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:14:07,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:14:07,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:14:07,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:14:07,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:14:07,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:14:07,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:14:07,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:14:07,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:14:07,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:14:07,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:14:07,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:14:07,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:14:07,585 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:14:07,635 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:14:07,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:14:07,636 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:14:07,636 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:14:07,637 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:14:07,637 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:14:07,637 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:14:07,638 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:14:07,638 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:14:07,638 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:14:07,639 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:14:07,640 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:14:07,640 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:14:07,640 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:14:07,640 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:14:07,641 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:14:07,641 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:14:07,641 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:14:07,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:14:07,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:14:07,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:14:07,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:14:07,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:14:07,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:14:07,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:14:07,645 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:14:07,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:14:07,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:14:07,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:14:07,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:14:07,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:14:07,647 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:14:07,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:14:07,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:14:07,648 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:14:07,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:14:07,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:14:07,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:14:07,648 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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eb113140124fef67732f40fc61a49bd06a18a65880ac225aa4f334e11de8939 [2022-11-03 02:14:07,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:14:07,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:14:07,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:14:07,971 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:14:07,971 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:14:07,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c [2022-11-03 02:14:08,036 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/data/a97857b39/52a33489cdf24589b7edb84fef7da397/FLAGbb916f2fb [2022-11-03 02:14:08,550 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:14:08,551 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c [2022-11-03 02:14:08,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/data/a97857b39/52a33489cdf24589b7edb84fef7da397/FLAGbb916f2fb [2022-11-03 02:14:08,902 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/data/a97857b39/52a33489cdf24589b7edb84fef7da397 [2022-11-03 02:14:08,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:14:08,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:14:08,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:14:08,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:14:08,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:14:08,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:14:08" (1/1) ... [2022-11-03 02:14:08,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c9137eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:08, skipping insertion in model container [2022-11-03 02:14:08,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:14:08" (1/1) ... [2022-11-03 02:14:08,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:14:08,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:14:09,140 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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c[1107,1120] [2022-11-03 02:14:09,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:09,268 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:14:09,279 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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c[1107,1120] [2022-11-03 02:14:09,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:09,365 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:14:09,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09 WrapperNode [2022-11-03 02:14:09,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:14:09,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:14:09,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:14:09,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:14:09,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,461 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 577 [2022-11-03 02:14:09,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:14:09,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:14:09,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:14:09,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:14:09,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,525 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:14:09,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:14:09,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:14:09,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:14:09,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (1/1) ... [2022-11-03 02:14:09,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:14:09,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:09,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:14:09,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:14:09,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:14:09,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:14:09,836 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:14:09,839 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:14:10,782 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:14:11,547 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:14:11,548 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:14:11,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:14:11 BoogieIcfgContainer [2022-11-03 02:14:11,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:14:11,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:14:11,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:14:11,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:14:11,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:14:08" (1/3) ... [2022-11-03 02:14:11,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188f92ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:14:11, skipping insertion in model container [2022-11-03 02:14:11,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:09" (2/3) ... [2022-11-03 02:14:11,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188f92ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:14:11, skipping insertion in model container [2022-11-03 02:14:11,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:14:11" (3/3) ... [2022-11-03 02:14:11,563 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c [2022-11-03 02:14:11,583 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:14:11,583 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:14:11,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:14:11,665 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@dde510c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:14:11,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:14:11,685 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 02:14:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:14:11,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:11,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:14:11,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:11,702 INFO L85 PathProgramCache]: Analyzing trace with hash 9960222, now seen corresponding path program 1 times [2022-11-03 02:14:11,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:11,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471392076] [2022-11-03 02:14:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:11,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:14:12,088 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:14:12,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:14:12,207 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:14:12,209 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:14:12,211 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:14:12,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:14:12,219 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:14:12,224 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:14:12,251 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:14:12,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:14:12 BoogieIcfgContainer [2022-11-03 02:14:12,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:14:12,262 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:14:12,262 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:14:12,263 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:14:12,263 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:14:11" (3/4) ... [2022-11-03 02:14:12,266 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:14:12,267 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:14:12,268 INFO L158 Benchmark]: Toolchain (without parser) took 3360.60ms. Allocated memory was 115.3MB in the beginning and 184.5MB in the end (delta: 69.2MB). Free memory was 69.9MB in the beginning and 119.6MB in the end (delta: -49.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-03 02:14:12,269 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 115.3MB. Free memory is still 87.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:14:12,269 INFO L158 Benchmark]: CACSL2BoogieTranslator took 455.65ms. Allocated memory is still 115.3MB. Free memory was 69.7MB in the beginning and 80.0MB in the end (delta: -10.3MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2022-11-03 02:14:12,270 INFO L158 Benchmark]: Boogie Procedure Inliner took 95.20ms. Allocated memory is still 115.3MB. Free memory was 80.0MB in the beginning and 74.2MB in the end (delta: 5.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:14:12,271 INFO L158 Benchmark]: Boogie Preprocessor took 88.63ms. Allocated memory is still 115.3MB. Free memory was 74.2MB in the beginning and 70.4MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:14:12,272 INFO L158 Benchmark]: RCFGBuilder took 1999.41ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 70.4MB in the beginning and 50.0MB in the end (delta: 20.4MB). Peak memory consumption was 53.1MB. Max. memory is 16.1GB. [2022-11-03 02:14:12,273 INFO L158 Benchmark]: TraceAbstraction took 707.64ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 48.9MB in the beginning and 119.6MB in the end (delta: -70.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:14:12,273 INFO L158 Benchmark]: Witness Printer took 4.76ms. Allocated memory is still 184.5MB. Free memory is still 119.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:14:12,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 115.3MB. Free memory is still 87.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 455.65ms. Allocated memory is still 115.3MB. Free memory was 69.7MB in the beginning and 80.0MB in the end (delta: -10.3MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 95.20ms. Allocated memory is still 115.3MB. Free memory was 80.0MB in the beginning and 74.2MB in the end (delta: 5.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 88.63ms. Allocated memory is still 115.3MB. Free memory was 74.2MB in the beginning and 70.4MB in the end (delta: 3.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1999.41ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 70.4MB in the beginning and 50.0MB in the end (delta: 20.4MB). Peak memory consumption was 53.1MB. Max. memory is 16.1GB. * TraceAbstraction took 707.64ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 48.9MB in the beginning and 119.6MB in the end (delta: -70.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.76ms. Allocated memory is still 184.5MB. Free memory is still 119.6MB. There was no memory consumed. 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 bitwiseComplement at line 165, overapproximation of bitwiseOr at line 163, overapproximation of bitwiseAnd at line 150. 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_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L31] const SORT_10 mask_SORT_10 = (SORT_10)-1 >> (sizeof(SORT_10) * 8 - 32); [L32] const SORT_10 msb_SORT_10 = (SORT_10)1 << (32 - 1); [L34] const SORT_33 mask_SORT_33 = (SORT_33)-1 >> (sizeof(SORT_33) * 8 - 4); [L35] const SORT_33 msb_SORT_33 = (SORT_33)1 << (4 - 1); [L37] const SORT_69 mask_SORT_69 = (SORT_69)-1 >> (sizeof(SORT_69) * 8 - 10); [L38] const SORT_69 msb_SORT_69 = (SORT_69)1 << (10 - 1); [L40] const SORT_3 var_7 = 0; [L41] const SORT_10 var_12 = 0; [L42] const SORT_1 var_14 = 0; [L43] const SORT_10 var_18 = 1; [L44] const SORT_1 var_23 = 1; [L45] const SORT_69 var_70 = 0; [L46] const SORT_10 var_113 = 104; [L48] SORT_1 input_2; [L49] SORT_3 input_4; [L50] SORT_1 input_5; [L51] SORT_1 input_6; [L52] SORT_1 input_31; [L53] SORT_33 input_34; [L54] SORT_1 input_36; [L55] SORT_33 input_38; [L56] SORT_1 input_40; [L57] SORT_1 input_42; [L58] SORT_1 input_48; [L59] SORT_1 input_50; [L60] SORT_1 input_52; [L61] SORT_1 input_57; [L62] SORT_1 input_67; [L63] SORT_3 input_75; [L64] SORT_1 input_82; [L65] SORT_1 input_89; [L66] SORT_1 input_95; [L67] SORT_1 input_101; [L68] SORT_1 input_107; [L69] SORT_1 input_108; [L70] SORT_1 input_109; [L71] SORT_1 input_126; [L72] SORT_69 input_136; [L73] SORT_1 input_144; [L74] SORT_1 input_145; [L75] SORT_1 input_146; [L77] SORT_3 state_8 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L78] SORT_1 state_15 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L79] SORT_1 state_27 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L80] SORT_1 state_29 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L81] SORT_1 state_44 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L82] SORT_1 state_46 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L83] SORT_1 state_54 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L84] SORT_1 state_59 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L85] SORT_1 state_61 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L86] SORT_1 state_63 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L87] SORT_1 state_65 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L88] SORT_69 state_71 = __VERIFIER_nondet_ushort() & mask_SORT_69; [L89] SORT_1 state_73 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L91] SORT_3 init_9_arg_1 = var_7; [L92] state_8 = init_9_arg_1 [L93] SORT_1 init_16_arg_1 = var_14; [L94] state_15 = init_16_arg_1 [L95] SORT_1 init_28_arg_1 = var_14; [L96] state_27 = init_28_arg_1 [L97] SORT_1 init_30_arg_1 = var_14; [L98] state_29 = init_30_arg_1 [L99] SORT_1 init_45_arg_1 = var_14; [L100] state_44 = init_45_arg_1 [L101] SORT_1 init_47_arg_1 = var_14; [L102] state_46 = init_47_arg_1 [L103] SORT_1 init_55_arg_1 = var_23; [L104] state_54 = init_55_arg_1 [L105] SORT_1 init_60_arg_1 = var_14; [L106] state_59 = init_60_arg_1 [L107] SORT_1 init_62_arg_1 = var_14; [L108] state_61 = init_62_arg_1 [L109] SORT_1 init_64_arg_1 = var_14; [L110] state_63 = init_64_arg_1 [L111] SORT_1 init_66_arg_1 = var_14; [L112] state_65 = init_66_arg_1 [L113] SORT_69 init_72_arg_1 = var_70; [L114] state_71 = init_72_arg_1 [L115] SORT_1 init_74_arg_1 = var_14; [L116] state_73 = init_74_arg_1 VAL [init_16_arg_1=0, init_28_arg_1=0, init_30_arg_1=0, init_45_arg_1=0, init_47_arg_1=0, init_55_arg_1=1, init_60_arg_1=0, init_62_arg_1=0, init_64_arg_1=0, init_66_arg_1=0, init_72_arg_1=0, init_74_arg_1=0, init_9_arg_1=0, mask_SORT_1=1, mask_SORT_10=4294967295, mask_SORT_3=255, mask_SORT_33=15, mask_SORT_69=1023, msb_SORT_1=1, msb_SORT_10=2147483648, msb_SORT_3=128, msb_SORT_33=8, msb_SORT_69=512, state_15=0, state_27=0, state_29=0, state_44=0, state_46=0, state_54=1, state_59=0, state_61=0, state_63=0, state_65=0, state_71=0, state_73=0, state_8=0, var_113=104, var_12=0, var_14=0, var_18=1, var_23=1, var_7=0, var_70=0] [L119] input_2 = __VERIFIER_nondet_uchar() [L120] input_4 = __VERIFIER_nondet_uchar() [L121] input_5 = __VERIFIER_nondet_uchar() [L122] input_6 = __VERIFIER_nondet_uchar() [L123] input_31 = __VERIFIER_nondet_uchar() [L124] input_34 = __VERIFIER_nondet_uchar() [L125] input_36 = __VERIFIER_nondet_uchar() [L126] input_38 = __VERIFIER_nondet_uchar() [L127] input_40 = __VERIFIER_nondet_uchar() [L128] input_42 = __VERIFIER_nondet_uchar() [L129] input_48 = __VERIFIER_nondet_uchar() [L130] input_50 = __VERIFIER_nondet_uchar() [L131] input_52 = __VERIFIER_nondet_uchar() [L132] input_57 = __VERIFIER_nondet_uchar() [L133] input_67 = __VERIFIER_nondet_uchar() [L134] input_75 = __VERIFIER_nondet_uchar() [L135] input_82 = __VERIFIER_nondet_uchar() [L136] input_89 = __VERIFIER_nondet_uchar() [L137] input_95 = __VERIFIER_nondet_uchar() [L138] input_101 = __VERIFIER_nondet_uchar() [L139] input_107 = __VERIFIER_nondet_uchar() [L140] input_108 = __VERIFIER_nondet_uchar() [L141] input_109 = __VERIFIER_nondet_uchar() [L142] input_126 = __VERIFIER_nondet_uchar() [L143] input_136 = __VERIFIER_nondet_ushort() [L144] input_144 = __VERIFIER_nondet_uchar() [L145] input_145 = __VERIFIER_nondet_uchar() [L146] input_146 = __VERIFIER_nondet_uchar() [L149] SORT_3 var_11_arg_0 = state_8; [L150] var_11_arg_0 = var_11_arg_0 & mask_SORT_3 [L151] SORT_10 var_11 = var_11_arg_0; [L152] SORT_10 var_13_arg_0 = var_11; [L153] SORT_10 var_13_arg_1 = var_12; [L154] SORT_1 var_13 = var_13_arg_0 == var_13_arg_1; [L155] SORT_1 var_17_arg_0 = state_15; [L156] var_17_arg_0 = var_17_arg_0 & mask_SORT_1 [L157] SORT_10 var_17 = var_17_arg_0; [L158] SORT_10 var_19_arg_0 = var_17; [L159] SORT_10 var_19_arg_1 = var_18; [L160] SORT_1 var_19 = var_19_arg_0 == var_19_arg_1; [L161] SORT_1 var_20_arg_0 = var_13; [L162] SORT_1 var_20_arg_1 = var_19; [L163] SORT_1 var_20 = var_20_arg_0 | var_20_arg_1; [L164] SORT_1 var_24_arg_0 = var_20; [L165] SORT_1 var_24 = ~var_24_arg_0; [L166] SORT_1 var_25_arg_0 = var_23; [L167] SORT_1 var_25_arg_1 = var_24; [L168] SORT_1 var_25 = var_25_arg_0 & var_25_arg_1; [L169] var_25 = var_25 & mask_SORT_1 [L170] SORT_1 bad_26_arg_0 = var_25; [L171] CALL __VERIFIER_assert(!(bad_26_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: 0.6s, 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, 0.3s 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 02:14:12,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/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 3eb113140124fef67732f40fc61a49bd06a18a65880ac225aa4f334e11de8939 --- 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 02:14:14,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:14:14,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:14:14,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:14:14,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:14:14,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:14:14,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:14:14,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:14:14,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:14:14,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:14:14,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:14:14,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:14:14,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:14:14,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:14:14,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:14:14,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:14:14,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:14:14,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:14:14,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:14:14,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:14:14,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:14:14,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:14:14,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:14:14,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:14:14,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:14:14,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:14:14,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:14:14,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:14:14,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:14:14,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:14:14,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:14:14,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:14:14,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:14:14,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:14:14,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:14:14,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:14:14,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:14:14,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:14:14,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:14:14,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:14:14,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:14:14,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:14:14,981 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:14:14,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:14:14,982 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:14:14,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:14:14,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:14:14,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:14:14,984 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:14:14,984 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:14:14,984 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:14:14,985 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:14:14,985 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:14:14,985 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:14:14,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:14:14,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:14:14,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:14:14,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:14:14,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:14:14,987 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:14:14,987 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:14:14,988 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:14:14,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:14:14,988 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:14:14,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:14:14,989 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:14:14,989 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:14:14,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:14:14,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:14:14,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:14:14,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:14:14,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:14:14,991 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:14:14,991 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:14,991 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:14:14,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:14:14,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:14:14,992 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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3eb113140124fef67732f40fc61a49bd06a18a65880ac225aa4f334e11de8939 [2022-11-03 02:14:15,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:14:15,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:14:15,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:14:15,457 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:14:15,458 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:14:15,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c [2022-11-03 02:14:15,540 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/data/3f24cf3c3/596e227b91124b64b54956df24a9a1a0/FLAGbd1458e37 [2022-11-03 02:14:16,149 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:14:16,150 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c [2022-11-03 02:14:16,159 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/data/3f24cf3c3/596e227b91124b64b54956df24a9a1a0/FLAGbd1458e37 [2022-11-03 02:14:16,469 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/data/3f24cf3c3/596e227b91124b64b54956df24a9a1a0 [2022-11-03 02:14:16,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:14:16,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:14:16,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:14:16,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:14:16,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:14:16,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:16,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52e77ce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16, skipping insertion in model container [2022-11-03 02:14:16,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:16,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:14:16,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:14:16,651 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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c[1107,1120] [2022-11-03 02:14:16,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:16,836 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:14:16,858 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_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c[1107,1120] [2022-11-03 02:14:16,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:14:16,951 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:14:16,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16 WrapperNode [2022-11-03 02:14:16,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:14:16,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:14:16,954 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:14:16,954 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:14:16,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:16,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:17,013 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 577 [2022-11-03 02:14:17,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:14:17,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:14:17,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:14:17,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:14:17,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:17,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:17,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:17,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:17,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:17,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:17,051 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:17,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:17,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:14:17,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:14:17,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:14:17,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:14:17,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (1/1) ... [2022-11-03 02:14:17,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:14:17,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:17,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:14:17,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:14:17,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:14:17,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:14:17,343 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:14:17,346 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:14:17,947 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:14:17,961 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:14:17,972 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:14:17,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:14:17 BoogieIcfgContainer [2022-11-03 02:14:17,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:14:17,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:14:17,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:14:17,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:14:17,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:14:16" (1/3) ... [2022-11-03 02:14:17,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d1d626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:14:17, skipping insertion in model container [2022-11-03 02:14:17,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:14:16" (2/3) ... [2022-11-03 02:14:17,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d1d626 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:14:17, skipping insertion in model container [2022-11-03 02:14:17,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:14:17" (3/3) ... [2022-11-03 02:14:17,986 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vcegar_QF_BV_itc99_b13_p22.c [2022-11-03 02:14:18,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:14:18,004 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:14:18,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:14:18,097 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;@7861f09f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:14:18,097 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:14:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 87 states have (on average 1.4942528735632183) internal successors, (130), 88 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:14:18,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:18,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:14:18,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:18,119 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:14:18,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:18,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86175518] [2022-11-03 02:14:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:18,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:18,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:18,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:18,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:14:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:18,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 02:14:18,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:18,554 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 02:14:18,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:18,555 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86175518] [2022-11-03 02:14:18,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86175518] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:18,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:18,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:18,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348428025] [2022-11-03 02:14:18,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:18,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:18,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:18,595 INFO L87 Difference]: Start difference. First operand has 89 states, 87 states have (on average 1.4942528735632183) internal successors, (130), 88 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 02:14:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:18,731 INFO L93 Difference]: Finished difference Result 254 states and 381 transitions. [2022-11-03 02:14:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:18,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2022-11-03 02:14:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:18,743 INFO L225 Difference]: With dead ends: 254 [2022-11-03 02:14:18,743 INFO L226 Difference]: Without dead ends: 167 [2022-11-03 02:14:18,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 02:14:18,750 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 237 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:18,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 342 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:14:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-03 02:14:18,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 87. [2022-11-03 02:14:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 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 02:14:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2022-11-03 02:14:18,789 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 5 [2022-11-03 02:14:18,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:18,790 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2022-11-03 02:14:18,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 02:14:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2022-11-03 02:14:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:18,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:18,793 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:18,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-03 02:14:19,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:19,005 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:19,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:19,006 INFO L85 PathProgramCache]: Analyzing trace with hash -779517679, now seen corresponding path program 1 times [2022-11-03 02:14:19,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:19,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986931989] [2022-11-03 02:14:19,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:19,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:19,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:19,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:19,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:14:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:19,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:19,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:19,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986931989] [2022-11-03 02:14:19,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986931989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:19,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:19,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:19,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449990021] [2022-11-03 02:14:19,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:19,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:19,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:19,408 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:19,484 INFO L93 Difference]: Finished difference Result 331 states and 486 transitions. [2022-11-03 02:14:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:19,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:19,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:19,487 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:19,490 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:19,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:19,493 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 351 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 477 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 02:14:19,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 477 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:19,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 89. [2022-11-03 02:14:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.4545454545454546) internal successors, (128), 88 states have internal predecessors, (128), 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 02:14:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 128 transitions. [2022-11-03 02:14:19,515 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 128 transitions. Word has length 86 [2022-11-03 02:14:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:19,516 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 128 transitions. [2022-11-03 02:14:19,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:19,521 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 128 transitions. [2022-11-03 02:14:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:19,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:19,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:19,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:19,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:19,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:19,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1837355757, now seen corresponding path program 1 times [2022-11-03 02:14:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:19,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113716232] [2022-11-03 02:14:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:19,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:19,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:19,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:19,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:14:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:20,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:14:20,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:20,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:20,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:20,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113716232] [2022-11-03 02:14:20,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113716232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:20,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:20,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:14:20,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857515236] [2022-11-03 02:14:20,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:20,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:14:20,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:20,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:14:20,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:14:20,162 INFO L87 Difference]: Start difference. First operand 89 states and 128 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:14:20,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:20,360 INFO L93 Difference]: Finished difference Result 256 states and 373 transitions. [2022-11-03 02:14:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:14:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:20,362 INFO L225 Difference]: With dead ends: 256 [2022-11-03 02:14:20,362 INFO L226 Difference]: Without dead ends: 173 [2022-11-03 02:14:20,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:14:20,364 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 350 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:20,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 558 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:14:20,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-03 02:14:20,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 91. [2022-11-03 02:14:20,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.4444444444444444) internal successors, (130), 90 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2022-11-03 02:14:20,373 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 86 [2022-11-03 02:14:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:20,373 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2022-11-03 02:14:20,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 02:14:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2022-11-03 02:14:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:20,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:20,376 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:20,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:20,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:20,594 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:20,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash -2077595503, now seen corresponding path program 1 times [2022-11-03 02:14:20,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:20,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900843679] [2022-11-03 02:14:20,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:20,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:20,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:20,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:20,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:14:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:20,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:20,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:20,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:20,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:20,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900843679] [2022-11-03 02:14:20,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900843679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:20,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:20,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:20,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960589907] [2022-11-03 02:14:20,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:20,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:20,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:20,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:20,887 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:20,929 INFO L93 Difference]: Finished difference Result 331 states and 484 transitions. [2022-11-03 02:14:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:20,931 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:20,931 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:20,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:20,933 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 339 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:20,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 466 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 93. [2022-11-03 02:14:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.434782608695652) internal successors, (132), 92 states have internal predecessors, (132), 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 02:14:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 132 transitions. [2022-11-03 02:14:20,940 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 132 transitions. Word has length 86 [2022-11-03 02:14:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:20,941 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 132 transitions. [2022-11-03 02:14:20,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 132 transitions. [2022-11-03 02:14:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:20,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:20,942 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:20,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:21,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:21,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2050529901, now seen corresponding path program 1 times [2022-11-03 02:14:21,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:21,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010963078] [2022-11-03 02:14:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:21,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:21,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:21,158 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:21,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:14:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:21,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:21,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:21,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:21,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:21,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010963078] [2022-11-03 02:14:21,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010963078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:21,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:21,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422849646] [2022-11-03 02:14:21,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:21,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:21,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:21,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:21,470 INFO L87 Difference]: Start difference. First operand 93 states and 132 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:21,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:21,514 INFO L93 Difference]: Finished difference Result 331 states and 483 transitions. [2022-11-03 02:14:21,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:21,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:21,516 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:21,516 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:21,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:21,519 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 333 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:21,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 465 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 95. [2022-11-03 02:14:21,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.425531914893617) internal successors, (134), 94 states have internal predecessors, (134), 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 02:14:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 134 transitions. [2022-11-03 02:14:21,544 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 134 transitions. Word has length 86 [2022-11-03 02:14:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:21,545 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 134 transitions. [2022-11-03 02:14:21,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 134 transitions. [2022-11-03 02:14:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:21,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:21,547 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:21,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:21,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:21,748 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash -316425451, now seen corresponding path program 1 times [2022-11-03 02:14:21,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:21,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347931317] [2022-11-03 02:14:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:21,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:21,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:21,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:21,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:14:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:22,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:22,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:22,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:22,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347931317] [2022-11-03 02:14:22,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347931317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:22,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:22,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514065279] [2022-11-03 02:14:22,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:22,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:22,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:22,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:22,043 INFO L87 Difference]: Start difference. First operand 95 states and 134 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:22,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:22,086 INFO L93 Difference]: Finished difference Result 331 states and 482 transitions. [2022-11-03 02:14:22,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:22,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:22,088 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:22,088 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:22,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:22,092 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 322 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:22,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 464 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 99. [2022-11-03 02:14:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.4183673469387754) internal successors, (139), 98 states have internal predecessors, (139), 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 02:14:22,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 139 transitions. [2022-11-03 02:14:22,105 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 139 transitions. Word has length 86 [2022-11-03 02:14:22,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:22,106 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 139 transitions. [2022-11-03 02:14:22,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:22,106 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 139 transitions. [2022-11-03 02:14:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:22,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:22,107 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:22,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:22,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:22,325 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:22,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1283776105, now seen corresponding path program 1 times [2022-11-03 02:14:22,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:22,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412222888] [2022-11-03 02:14:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:22,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:22,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:22,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:22,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:14:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:22,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:22,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:22,626 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:22,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412222888] [2022-11-03 02:14:22,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412222888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:22,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:22,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:22,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629683663] [2022-11-03 02:14:22,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:22,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:22,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:22,641 INFO L87 Difference]: Start difference. First operand 99 states and 139 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:22,698 INFO L93 Difference]: Finished difference Result 331 states and 481 transitions. [2022-11-03 02:14:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:22,700 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:22,700 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:22,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:22,702 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 316 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:22,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 463 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:22,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 101. [2022-11-03 02:14:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.41) internal successors, (141), 100 states have internal predecessors, (141), 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 02:14:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 141 transitions. [2022-11-03 02:14:22,715 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 141 transitions. Word has length 86 [2022-11-03 02:14:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:22,715 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 141 transitions. [2022-11-03 02:14:22,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 141 transitions. [2022-11-03 02:14:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:22,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:22,718 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:22,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:22,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:22,932 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:22,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1776402279, now seen corresponding path program 1 times [2022-11-03 02:14:22,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:22,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442427120] [2022-11-03 02:14:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:22,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:22,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:22,934 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:22,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:14:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:23,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:23,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:23,237 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:23,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442427120] [2022-11-03 02:14:23,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442427120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:23,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:23,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:23,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560100830] [2022-11-03 02:14:23,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:23,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:23,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:23,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:23,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:23,241 INFO L87 Difference]: Start difference. First operand 101 states and 141 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:23,298 INFO L93 Difference]: Finished difference Result 331 states and 480 transitions. [2022-11-03 02:14:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:23,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:23,301 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:23,301 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:23,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:23,305 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 310 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 471 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 02:14:23,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 471 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:23,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 103. [2022-11-03 02:14:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.4019607843137254) internal successors, (143), 102 states have internal predecessors, (143), 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 02:14:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 143 transitions. [2022-11-03 02:14:23,321 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 143 transitions. Word has length 86 [2022-11-03 02:14:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:23,322 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 143 transitions. [2022-11-03 02:14:23,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 143 transitions. [2022-11-03 02:14:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:23,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:23,324 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:23,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:23,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:23,525 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:23,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:23,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1302411291, now seen corresponding path program 1 times [2022-11-03 02:14:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:23,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089634229] [2022-11-03 02:14:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:23,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:23,527 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:23,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:14:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:23,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:23,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:23,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:23,842 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:23,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089634229] [2022-11-03 02:14:23,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089634229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:23,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:23,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:23,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921616691] [2022-11-03 02:14:23,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:23,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:23,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:23,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:23,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:23,845 INFO L87 Difference]: Start difference. First operand 103 states and 143 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:23,884 INFO L93 Difference]: Finished difference Result 331 states and 479 transitions. [2022-11-03 02:14:23,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:23,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:23,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:23,889 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:23,889 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:23,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:23,892 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 294 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:23,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 467 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:23,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 109. [2022-11-03 02:14:23,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3981481481481481) internal successors, (151), 108 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 02:14:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 151 transitions. [2022-11-03 02:14:23,901 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 151 transitions. Word has length 86 [2022-11-03 02:14:23,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:23,901 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 151 transitions. [2022-11-03 02:14:23,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 151 transitions. [2022-11-03 02:14:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:23,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:23,904 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:23,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:24,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:24,117 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:24,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1030981347, now seen corresponding path program 1 times [2022-11-03 02:14:24,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:24,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420589231] [2022-11-03 02:14:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:24,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:24,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:24,120 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:24,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:14:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:24,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:24,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:24,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:24,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420589231] [2022-11-03 02:14:24,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420589231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:24,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:24,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:24,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321005897] [2022-11-03 02:14:24,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:24,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:24,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:24,401 INFO L87 Difference]: Start difference. First operand 109 states and 151 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:24,442 INFO L93 Difference]: Finished difference Result 331 states and 478 transitions. [2022-11-03 02:14:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:24,444 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:24,444 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:24,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:24,445 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 288 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:24,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 466 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:24,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 111. [2022-11-03 02:14:24,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3909090909090909) internal successors, (153), 110 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:14:24,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 153 transitions. [2022-11-03 02:14:24,451 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 153 transitions. Word has length 86 [2022-11-03 02:14:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:24,451 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 153 transitions. [2022-11-03 02:14:24,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:24,452 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 153 transitions. [2022-11-03 02:14:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:24,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:24,453 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:24,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:24,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:24,666 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash -470281569, now seen corresponding path program 1 times [2022-11-03 02:14:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:24,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012848451] [2022-11-03 02:14:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:24,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:24,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:24,669 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:24,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:14:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:24,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:24,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:24,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012848451] [2022-11-03 02:14:24,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012848451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:24,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:24,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:24,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243209409] [2022-11-03 02:14:24,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:24,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:24,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:24,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:24,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:24,983 INFO L87 Difference]: Start difference. First operand 111 states and 153 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:25,022 INFO L93 Difference]: Finished difference Result 331 states and 477 transitions. [2022-11-03 02:14:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:25,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:25,024 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:25,024 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:25,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:25,025 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 277 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:25,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 459 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:25,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 115. [2022-11-03 02:14:25,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3859649122807018) internal successors, (158), 114 states have internal predecessors, (158), 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 02:14:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2022-11-03 02:14:25,030 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 86 [2022-11-03 02:14:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:25,030 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2022-11-03 02:14:25,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2022-11-03 02:14:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:25,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:25,032 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:25,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:25,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:25,245 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:25,246 INFO L85 PathProgramCache]: Analyzing trace with hash 916503841, now seen corresponding path program 1 times [2022-11-03 02:14:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:25,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683614449] [2022-11-03 02:14:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:25,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:25,248 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:25,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:14:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:25,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:25,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:25,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:25,546 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:25,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683614449] [2022-11-03 02:14:25,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683614449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:25,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:25,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:25,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858629544] [2022-11-03 02:14:25,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:25,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:25,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:25,548 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:25,588 INFO L93 Difference]: Finished difference Result 331 states and 476 transitions. [2022-11-03 02:14:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:25,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:25,590 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:25,590 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:25,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:25,591 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 271 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:25,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 464 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:25,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 117. [2022-11-03 02:14:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3793103448275863) internal successors, (160), 116 states have internal predecessors, (160), 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 02:14:25,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 160 transitions. [2022-11-03 02:14:25,596 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 160 transitions. Word has length 86 [2022-11-03 02:14:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:25,597 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 160 transitions. [2022-11-03 02:14:25,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 160 transitions. [2022-11-03 02:14:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:25,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:25,598 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:25,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:25,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:25,811 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:25,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1360404515, now seen corresponding path program 1 times [2022-11-03 02:14:25,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:25,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707505262] [2022-11-03 02:14:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:25,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:25,814 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:25,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:14:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:26,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:26,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:26,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:26,120 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:26,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707505262] [2022-11-03 02:14:26,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707505262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:26,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:26,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:26,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356858466] [2022-11-03 02:14:26,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:26,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:26,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:26,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:26,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:26,123 INFO L87 Difference]: Start difference. First operand 117 states and 160 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:26,165 INFO L93 Difference]: Finished difference Result 331 states and 475 transitions. [2022-11-03 02:14:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:26,167 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:26,167 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:26,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:26,169 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 260 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:26,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 457 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 121. [2022-11-03 02:14:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.375) internal successors, (165), 120 states have internal predecessors, (165), 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 02:14:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 165 transitions. [2022-11-03 02:14:26,174 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 165 transitions. Word has length 86 [2022-11-03 02:14:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:26,174 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 165 transitions. [2022-11-03 02:14:26,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 165 transitions. [2022-11-03 02:14:26,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:26,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:26,175 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:26,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:26,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:26,389 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:26,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1344885797, now seen corresponding path program 1 times [2022-11-03 02:14:26,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:26,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181430602] [2022-11-03 02:14:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:26,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:26,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:26,391 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:26,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:14:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:26,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:14:26,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:26,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:26,819 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:26,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181430602] [2022-11-03 02:14:26,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181430602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:26,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:26,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:26,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502790271] [2022-11-03 02:14:26,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:26,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:26,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:26,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:26,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:26,821 INFO L87 Difference]: Start difference. First operand 121 states and 165 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:14:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:26,901 INFO L93 Difference]: Finished difference Result 370 states and 530 transitions. [2022-11-03 02:14:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:14:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:26,904 INFO L225 Difference]: With dead ends: 370 [2022-11-03 02:14:26,904 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 02:14:26,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 02:14:26,905 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 426 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:26,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 686 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 02:14:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 125. [2022-11-03 02:14:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3709677419354838) internal successors, (170), 124 states have internal predecessors, (170), 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 02:14:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 170 transitions. [2022-11-03 02:14:26,911 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 170 transitions. Word has length 86 [2022-11-03 02:14:26,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:26,913 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 170 transitions. [2022-11-03 02:14:26,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:14:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 170 transitions. [2022-11-03 02:14:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:26,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:26,914 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:26,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-03 02:14:27,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:27,134 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:27,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2056595161, now seen corresponding path program 1 times [2022-11-03 02:14:27,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:27,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313336777] [2022-11-03 02:14:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:27,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:27,137 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:27,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:14:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:27,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:27,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:27,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:27,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313336777] [2022-11-03 02:14:27,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313336777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:27,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:27,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:27,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256042981] [2022-11-03 02:14:27,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:27,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:27,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:27,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:27,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:27,431 INFO L87 Difference]: Start difference. First operand 125 states and 170 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:27,489 INFO L93 Difference]: Finished difference Result 331 states and 473 transitions. [2022-11-03 02:14:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:27,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:27,491 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:27,491 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:27,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:27,492 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 243 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:27,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 443 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 127. [2022-11-03 02:14:27,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.3650793650793651) internal successors, (172), 126 states have internal predecessors, (172), 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 02:14:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 172 transitions. [2022-11-03 02:14:27,497 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 172 transitions. Word has length 86 [2022-11-03 02:14:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:27,498 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 172 transitions. [2022-11-03 02:14:27,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 172 transitions. [2022-11-03 02:14:27,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:27,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:27,499 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:27,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:27,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:27,718 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:27,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1340978857, now seen corresponding path program 1 times [2022-11-03 02:14:27,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:27,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462698451] [2022-11-03 02:14:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:27,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:27,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:27,720 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:27,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:14:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:27,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:14:27,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:28,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:28,126 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:28,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462698451] [2022-11-03 02:14:28,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462698451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:28,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:28,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:28,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546042402] [2022-11-03 02:14:28,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:28,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:28,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:28,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:28,128 INFO L87 Difference]: Start difference. First operand 127 states and 172 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:14:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:28,211 INFO L93 Difference]: Finished difference Result 370 states and 528 transitions. [2022-11-03 02:14:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:14:28,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:28,214 INFO L225 Difference]: With dead ends: 370 [2022-11-03 02:14:28,214 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 02:14:28,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 02:14:28,215 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 412 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:28,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 678 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 02:14:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 129. [2022-11-03 02:14:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.359375) internal successors, (174), 128 states have internal predecessors, (174), 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 02:14:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2022-11-03 02:14:28,220 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 86 [2022-11-03 02:14:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:28,221 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2022-11-03 02:14:28,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:14:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2022-11-03 02:14:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:28,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:28,222 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:28,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:28,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:28,435 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1764625579, now seen corresponding path program 1 times [2022-11-03 02:14:28,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:28,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851141603] [2022-11-03 02:14:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:28,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:28,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:28,438 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:28,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:14:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:28,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:28,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:28,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:28,757 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:28,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851141603] [2022-11-03 02:14:28,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851141603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:28,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:28,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:28,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535801294] [2022-11-03 02:14:28,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:28,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:28,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:28,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:28,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:28,759 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:28,816 INFO L93 Difference]: Finished difference Result 331 states and 471 transitions. [2022-11-03 02:14:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:28,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:28,818 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:28,818 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:28,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:28,819 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 231 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:28,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 441 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 131. [2022-11-03 02:14:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.353846153846154) internal successors, (176), 130 states have internal predecessors, (176), 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 02:14:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 176 transitions. [2022-11-03 02:14:28,824 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 176 transitions. Word has length 86 [2022-11-03 02:14:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:28,824 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 176 transitions. [2022-11-03 02:14:28,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 176 transitions. [2022-11-03 02:14:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:28,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:28,826 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:28,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:29,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:29,039 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:29,039 INFO L85 PathProgramCache]: Analyzing trace with hash -80741587, now seen corresponding path program 1 times [2022-11-03 02:14:29,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:29,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656467527] [2022-11-03 02:14:29,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:29,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:29,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:29,041 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:29,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:14:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:29,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:29,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:29,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:29,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656467527] [2022-11-03 02:14:29,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656467527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:29,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:29,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:29,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662288369] [2022-11-03 02:14:29,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:29,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:29,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:29,337 INFO L87 Difference]: Start difference. First operand 131 states and 176 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:29,392 INFO L93 Difference]: Finished difference Result 331 states and 470 transitions. [2022-11-03 02:14:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:29,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:29,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:29,394 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:29,394 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:29,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:29,395 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 225 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:29,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 440 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:29,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 133. [2022-11-03 02:14:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.3484848484848484) internal successors, (178), 132 states have internal predecessors, (178), 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 02:14:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 178 transitions. [2022-11-03 02:14:29,400 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 178 transitions. Word has length 86 [2022-11-03 02:14:29,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:29,400 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 178 transitions. [2022-11-03 02:14:29,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 178 transitions. [2022-11-03 02:14:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:29,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:29,402 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:29,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:29,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:29,616 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash 578789935, now seen corresponding path program 1 times [2022-11-03 02:14:29,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:29,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324888055] [2022-11-03 02:14:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:29,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:29,618 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:29,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:14:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:29,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:29,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:29,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:29,928 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:29,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324888055] [2022-11-03 02:14:29,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324888055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:29,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:29,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:29,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646914000] [2022-11-03 02:14:29,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:29,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:29,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:29,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:29,932 INFO L87 Difference]: Start difference. First operand 133 states and 178 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:29,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:29,973 INFO L93 Difference]: Finished difference Result 331 states and 469 transitions. [2022-11-03 02:14:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:29,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:29,975 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:29,975 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:29,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:29,976 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 219 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:29,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 451 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:29,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 135. [2022-11-03 02:14:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.3432835820895523) internal successors, (180), 134 states have internal predecessors, (180), 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 02:14:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 180 transitions. [2022-11-03 02:14:29,982 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 180 transitions. Word has length 86 [2022-11-03 02:14:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:29,983 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 180 transitions. [2022-11-03 02:14:29,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 180 transitions. [2022-11-03 02:14:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:29,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:29,984 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:30,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-03 02:14:30,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:30,206 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:30,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash -265215567, now seen corresponding path program 1 times [2022-11-03 02:14:30,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:30,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83616393] [2022-11-03 02:14:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:30,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:30,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:30,207 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:30,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:14:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:30,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:30,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:30,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:30,491 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:30,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83616393] [2022-11-03 02:14:30,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83616393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:30,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:30,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243890197] [2022-11-03 02:14:30,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:30,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:30,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:30,493 INFO L87 Difference]: Start difference. First operand 135 states and 180 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:30,522 INFO L93 Difference]: Finished difference Result 331 states and 468 transitions. [2022-11-03 02:14:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:30,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:30,524 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:30,524 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:30,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:30,525 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 208 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 459 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 02:14:30,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 459 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:30,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 139. [2022-11-03 02:14:30,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 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 02:14:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 185 transitions. [2022-11-03 02:14:30,530 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 185 transitions. Word has length 86 [2022-11-03 02:14:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:30,530 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 185 transitions. [2022-11-03 02:14:30,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 185 transitions. [2022-11-03 02:14:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:30,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:30,532 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:30,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:30,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:30,745 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:30,745 INFO L85 PathProgramCache]: Analyzing trace with hash 436384307, now seen corresponding path program 1 times [2022-11-03 02:14:30,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:30,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651478648] [2022-11-03 02:14:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:30,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:30,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:30,748 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:30,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:14:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:30,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:30,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:31,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:31,074 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651478648] [2022-11-03 02:14:31,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651478648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:31,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:31,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:31,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214149907] [2022-11-03 02:14:31,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:31,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:31,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:31,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:31,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:31,077 INFO L87 Difference]: Start difference. First operand 139 states and 185 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:31,109 INFO L93 Difference]: Finished difference Result 331 states and 467 transitions. [2022-11-03 02:14:31,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:31,111 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:31,111 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:31,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:31,112 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 197 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:31,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 455 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:31,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 143. [2022-11-03 02:14:31,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.3380281690140845) internal successors, (190), 142 states have internal predecessors, (190), 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 02:14:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 190 transitions. [2022-11-03 02:14:31,117 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 190 transitions. Word has length 86 [2022-11-03 02:14:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:31,117 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 190 transitions. [2022-11-03 02:14:31,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 190 transitions. [2022-11-03 02:14:31,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:31,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:31,119 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:31,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:31,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:31,331 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:31,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1935354955, now seen corresponding path program 1 times [2022-11-03 02:14:31,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:31,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400398910] [2022-11-03 02:14:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:31,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:31,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:31,334 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:31,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:14:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:31,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:31,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:31,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:31,647 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:31,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400398910] [2022-11-03 02:14:31,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400398910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:31,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:31,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:31,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295953996] [2022-11-03 02:14:31,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:31,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:31,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:31,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:31,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:31,650 INFO L87 Difference]: Start difference. First operand 143 states and 190 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:31,681 INFO L93 Difference]: Finished difference Result 331 states and 466 transitions. [2022-11-03 02:14:31,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:31,683 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:31,683 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:31,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:31,684 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 191 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:31,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 454 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 145. [2022-11-03 02:14:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.3333333333333333) internal successors, (192), 144 states have internal predecessors, (192), 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 02:14:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2022-11-03 02:14:31,689 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 86 [2022-11-03 02:14:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:31,689 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2022-11-03 02:14:31,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2022-11-03 02:14:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:31,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:31,691 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:31,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:31,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:31,904 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1794806345, now seen corresponding path program 1 times [2022-11-03 02:14:31,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:31,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256006187] [2022-11-03 02:14:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:31,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:31,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:31,906 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:31,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:14:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:32,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:32,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:32,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:32,204 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:32,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256006187] [2022-11-03 02:14:32,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256006187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:32,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:32,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:32,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315364524] [2022-11-03 02:14:32,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:32,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:32,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:32,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:32,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:32,206 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:32,237 INFO L93 Difference]: Finished difference Result 331 states and 465 transitions. [2022-11-03 02:14:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:32,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:32,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:32,239 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:32,239 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:32,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:32,240 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 185 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:32,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 453 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 147. [2022-11-03 02:14:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3287671232876712) internal successors, (194), 146 states have internal predecessors, (194), 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 02:14:32,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 194 transitions. [2022-11-03 02:14:32,245 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 194 transitions. Word has length 86 [2022-11-03 02:14:32,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:32,245 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 194 transitions. [2022-11-03 02:14:32,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:32,246 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 194 transitions. [2022-11-03 02:14:32,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:32,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:32,246 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:32,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:32,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:32,460 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:32,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:32,460 INFO L85 PathProgramCache]: Analyzing trace with hash 694722617, now seen corresponding path program 1 times [2022-11-03 02:14:32,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:32,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858644282] [2022-11-03 02:14:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:32,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:32,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:32,462 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:32,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:14:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:32,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:14:32,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:32,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:32,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:32,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858644282] [2022-11-03 02:14:32,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858644282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:32,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:32,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:32,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213263202] [2022-11-03 02:14:32,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:32,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:32,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:32,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:32,889 INFO L87 Difference]: Start difference. First operand 147 states and 194 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:14:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:32,972 INFO L93 Difference]: Finished difference Result 370 states and 520 transitions. [2022-11-03 02:14:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:14:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:32,974 INFO L225 Difference]: With dead ends: 370 [2022-11-03 02:14:32,974 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 02:14:32,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 02:14:32,976 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 346 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 641 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 02:14:32,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 641 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:32,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 02:14:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 149. [2022-11-03 02:14:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.3243243243243243) internal successors, (196), 148 states have internal predecessors, (196), 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 02:14:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 196 transitions. [2022-11-03 02:14:32,981 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 196 transitions. Word has length 86 [2022-11-03 02:14:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:32,981 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 196 transitions. [2022-11-03 02:14:32,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:14:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 196 transitions. [2022-11-03 02:14:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:32,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:32,982 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:33,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:33,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:33,195 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:33,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1117424443, now seen corresponding path program 1 times [2022-11-03 02:14:33,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:33,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471836237] [2022-11-03 02:14:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:33,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:33,197 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:33,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:14:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:33,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:33,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:33,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:33,528 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:33,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471836237] [2022-11-03 02:14:33,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471836237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:33,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:33,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:33,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820819107] [2022-11-03 02:14:33,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:33,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:33,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:33,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:33,532 INFO L87 Difference]: Start difference. First operand 149 states and 196 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:33,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:33,587 INFO L93 Difference]: Finished difference Result 331 states and 463 transitions. [2022-11-03 02:14:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:33,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:33,589 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:33,591 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:33,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:33,593 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 173 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:33,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 433 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 151. [2022-11-03 02:14:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.32) internal successors, (198), 150 states have internal predecessors, (198), 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 02:14:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 198 transitions. [2022-11-03 02:14:33,599 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 198 transitions. Word has length 86 [2022-11-03 02:14:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:33,599 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 198 transitions. [2022-11-03 02:14:33,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 198 transitions. [2022-11-03 02:14:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:33,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:33,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:33,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:33,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:33,814 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:33,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:33,815 INFO L85 PathProgramCache]: Analyzing trace with hash -571519299, now seen corresponding path program 1 times [2022-11-03 02:14:33,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:33,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274226626] [2022-11-03 02:14:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:33,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:33,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:33,817 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:33,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-03 02:14:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:34,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:34,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:34,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:34,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274226626] [2022-11-03 02:14:34,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274226626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:34,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:34,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:34,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515344192] [2022-11-03 02:14:34,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:34,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:34,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:34,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:34,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:34,157 INFO L87 Difference]: Start difference. First operand 151 states and 198 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:34,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:34,216 INFO L93 Difference]: Finished difference Result 331 states and 462 transitions. [2022-11-03 02:14:34,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:34,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:34,218 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:34,218 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:34,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:34,219 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 167 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:34,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 432 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 153. [2022-11-03 02:14:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.3157894736842106) internal successors, (200), 152 states have internal predecessors, (200), 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 02:14:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 200 transitions. [2022-11-03 02:14:34,237 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 200 transitions. Word has length 86 [2022-11-03 02:14:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:34,237 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 200 transitions. [2022-11-03 02:14:34,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 200 transitions. [2022-11-03 02:14:34,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:34,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:34,239 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:34,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:34,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:34,444 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:34,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2135100095, now seen corresponding path program 1 times [2022-11-03 02:14:34,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:34,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984508316] [2022-11-03 02:14:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:34,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:34,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:34,446 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:34,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-03 02:14:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:34,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:14:34,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:34,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:34,909 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:34,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984508316] [2022-11-03 02:14:34,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984508316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:34,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:34,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:34,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229099511] [2022-11-03 02:14:34,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:34,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:34,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:34,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:34,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:34,911 INFO L87 Difference]: Start difference. First operand 153 states and 200 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:14:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:35,000 INFO L93 Difference]: Finished difference Result 370 states and 517 transitions. [2022-11-03 02:14:35,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:14:35,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:35,005 INFO L225 Difference]: With dead ends: 370 [2022-11-03 02:14:35,005 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 02:14:35,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 02:14:35,006 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 320 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:35,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 626 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:14:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 02:14:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 157. [2022-11-03 02:14:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.314102564102564) internal successors, (205), 156 states have internal predecessors, (205), 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 02:14:35,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 205 transitions. [2022-11-03 02:14:35,011 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 205 transitions. Word has length 86 [2022-11-03 02:14:35,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:35,012 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 205 transitions. [2022-11-03 02:14:35,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:14:35,012 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 205 transitions. [2022-11-03 02:14:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:35,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:35,013 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:35,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:35,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:35,217 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1548294081, now seen corresponding path program 1 times [2022-11-03 02:14:35,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:35,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916895257] [2022-11-03 02:14:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:35,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:35,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:35,219 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:35,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:14:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:35,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:35,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:35,536 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916895257] [2022-11-03 02:14:35,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916895257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:35,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:35,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:35,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687696532] [2022-11-03 02:14:35,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:35,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:35,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:35,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:35,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:35,537 INFO L87 Difference]: Start difference. First operand 157 states and 205 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:35,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:35,591 INFO L93 Difference]: Finished difference Result 331 states and 460 transitions. [2022-11-03 02:14:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:35,593 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:35,593 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:35,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:35,594 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 150 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:35,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 430 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:35,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:35,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 159. [2022-11-03 02:14:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3101265822784811) internal successors, (207), 158 states have internal predecessors, (207), 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 02:14:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 207 transitions. [2022-11-03 02:14:35,599 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 207 transitions. Word has length 86 [2022-11-03 02:14:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:35,600 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 207 transitions. [2022-11-03 02:14:35,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 207 transitions. [2022-11-03 02:14:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:35,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:35,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:35,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:35,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:35,815 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:35,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2045608637, now seen corresponding path program 1 times [2022-11-03 02:14:35,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:35,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504810035] [2022-11-03 02:14:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:35,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:35,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:35,817 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:35,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:14:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:36,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:14:36,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:36,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:36,227 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:36,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504810035] [2022-11-03 02:14:36,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504810035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:36,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:36,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:14:36,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654883204] [2022-11-03 02:14:36,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:36,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:36,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:36,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:36,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:14:36,229 INFO L87 Difference]: Start difference. First operand 159 states and 207 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:14:36,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:36,304 INFO L93 Difference]: Finished difference Result 370 states and 515 transitions. [2022-11-03 02:14:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:14:36,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:36,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:36,306 INFO L225 Difference]: With dead ends: 370 [2022-11-03 02:14:36,306 INFO L226 Difference]: Without dead ends: 287 [2022-11-03 02:14:36,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 02:14:36,307 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 306 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 618 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 02:14:36,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 618 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-03 02:14:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 161. [2022-11-03 02:14:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.30625) internal successors, (209), 160 states have internal predecessors, (209), 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 02:14:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 209 transitions. [2022-11-03 02:14:36,312 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 209 transitions. Word has length 86 [2022-11-03 02:14:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:36,312 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 209 transitions. [2022-11-03 02:14:36,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 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 02:14:36,312 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 209 transitions. [2022-11-03 02:14:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:36,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:36,313 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:36,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:36,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:36,526 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:36,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:36,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1365550267, now seen corresponding path program 1 times [2022-11-03 02:14:36,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:36,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190737196] [2022-11-03 02:14:36,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:36,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:36,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:36,529 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:36,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-03 02:14:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:36,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:36,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:36,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:36,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:36,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190737196] [2022-11-03 02:14:36,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190737196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:36,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:36,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:36,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368467120] [2022-11-03 02:14:36,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:36,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:36,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:36,887 INFO L87 Difference]: Start difference. First operand 161 states and 209 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:36,937 INFO L93 Difference]: Finished difference Result 331 states and 458 transitions. [2022-11-03 02:14:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:36,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:36,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:36,939 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:36,939 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:36,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:36,940 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 138 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:36,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 428 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:36,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:36,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2022-11-03 02:14:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.3024691358024691) internal successors, (211), 162 states have internal predecessors, (211), 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 02:14:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 211 transitions. [2022-11-03 02:14:36,946 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 211 transitions. Word has length 86 [2022-11-03 02:14:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:36,946 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 211 transitions. [2022-11-03 02:14:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 211 transitions. [2022-11-03 02:14:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:36,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:36,947 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:36,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-03 02:14:37,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:37,161 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 409457095, now seen corresponding path program 1 times [2022-11-03 02:14:37,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:37,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997338512] [2022-11-03 02:14:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:37,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:37,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:37,163 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:37,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:14:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:37,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:14:37,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:37,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:37,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:37,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997338512] [2022-11-03 02:14:37,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997338512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:37,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:14:37,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:14:37,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56479635] [2022-11-03 02:14:37,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:37,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:14:37,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:37,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:14:37,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:14:37,499 INFO L87 Difference]: Start difference. First operand 163 states and 211 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:37,553 INFO L93 Difference]: Finished difference Result 331 states and 457 transitions. [2022-11-03 02:14:37,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:14:37,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 86 [2022-11-03 02:14:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:37,555 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:14:37,555 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:14:37,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 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 02:14:37,561 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 132 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:37,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 427 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:37,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:14:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 165. [2022-11-03 02:14:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.298780487804878) internal successors, (213), 164 states have internal predecessors, (213), 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 02:14:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 213 transitions. [2022-11-03 02:14:37,570 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 213 transitions. Word has length 86 [2022-11-03 02:14:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:37,571 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 213 transitions. [2022-11-03 02:14:37,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 02:14:37,571 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 213 transitions. [2022-11-03 02:14:37,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:14:37,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:37,572 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:37,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:37,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:37,786 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:37,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:37,786 INFO L85 PathProgramCache]: Analyzing trace with hash 411304137, now seen corresponding path program 1 times [2022-11-03 02:14:37,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:37,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114599382] [2022-11-03 02:14:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:37,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:37,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:37,787 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:37,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-03 02:14:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:37,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:14:37,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:14:38,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:14:40,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:40,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114599382] [2022-11-03 02:14:40,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114599382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:40,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [52601019] [2022-11-03 02:14:40,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:40,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:40,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:40,122 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:40,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-03 02:14:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:40,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 02:14:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:14:41,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:14:42,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [52601019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897079670] [2022-11-03 02:14:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:42,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:42,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:42,079 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:42,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-03 02:14:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:42,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 02:14:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:14:42,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:14:43,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897079670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:43,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:14:43,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 14 [2022-11-03 02:14:43,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710661060] [2022-11-03 02:14:43,874 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:14:43,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:14:43,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:43,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:14:43,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:14:43,876 INFO L87 Difference]: Start difference. First operand 165 states and 213 transitions. Second operand has 14 states, 14 states have (on average 12.428571428571429) internal successors, (174), 14 states have internal predecessors, (174), 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 02:14:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:44,143 INFO L93 Difference]: Finished difference Result 320 states and 442 transitions. [2022-11-03 02:14:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:14:44,144 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.428571428571429) internal successors, (174), 14 states have internal predecessors, (174), 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 86 [2022-11-03 02:14:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:44,146 INFO L225 Difference]: With dead ends: 320 [2022-11-03 02:14:44,146 INFO L226 Difference]: Without dead ends: 318 [2022-11-03 02:14:44,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 493 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:14:44,147 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 584 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:44,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 1090 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 110 Unchecked, 0.1s Time] [2022-11-03 02:14:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-03 02:14:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 246. [2022-11-03 02:14:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.3591836734693878) internal successors, (333), 245 states have internal predecessors, (333), 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 02:14:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 333 transitions. [2022-11-03 02:14:44,154 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 333 transitions. Word has length 86 [2022-11-03 02:14:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:44,154 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 333 transitions. [2022-11-03 02:14:44,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.428571428571429) internal successors, (174), 14 states have internal predecessors, (174), 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 02:14:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 333 transitions. [2022-11-03 02:14:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:14:44,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:44,156 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:44,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-03 02:14:44,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-03 02:14:44,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-03 02:14:44,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:44,770 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:44,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:44,770 INFO L85 PathProgramCache]: Analyzing trace with hash 784920785, now seen corresponding path program 1 times [2022-11-03 02:14:44,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:44,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996222989] [2022-11-03 02:14:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:44,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:44,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:44,772 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:44,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:14:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:14:45,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:45,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:45,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:45,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996222989] [2022-11-03 02:14:45,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996222989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:45,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701848693] [2022-11-03 02:14:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:45,751 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:45,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:45,754 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:45,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:14:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:46,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:14:46,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:14:46,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:46,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1701848693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:46,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:14:46,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:14:46,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634294123] [2022-11-03 02:14:46,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:14:46,238 INFO L87 Difference]: Start difference. First operand 246 states and 333 transitions. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 02:14:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:46,315 INFO L93 Difference]: Finished difference Result 812 states and 1141 transitions. [2022-11-03 02:14:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:14:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 167 [2022-11-03 02:14:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:46,318 INFO L225 Difference]: With dead ends: 812 [2022-11-03 02:14:46,319 INFO L226 Difference]: Without dead ends: 648 [2022-11-03 02:14:46,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:14:46,320 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 418 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:46,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 673 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-11-03 02:14:46,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 258. [2022-11-03 02:14:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.3579766536964981) internal successors, (349), 257 states have internal predecessors, (349), 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 02:14:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 349 transitions. [2022-11-03 02:14:46,330 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 349 transitions. Word has length 167 [2022-11-03 02:14:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:46,331 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 349 transitions. [2022-11-03 02:14:46,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 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 02:14:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 349 transitions. [2022-11-03 02:14:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:14:46,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:46,332 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:46,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:46,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-03 02:14:46,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:46,748 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:46,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1126121773, now seen corresponding path program 1 times [2022-11-03 02:14:46,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:46,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [607011189] [2022-11-03 02:14:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:46,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:46,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:46,750 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:46,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:14:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:47,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:14:47,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:47,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:47,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [607011189] [2022-11-03 02:14:47,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [607011189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [205007428] [2022-11-03 02:14:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:47,620 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:47,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:47,621 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:47,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:14:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:14:48,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:14:48,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:48,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [205007428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:48,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:14:48,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 13 [2022-11-03 02:14:48,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634530627] [2022-11-03 02:14:48,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:48,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:48,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:48,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:48,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:14:48,138 INFO L87 Difference]: Start difference. First operand 258 states and 349 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 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 02:14:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:48,247 INFO L93 Difference]: Finished difference Result 828 states and 1177 transitions. [2022-11-03 02:14:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:14:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 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 167 [2022-11-03 02:14:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:48,250 INFO L225 Difference]: With dead ends: 828 [2022-11-03 02:14:48,250 INFO L226 Difference]: Without dead ends: 652 [2022-11-03 02:14:48,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:14:48,251 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 357 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:48,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 727 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:14:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2022-11-03 02:14:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 326. [2022-11-03 02:14:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.3815384615384616) internal successors, (449), 325 states have internal predecessors, (449), 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 02:14:48,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 449 transitions. [2022-11-03 02:14:48,264 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 449 transitions. Word has length 167 [2022-11-03 02:14:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:48,265 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 449 transitions. [2022-11-03 02:14:48,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 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 02:14:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 449 transitions. [2022-11-03 02:14:48,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:14:48,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:48,267 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:48,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:48,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:48,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:48,670 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:48,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:48,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1053735215, now seen corresponding path program 1 times [2022-11-03 02:14:48,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:48,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062737699] [2022-11-03 02:14:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:48,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:48,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:48,672 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:48,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:14:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:48,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:14:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:49,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:49,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:49,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062737699] [2022-11-03 02:14:49,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062737699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:49,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525734896] [2022-11-03 02:14:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:49,524 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:49,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:49,525 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:49,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 02:14:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:50,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:14:50,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:50,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 81 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:14:50,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [525734896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:50,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846594730] [2022-11-03 02:14:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:50,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:50,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:50,565 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:50,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-03 02:14:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:50,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:14:50,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:14:51,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 61 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:14:51,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846594730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:51,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:14:51,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2022-11-03 02:14:51,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594779044] [2022-11-03 02:14:51,328 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:14:51,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:14:51,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:51,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:14:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:14:51,330 INFO L87 Difference]: Start difference. First operand 326 states and 449 transitions. Second operand has 17 states, 17 states have (on average 20.529411764705884) internal successors, (349), 17 states have internal predecessors, (349), 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 02:14:53,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:53,263 INFO L93 Difference]: Finished difference Result 2412 states and 3467 transitions. [2022-11-03 02:14:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-03 02:14:53,264 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.529411764705884) internal successors, (349), 17 states have internal predecessors, (349), 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 167 [2022-11-03 02:14:53,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:53,271 INFO L225 Difference]: With dead ends: 2412 [2022-11-03 02:14:53,271 INFO L226 Difference]: Without dead ends: 2110 [2022-11-03 02:14:53,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 979 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=847, Invalid=2345, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 02:14:53,274 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 2961 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2961 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:53,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2961 Valid, 1187 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:14:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2022-11-03 02:14:53,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 344. [2022-11-03 02:14:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.3615160349854227) internal successors, (467), 343 states have internal predecessors, (467), 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 02:14:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 467 transitions. [2022-11-03 02:14:53,298 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 467 transitions. Word has length 167 [2022-11-03 02:14:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:53,298 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 467 transitions. [2022-11-03 02:14:53,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 20.529411764705884) internal successors, (349), 17 states have internal predecessors, (349), 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 02:14:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 467 transitions. [2022-11-03 02:14:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:14:53,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:53,300 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:14:53,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:53,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 02:14:53,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:53,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:53,914 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:53,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:53,914 INFO L85 PathProgramCache]: Analyzing trace with hash -149998635, now seen corresponding path program 1 times [2022-11-03 02:14:53,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:53,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071723230] [2022-11-03 02:14:53,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:53,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:53,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:53,916 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:53,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-03 02:14:54,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:54,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:14:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:14:54,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:14:54,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:54,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071723230] [2022-11-03 02:14:54,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071723230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:54,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [43979032] [2022-11-03 02:14:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:54,920 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:54,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:54,922 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:54,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-03 02:14:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:55,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:14:55,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:14:55,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:55,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [43979032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:55,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:14:55,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 10] total 21 [2022-11-03 02:14:55,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100321178] [2022-11-03 02:14:55,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:55,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:55,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:55,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:14:55,427 INFO L87 Difference]: Start difference. First operand 344 states and 467 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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 02:14:55,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:55,533 INFO L93 Difference]: Finished difference Result 1296 states and 1843 transitions. [2022-11-03 02:14:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:14:55,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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 167 [2022-11-03 02:14:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:55,538 INFO L225 Difference]: With dead ends: 1296 [2022-11-03 02:14:55,538 INFO L226 Difference]: Without dead ends: 1034 [2022-11-03 02:14:55,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 481 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:14:55,539 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 606 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 475 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 02:14:55,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 475 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-11-03 02:14:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 532. [2022-11-03 02:14:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.3917137476459511) internal successors, (739), 531 states have internal predecessors, (739), 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 02:14:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 739 transitions. [2022-11-03 02:14:55,557 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 739 transitions. Word has length 167 [2022-11-03 02:14:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:55,557 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 739 transitions. [2022-11-03 02:14:55,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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 02:14:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 739 transitions. [2022-11-03 02:14:55,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:14:55,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:55,559 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:55,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:55,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:55,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:55,974 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:55,975 INFO L85 PathProgramCache]: Analyzing trace with hash 551601239, now seen corresponding path program 1 times [2022-11-03 02:14:55,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:55,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093692710] [2022-11-03 02:14:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:55,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:55,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:55,977 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:55,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-03 02:14:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:56,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:14:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:14:56,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:14:56,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093692710] [2022-11-03 02:14:56,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093692710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:56,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1270679450] [2022-11-03 02:14:56,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:56,915 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:56,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:56,922 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:56,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-03 02:14:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:57,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:14:57,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:14:57,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:14:57,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1270679450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:57,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:14:57,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 10] total 21 [2022-11-03 02:14:57,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258089540] [2022-11-03 02:14:57,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:57,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:14:57,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:14:57,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:14:57,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:14:57,425 INFO L87 Difference]: Start difference. First operand 532 states and 739 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 02:14:57,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:57,522 INFO L93 Difference]: Finished difference Result 1964 states and 2819 transitions. [2022-11-03 02:14:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:14:57,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 167 [2022-11-03 02:14:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:57,528 INFO L225 Difference]: With dead ends: 1964 [2022-11-03 02:14:57,528 INFO L226 Difference]: Without dead ends: 1514 [2022-11-03 02:14:57,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 481 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:14:57,530 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 514 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:57,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 501 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:14:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2022-11-03 02:14:57,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 780. [2022-11-03 02:14:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 1.41591784338896) internal successors, (1103), 779 states have internal predecessors, (1103), 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 02:14:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1103 transitions. [2022-11-03 02:14:57,554 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1103 transitions. Word has length 167 [2022-11-03 02:14:57,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:57,554 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1103 transitions. [2022-11-03 02:14:57,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 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 02:14:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1103 transitions. [2022-11-03 02:14:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:14:57,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:57,556 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:14:57,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:57,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-03 02:14:57,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:14:57,960 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:57,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1253837095, now seen corresponding path program 1 times [2022-11-03 02:14:57,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:14:57,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190318845] [2022-11-03 02:14:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:57,961 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:14:57,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:14:57,963 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:14:57,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-03 02:14:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:14:58,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:14:58,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:14:58,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:14:58,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190318845] [2022-11-03 02:14:58,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190318845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945437596] [2022-11-03 02:14:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:58,944 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:14:58,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:14:58,946 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:14:58,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-03 02:14:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 02:14:59,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:14:59,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:15:00,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1945437596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:00,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989752847] [2022-11-03 02:15:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:00,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:00,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:00,034 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:00,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-03 02:15:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:00,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:15:00,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:15:00,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:15:00,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989752847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:00,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:00,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 7, 7] total 25 [2022-11-03 02:15:00,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10457571] [2022-11-03 02:15:00,859 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:00,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 02:15:00,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:00,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 02:15:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:15:00,861 INFO L87 Difference]: Start difference. First operand 780 states and 1103 transitions. Second operand has 25 states, 25 states have (on average 13.84) internal successors, (346), 25 states have internal predecessors, (346), 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 02:15:04,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:04,825 INFO L93 Difference]: Finished difference Result 8696 states and 12508 transitions. [2022-11-03 02:15:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-03 02:15:04,826 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 13.84) internal successors, (346), 25 states have internal predecessors, (346), 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 167 [2022-11-03 02:15:04,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:04,847 INFO L225 Difference]: With dead ends: 8696 [2022-11-03 02:15:04,847 INFO L226 Difference]: Without dead ends: 7946 [2022-11-03 02:15:04,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 969 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2041, Invalid=8671, Unknown=0, NotChecked=0, Total=10712 [2022-11-03 02:15:04,852 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 5448 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5448 SdHoareTripleChecker+Valid, 3703 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:04,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5448 Valid, 3703 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:15:04,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2022-11-03 02:15:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 1208. [2022-11-03 02:15:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 1.4067937033968516) internal successors, (1698), 1207 states have internal predecessors, (1698), 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 02:15:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1698 transitions. [2022-11-03 02:15:04,929 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1698 transitions. Word has length 167 [2022-11-03 02:15:04,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:04,929 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 1698 transitions. [2022-11-03 02:15:04,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.84) internal successors, (346), 25 states have internal predecessors, (346), 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 02:15:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1698 transitions. [2022-11-03 02:15:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:15:04,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:04,932 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:04,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:05,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-03 02:15:05,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:05,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:05,554 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1803751127, now seen corresponding path program 1 times [2022-11-03 02:15:05,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:05,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745827541] [2022-11-03 02:15:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:05,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:05,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:05,556 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:05,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-03 02:15:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:05,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:15:05,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 77 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:06,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:06,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:06,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745827541] [2022-11-03 02:15:06,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745827541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:06,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1199483674] [2022-11-03 02:15:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:06,363 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:06,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:06,370 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:06,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-03 02:15:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:06,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:06,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:15:06,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:06,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1199483674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:06,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:06,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 22 [2022-11-03 02:15:06,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065844866] [2022-11-03 02:15:06,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:06,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:06,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:15:06,862 INFO L87 Difference]: Start difference. First operand 1208 states and 1698 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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 02:15:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:06,984 INFO L93 Difference]: Finished difference Result 4252 states and 6052 transitions. [2022-11-03 02:15:07,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:15:07,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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 167 [2022-11-03 02:15:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:07,025 INFO L225 Difference]: With dead ends: 4252 [2022-11-03 02:15:07,030 INFO L226 Difference]: Without dead ends: 3126 [2022-11-03 02:15:07,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:15:07,033 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 455 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:07,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 517 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:07,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2022-11-03 02:15:07,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 1352. [2022-11-03 02:15:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 1.3989637305699483) internal successors, (1890), 1351 states have internal predecessors, (1890), 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 02:15:07,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1890 transitions. [2022-11-03 02:15:07,074 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1890 transitions. Word has length 167 [2022-11-03 02:15:07,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:07,075 INFO L495 AbstractCegarLoop]: Abstraction has 1352 states and 1890 transitions. [2022-11-03 02:15:07,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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 02:15:07,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1890 transitions. [2022-11-03 02:15:07,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:15:07,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:07,077 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:07,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:07,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:07,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:07,492 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:07,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1788232409, now seen corresponding path program 1 times [2022-11-03 02:15:07,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:07,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127048834] [2022-11-03 02:15:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:07,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:07,494 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:07,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-03 02:15:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:07,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:15:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 77 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:08,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:08,341 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:08,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127048834] [2022-11-03 02:15:08,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127048834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:08,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [403947425] [2022-11-03 02:15:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:08,342 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:08,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:08,343 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:08,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-03 02:15:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:08,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:15:08,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:08,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [403947425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:08,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:08,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 22 [2022-11-03 02:15:08,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570553099] [2022-11-03 02:15:08,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:08,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:08,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:08,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:08,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:15:08,838 INFO L87 Difference]: Start difference. First operand 1352 states and 1890 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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 02:15:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:08,949 INFO L93 Difference]: Finished difference Result 4732 states and 6700 transitions. [2022-11-03 02:15:08,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:15:08,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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 167 [2022-11-03 02:15:08,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:08,955 INFO L225 Difference]: With dead ends: 4732 [2022-11-03 02:15:08,956 INFO L226 Difference]: Without dead ends: 3462 [2022-11-03 02:15:08,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:15:08,959 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 464 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:08,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 511 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2022-11-03 02:15:09,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 1688. [2022-11-03 02:15:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 1.4048606994665085) internal successors, (2370), 1687 states have internal predecessors, (2370), 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 02:15:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2370 transitions. [2022-11-03 02:15:09,008 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2370 transitions. Word has length 167 [2022-11-03 02:15:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:09,009 INFO L495 AbstractCegarLoop]: Abstraction has 1688 states and 2370 transitions. [2022-11-03 02:15:09,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 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 02:15:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2370 transitions. [2022-11-03 02:15:09,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:15:09,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:09,012 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:09,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-03 02:15:09,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-03 02:15:09,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:09,415 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:09,415 INFO L85 PathProgramCache]: Analyzing trace with hash 944226907, now seen corresponding path program 1 times [2022-11-03 02:15:09,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:09,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687469596] [2022-11-03 02:15:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:09,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:09,417 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:09,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-03 02:15:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:09,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:15:09,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 77 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:09,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:10,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:10,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687469596] [2022-11-03 02:15:10,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687469596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:10,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [120393863] [2022-11-03 02:15:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:10,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:10,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:10,207 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:10,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-03 02:15:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:10,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:15:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 77 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:10,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:11,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [120393863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:11,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559496639] [2022-11-03 02:15:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:11,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:11,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:11,066 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:11,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-03 02:15:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:15:11,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 77 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:11,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:11,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559496639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:11,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:11,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 19 [2022-11-03 02:15:11,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672150093] [2022-11-03 02:15:11,671 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:11,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:15:11,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:11,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:15:11,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:15:11,675 INFO L87 Difference]: Start difference. First operand 1688 states and 2370 transitions. Second operand has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 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 02:15:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:12,791 INFO L93 Difference]: Finished difference Result 12404 states and 17436 transitions. [2022-11-03 02:15:12,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 02:15:12,791 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 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 167 [2022-11-03 02:15:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:12,801 INFO L225 Difference]: With dead ends: 12404 [2022-11-03 02:15:12,801 INFO L226 Difference]: Without dead ends: 10798 [2022-11-03 02:15:12,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1019 GetRequests, 979 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:15:12,805 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 2000 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2000 SdHoareTripleChecker+Valid, 3153 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:12,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2000 Valid, 3153 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:15:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10798 states. [2022-11-03 02:15:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10798 to 3338. [2022-11-03 02:15:12,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.4054540005993408) internal successors, (4690), 3337 states have internal predecessors, (4690), 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 02:15:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 4690 transitions. [2022-11-03 02:15:12,923 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 4690 transitions. Word has length 167 [2022-11-03 02:15:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:12,923 INFO L495 AbstractCegarLoop]: Abstraction has 3338 states and 4690 transitions. [2022-11-03 02:15:12,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.789473684210526) internal successors, (205), 19 states have internal predecessors, (205), 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 02:15:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 4690 transitions. [2022-11-03 02:15:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:15:12,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:12,928 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:12,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:13,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-11-03 02:15:13,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:13,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:13,544 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:13,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:13,544 INFO L85 PathProgramCache]: Analyzing trace with hash 971292509, now seen corresponding path program 1 times [2022-11-03 02:15:13,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:13,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228883658] [2022-11-03 02:15:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:13,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:13,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:13,546 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:13,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-03 02:15:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:15:13,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 75 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:14,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 84 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:14,339 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:14,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228883658] [2022-11-03 02:15:14,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228883658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:14,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [544221810] [2022-11-03 02:15:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:14,339 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:14,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:14,342 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:14,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-03 02:15:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:14,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:14,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:15:14,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:14,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [544221810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:14,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:14,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 20 [2022-11-03 02:15:14,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74565635] [2022-11-03 02:15:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:14,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:14,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:14,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:14,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:15:14,761 INFO L87 Difference]: Start difference. First operand 3338 states and 4690 transitions. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 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 02:15:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:14,872 INFO L93 Difference]: Finished difference Result 6486 states and 9165 transitions. [2022-11-03 02:15:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:15:14,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 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 167 [2022-11-03 02:15:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:14,880 INFO L225 Difference]: With dead ends: 6486 [2022-11-03 02:15:14,880 INFO L226 Difference]: Without dead ends: 4880 [2022-11-03 02:15:14,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:15:14,883 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 558 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:14,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 479 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2022-11-03 02:15:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 2556. [2022-11-03 02:15:14,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2555 states have (on average 1.3964774951076322) internal successors, (3568), 2555 states have internal predecessors, (3568), 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 02:15:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 3568 transitions. [2022-11-03 02:15:14,952 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 3568 transitions. Word has length 167 [2022-11-03 02:15:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:14,952 INFO L495 AbstractCegarLoop]: Abstraction has 2556 states and 3568 transitions. [2022-11-03 02:15:14,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 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 02:15:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 3568 transitions. [2022-11-03 02:15:14,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:15:14,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:14,956 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:14,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-11-03 02:15:15,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-03 02:15:15,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:15,360 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:15,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1233046297, now seen corresponding path program 1 times [2022-11-03 02:15:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:15,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77061624] [2022-11-03 02:15:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:15,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:15,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:15,362 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:15,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-03 02:15:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:15,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:15:15,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:15:15,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:15,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:15,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77061624] [2022-11-03 02:15:15,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77061624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:15,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:15:15,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:15:15,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865085183] [2022-11-03 02:15:15,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:15,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:15,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:15:15,750 INFO L87 Difference]: Start difference. First operand 2556 states and 3568 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 02:15:15,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:15,854 INFO L93 Difference]: Finished difference Result 4363 states and 6107 transitions. [2022-11-03 02:15:15,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:15:15,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 167 [2022-11-03 02:15:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:15,859 INFO L225 Difference]: With dead ends: 4363 [2022-11-03 02:15:15,860 INFO L226 Difference]: Without dead ends: 2691 [2022-11-03 02:15:15,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 163 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 02:15:15,862 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 244 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:15,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 483 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-11-03 02:15:15,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2510. [2022-11-03 02:15:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2509 states have (on average 1.40175368672778) internal successors, (3517), 2509 states have internal predecessors, (3517), 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 02:15:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 3517 transitions. [2022-11-03 02:15:15,915 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 3517 transitions. Word has length 167 [2022-11-03 02:15:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:15,915 INFO L495 AbstractCegarLoop]: Abstraction has 2510 states and 3517 transitions. [2022-11-03 02:15:15,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 02:15:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 3517 transitions. [2022-11-03 02:15:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 02:15:15,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:15,920 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 02:15:15,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:16,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:16,135 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:16,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1705401595, now seen corresponding path program 1 times [2022-11-03 02:15:16,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:16,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143347563] [2022-11-03 02:15:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:16,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:16,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:16,138 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-03 02:15:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:16,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:15:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:15:16,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 179 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:15:17,020 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:17,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143347563] [2022-11-03 02:15:17,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143347563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:17,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1444652209] [2022-11-03 02:15:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:17,021 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:17,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:17,022 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:17,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-03 02:15:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-03 02:15:17,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:17,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1444652209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:17,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:17,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 20 [2022-11-03 02:15:17,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449527319] [2022-11-03 02:15:17,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:17,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:17,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:17,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:15:17,574 INFO L87 Difference]: Start difference. First operand 2510 states and 3517 transitions. Second operand has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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 02:15:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:17,689 INFO L93 Difference]: Finished difference Result 8104 states and 11431 transitions. [2022-11-03 02:15:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:15:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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 248 [2022-11-03 02:15:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:17,696 INFO L225 Difference]: With dead ends: 8104 [2022-11-03 02:15:17,696 INFO L226 Difference]: Without dead ends: 5676 [2022-11-03 02:15:17,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:15:17,700 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 557 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:17,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 478 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2022-11-03 02:15:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 2542. [2022-11-03 02:15:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 2541 states have (on average 1.397874852420307) internal successors, (3552), 2541 states have internal predecessors, (3552), 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 02:15:17,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 3552 transitions. [2022-11-03 02:15:17,768 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 3552 transitions. Word has length 248 [2022-11-03 02:15:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:17,769 INFO L495 AbstractCegarLoop]: Abstraction has 2542 states and 3552 transitions. [2022-11-03 02:15:17,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.0) internal successors, (175), 5 states have internal predecessors, (175), 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 02:15:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 3552 transitions. [2022-11-03 02:15:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 02:15:17,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:17,774 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 02:15:17,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:17,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-03 02:15:18,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:18,179 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash 188932291, now seen corresponding path program 2 times [2022-11-03 02:15:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:18,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512509863] [2022-11-03 02:15:18,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:15:18,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:18,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:18,181 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:18,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-03 02:15:18,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:15:18,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:15:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:15:18,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 02:15:18,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 181 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 02:15:19,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512509863] [2022-11-03 02:15:19,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512509863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [271402924] [2022-11-03 02:15:19,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:15:19,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:19,056 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:19,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-03 02:15:19,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:15:19,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:15:19,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-03 02:15:19,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:19,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [271402924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:19,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:19,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 12] total 20 [2022-11-03 02:15:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096845814] [2022-11-03 02:15:19,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:19,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:19,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:19,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:19,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:15:19,625 INFO L87 Difference]: Start difference. First operand 2542 states and 3552 transitions. Second operand has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 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 02:15:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:19,760 INFO L93 Difference]: Finished difference Result 6734 states and 9477 transitions. [2022-11-03 02:15:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:15:19,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 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 248 [2022-11-03 02:15:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:19,765 INFO L225 Difference]: With dead ends: 6734 [2022-11-03 02:15:19,765 INFO L226 Difference]: Without dead ends: 5120 [2022-11-03 02:15:19,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:15:19,769 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 555 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:19,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 477 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:19,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5120 states. [2022-11-03 02:15:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5120 to 2554. [2022-11-03 02:15:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 1.3948296122209165) internal successors, (3561), 2553 states have internal predecessors, (3561), 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 02:15:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 3561 transitions. [2022-11-03 02:15:19,834 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 3561 transitions. Word has length 248 [2022-11-03 02:15:19,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:19,835 INFO L495 AbstractCegarLoop]: Abstraction has 2554 states and 3561 transitions. [2022-11-03 02:15:19,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.4) internal successors, (177), 5 states have internal predecessors, (177), 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 02:15:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 3561 transitions. [2022-11-03 02:15:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 02:15:19,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:19,839 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 02:15:19,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:20,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-03 02:15:20,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:20,244 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash -734235135, now seen corresponding path program 3 times [2022-11-03 02:15:20,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:20,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397071635] [2022-11-03 02:15:20,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:15:20,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:20,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:20,246 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:20,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-03 02:15:20,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:15:20,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:15:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:15:20,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 02:15:21,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 02:15:25,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:25,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397071635] [2022-11-03 02:15:25,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397071635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:25,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [848594887] [2022-11-03 02:15:25,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:15:25,499 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:25,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:25,506 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:25,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-03 02:15:25,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:15:25,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:15:25,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:15:25,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 02:15:27,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 02:15:29,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [848594887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:29,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377104118] [2022-11-03 02:15:29,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:15:29,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:29,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:29,660 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:29,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-03 02:15:29,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:15:29,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:15:29,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:15:29,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 02:15:31,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-03 02:15:34,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377104118] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:34,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:34,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 15, 15] total 28 [2022-11-03 02:15:34,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330432296] [2022-11-03 02:15:34,069 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:34,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:15:34,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:34,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:15:34,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:15:34,071 INFO L87 Difference]: Start difference. First operand 2554 states and 3561 transitions. Second operand has 28 states, 28 states have (on average 13.071428571428571) internal successors, (366), 28 states have internal predecessors, (366), 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 02:15:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:36,843 INFO L93 Difference]: Finished difference Result 8998 states and 12698 transitions. [2022-11-03 02:15:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-03 02:15:36,844 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 13.071428571428571) internal successors, (366), 28 states have internal predecessors, (366), 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 248 [2022-11-03 02:15:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:36,849 INFO L225 Difference]: With dead ends: 8998 [2022-11-03 02:15:36,850 INFO L226 Difference]: Without dead ends: 8996 [2022-11-03 02:15:36,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1454 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1210, Invalid=4340, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:15:36,852 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 2680 mSDsluCounter, 7078 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2680 SdHoareTripleChecker+Valid, 7548 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 713 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:36,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2680 Valid, 7548 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 667 Invalid, 0 Unknown, 713 Unchecked, 0.7s Time] [2022-11-03 02:15:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8996 states. [2022-11-03 02:15:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8996 to 2820. [2022-11-03 02:15:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2820 states, 2819 states have (on average 1.3976587442355446) internal successors, (3940), 2819 states have internal predecessors, (3940), 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 02:15:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 3940 transitions. [2022-11-03 02:15:36,932 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 3940 transitions. Word has length 248 [2022-11-03 02:15:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:36,933 INFO L495 AbstractCegarLoop]: Abstraction has 2820 states and 3940 transitions. [2022-11-03 02:15:36,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 13.071428571428571) internal successors, (366), 28 states have internal predecessors, (366), 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 02:15:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 3940 transitions. [2022-11-03 02:15:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 02:15:36,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:36,938 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:36,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:37,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-11-03 02:15:37,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-11-03 02:15:37,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:37,552 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:37,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1226861309, now seen corresponding path program 1 times [2022-11-03 02:15:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:37,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427416974] [2022-11-03 02:15:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:37,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:37,555 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:37,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-03 02:15:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:37,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:37,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:15:38,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 191 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:15:38,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:38,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427416974] [2022-11-03 02:15:38,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427416974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:38,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [827827992] [2022-11-03 02:15:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:38,402 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:38,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:38,403 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:38,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-03 02:15:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:38,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 02:15:38,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:38,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [827827992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:38,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:38,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 02:15:38,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374313154] [2022-11-03 02:15:38,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:38,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:38,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:38,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:38,966 INFO L87 Difference]: Start difference. First operand 2820 states and 3940 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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 02:15:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:39,077 INFO L93 Difference]: Finished difference Result 5569 states and 7812 transitions. [2022-11-03 02:15:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:15:39,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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 248 [2022-11-03 02:15:39,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:39,081 INFO L225 Difference]: With dead ends: 5569 [2022-11-03 02:15:39,081 INFO L226 Difference]: Without dead ends: 3633 [2022-11-03 02:15:39,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:15:39,084 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 339 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:39,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 497 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2022-11-03 02:15:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 2526. [2022-11-03 02:15:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 1.3936633663366336) internal successors, (3519), 2525 states have internal predecessors, (3519), 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 02:15:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 3519 transitions. [2022-11-03 02:15:39,140 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 3519 transitions. Word has length 248 [2022-11-03 02:15:39,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:39,140 INFO L495 AbstractCegarLoop]: Abstraction has 2526 states and 3519 transitions. [2022-11-03 02:15:39,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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 02:15:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 3519 transitions. [2022-11-03 02:15:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 02:15:39,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:39,145 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:39,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:39,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:39,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:39,560 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:39,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:39,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1701585789, now seen corresponding path program 1 times [2022-11-03 02:15:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:39,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584730591] [2022-11-03 02:15:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:39,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:39,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:39,563 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:39,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-03 02:15:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:39,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:15:40,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 191 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:15:40,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:40,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584730591] [2022-11-03 02:15:40,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584730591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:40,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2026762427] [2022-11-03 02:15:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:40,398 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:40,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:40,399 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:40,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-03 02:15:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:40,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 02:15:40,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:40,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2026762427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:40,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:40,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-03 02:15:40,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75533349] [2022-11-03 02:15:40,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:40,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:40,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:40,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:40,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:15:40,987 INFO L87 Difference]: Start difference. First operand 2526 states and 3519 transitions. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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 02:15:41,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:41,109 INFO L93 Difference]: Finished difference Result 4965 states and 6952 transitions. [2022-11-03 02:15:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:15:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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 248 [2022-11-03 02:15:41,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:41,113 INFO L225 Difference]: With dead ends: 4965 [2022-11-03 02:15:41,113 INFO L226 Difference]: Without dead ends: 3601 [2022-11-03 02:15:41,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 732 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:15:41,116 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 337 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:41,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 491 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:41,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3601 states. [2022-11-03 02:15:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3601 to 2526. [2022-11-03 02:15:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 1.3916831683168316) internal successors, (3514), 2525 states have internal predecessors, (3514), 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 02:15:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 3514 transitions. [2022-11-03 02:15:41,170 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 3514 transitions. Word has length 248 [2022-11-03 02:15:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:41,170 INFO L495 AbstractCegarLoop]: Abstraction has 2526 states and 3514 transitions. [2022-11-03 02:15:41,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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 02:15:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 3514 transitions. [2022-11-03 02:15:41,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 02:15:41,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:41,177 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:41,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-03 02:15:41,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:41,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:41,594 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash 936567677, now seen corresponding path program 1 times [2022-11-03 02:15:41,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:41,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569984414] [2022-11-03 02:15:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:41,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:41,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:41,597 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:41,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-03 02:15:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:41,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:15:42,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 191 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:15:42,431 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:42,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569984414] [2022-11-03 02:15:42,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569984414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:42,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [367316281] [2022-11-03 02:15:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:42,432 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:42,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:42,435 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:42,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-03 02:15:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:43,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:43,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:15:43,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 191 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-03 02:15:43,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [367316281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:43,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166990665] [2022-11-03 02:15:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:43,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:43,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:43,662 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:43,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-03 02:15:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:43,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:15:43,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 108 proven. 116 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:15:44,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 108 proven. 116 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:15:45,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166990665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:45,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:45,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 12, 12] total 31 [2022-11-03 02:15:45,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655815620] [2022-11-03 02:15:45,226 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:45,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-03 02:15:45,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:45,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-03 02:15:45,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:15:45,228 INFO L87 Difference]: Start difference. First operand 2526 states and 3514 transitions. Second operand has 31 states, 31 states have (on average 19.258064516129032) internal successors, (597), 31 states have internal predecessors, (597), 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 02:15:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:49,256 INFO L93 Difference]: Finished difference Result 24562 states and 33898 transitions. [2022-11-03 02:15:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-03 02:15:49,257 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 19.258064516129032) internal successors, (597), 31 states have internal predecessors, (597), 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 248 [2022-11-03 02:15:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:49,270 INFO L225 Difference]: With dead ends: 24562 [2022-11-03 02:15:49,270 INFO L226 Difference]: Without dead ends: 21974 [2022-11-03 02:15:49,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1538 GetRequests, 1453 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1000, Invalid=6482, Unknown=0, NotChecked=0, Total=7482 [2022-11-03 02:15:49,277 INFO L413 NwaCegarLoop]: 659 mSDtfsCounter, 4327 mSDsluCounter, 11113 mSDsCounter, 0 mSdLazyCounter, 2681 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4327 SdHoareTripleChecker+Valid, 11772 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:49,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4327 Valid, 11772 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2681 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:15:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21974 states. [2022-11-03 02:15:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21974 to 6762. [2022-11-03 02:15:49,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6762 states, 6761 states have (on average 1.373169649460139) internal successors, (9284), 6761 states have internal predecessors, (9284), 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 02:15:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 9284 transitions. [2022-11-03 02:15:49,524 INFO L78 Accepts]: Start accepts. Automaton has 6762 states and 9284 transitions. Word has length 248 [2022-11-03 02:15:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:49,525 INFO L495 AbstractCegarLoop]: Abstraction has 6762 states and 9284 transitions. [2022-11-03 02:15:49,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 19.258064516129032) internal successors, (597), 31 states have internal predecessors, (597), 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 02:15:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6762 states and 9284 transitions. [2022-11-03 02:15:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 02:15:49,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:49,533 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:49,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:49,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2022-11-03 02:15:49,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-03 02:15:50,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:50,150 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1907877821, now seen corresponding path program 1 times [2022-11-03 02:15:50,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:50,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842115269] [2022-11-03 02:15:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:50,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:50,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:50,153 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:50,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-03 02:15:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:50,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:15:50,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 32 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 02:15:50,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 197 proven. 1 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-03 02:15:50,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:50,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842115269] [2022-11-03 02:15:50,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842115269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:50,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1268484383] [2022-11-03 02:15:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:50,990 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:50,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:50,994 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:51,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-03 02:15:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:51,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:15:51,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:51,542 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-11-03 02:15:51,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:51,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1268484383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:51,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:15:51,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 12 [2022-11-03 02:15:51,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199139849] [2022-11-03 02:15:51,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:51,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:15:51,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:15:51,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:15:51,544 INFO L87 Difference]: Start difference. First operand 6762 states and 9284 transitions. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 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 02:15:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:51,717 INFO L93 Difference]: Finished difference Result 16202 states and 22243 transitions. [2022-11-03 02:15:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:15:51,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 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 248 [2022-11-03 02:15:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:51,725 INFO L225 Difference]: With dead ends: 16202 [2022-11-03 02:15:51,725 INFO L226 Difference]: Without dead ends: 11712 [2022-11-03 02:15:51,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 734 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:15:51,728 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 476 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:51,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 519 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:15:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11712 states. [2022-11-03 02:15:51,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11712 to 7122. [2022-11-03 02:15:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7122 states, 7121 states have (on average 1.3492487010251368) internal successors, (9608), 7121 states have internal predecessors, (9608), 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 02:15:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7122 states to 7122 states and 9608 transitions. [2022-11-03 02:15:51,899 INFO L78 Accepts]: Start accepts. Automaton has 7122 states and 9608 transitions. Word has length 248 [2022-11-03 02:15:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:51,899 INFO L495 AbstractCegarLoop]: Abstraction has 7122 states and 9608 transitions. [2022-11-03 02:15:51,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 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 02:15:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 7122 states and 9608 transitions. [2022-11-03 02:15:51,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 02:15:51,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:51,908 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:15:51,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:52,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:52,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:15:52,312 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:52,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1023157435, now seen corresponding path program 1 times [2022-11-03 02:15:52,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:15:52,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268439580] [2022-11-03 02:15:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:52,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:15:52,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:15:52,314 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:15:52,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-03 02:15:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:52,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:15:52,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 34 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:15:53,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 34 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-03 02:15:53,568 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:15:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268439580] [2022-11-03 02:15:53,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268439580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:53,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1016635225] [2022-11-03 02:15:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:53,569 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:15:53,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:15:53,572 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:15:53,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2022-11-03 02:15:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:54,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:15:54,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 02:15:54,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 207 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-03 02:15:55,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1016635225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:55,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075901142] [2022-11-03 02:15:55,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:55,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:55,278 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:55,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-11-03 02:15:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:55,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:15:55,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 168 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:15:55,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 166 proven. 5 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:15:56,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075901142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:56,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:15:56,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11, 11, 7, 7] total 42 [2022-11-03 02:15:56,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546501084] [2022-11-03 02:15:56,027 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:56,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-03 02:15:56,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:15:56,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-03 02:15:56,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:15:56,030 INFO L87 Difference]: Start difference. First operand 7122 states and 9608 transitions. Second operand has 42 states, 42 states have (on average 14.047619047619047) internal successors, (590), 42 states have internal predecessors, (590), 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 02:16:18,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:18,415 INFO L93 Difference]: Finished difference Result 115244 states and 153342 transitions. [2022-11-03 02:16:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 339 states. [2022-11-03 02:16:18,416 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 14.047619047619047) internal successors, (590), 42 states have internal predecessors, (590), 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 248 [2022-11-03 02:16:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:18,488 INFO L225 Difference]: With dead ends: 115244 [2022-11-03 02:16:18,488 INFO L226 Difference]: Without dead ends: 108204 [2022-11-03 02:16:18,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1818 GetRequests, 1440 SyntacticMatches, 2 SemanticMatches, 376 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61943 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=20842, Invalid=121664, Unknown=0, NotChecked=0, Total=142506 [2022-11-03 02:16:18,510 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 15711 mSDsluCounter, 7153 mSDsCounter, 0 mSdLazyCounter, 2324 mSolverCounterSat, 1020 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15711 SdHoareTripleChecker+Valid, 7360 SdHoareTripleChecker+Invalid, 3344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1020 IncrementalHoareTripleChecker+Valid, 2324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:18,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15711 Valid, 7360 Invalid, 3344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1020 Valid, 2324 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:16:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108204 states. [2022-11-03 02:16:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108204 to 21048. [2022-11-03 02:16:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21048 states, 21047 states have (on average 1.3116833753028936) internal successors, (27607), 21047 states have internal predecessors, (27607), 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 02:16:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21048 states to 21048 states and 27607 transitions. [2022-11-03 02:16:19,783 INFO L78 Accepts]: Start accepts. Automaton has 21048 states and 27607 transitions. Word has length 248 [2022-11-03 02:16:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:19,783 INFO L495 AbstractCegarLoop]: Abstraction has 21048 states and 27607 transitions. [2022-11-03 02:16:19,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 14.047619047619047) internal successors, (590), 42 states have internal predecessors, (590), 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 02:16:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 21048 states and 27607 transitions. [2022-11-03 02:16:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:16:19,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:19,817 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 02:16:19,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:20,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-11-03 02:16:20,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:20,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:20,424 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:20,425 INFO L85 PathProgramCache]: Analyzing trace with hash 966534819, now seen corresponding path program 1 times [2022-11-03 02:16:20,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:20,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851117005] [2022-11-03 02:16:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:20,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:20,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:20,426 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:20,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-03 02:16:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:20,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:16:20,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:16:21,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:16:21,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:21,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851117005] [2022-11-03 02:16:21,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851117005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:21,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1476164607] [2022-11-03 02:16:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:21,710 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:21,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:16:21,711 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:16:21,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-03 02:16:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:22,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:16:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-03 02:16:22,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:22,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1476164607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:22,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:16:22,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 02:16:22,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947749280] [2022-11-03 02:16:22,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:22,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:16:22,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:22,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:16:22,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:16:22,509 INFO L87 Difference]: Start difference. First operand 21048 states and 27607 transitions. Second operand has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 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 02:16:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:22,914 INFO L93 Difference]: Finished difference Result 56638 states and 74590 transitions. [2022-11-03 02:16:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:16:22,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 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 329 [2022-11-03 02:16:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:22,939 INFO L225 Difference]: With dead ends: 56638 [2022-11-03 02:16:22,939 INFO L226 Difference]: Without dead ends: 35672 [2022-11-03 02:16:22,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:16:22,954 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 390 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:22,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 551 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35672 states. [2022-11-03 02:16:23,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35672 to 22056. [2022-11-03 02:16:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22056 states, 22055 states have (on average 1.297438222625255) internal successors, (28615), 22055 states have internal predecessors, (28615), 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 02:16:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22056 states to 22056 states and 28615 transitions. [2022-11-03 02:16:23,414 INFO L78 Accepts]: Start accepts. Automaton has 22056 states and 28615 transitions. Word has length 329 [2022-11-03 02:16:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:23,415 INFO L495 AbstractCegarLoop]: Abstraction has 22056 states and 28615 transitions. [2022-11-03 02:16:23,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.2) internal successors, (186), 5 states have internal predecessors, (186), 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 02:16:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 22056 states and 28615 transitions. [2022-11-03 02:16:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:16:23,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:23,434 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 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 02:16:23,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-03 02:16:23,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:23,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:23,835 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:23,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1001270107, now seen corresponding path program 2 times [2022-11-03 02:16:23,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:23,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775054628] [2022-11-03 02:16:23,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:16:23,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:23,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:23,837 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:23,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-03 02:16:24,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:16:24,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:16:24,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:16:24,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:16:25,152 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:25,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775054628] [2022-11-03 02:16:25,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775054628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:25,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2032765689] [2022-11-03 02:16:25,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:16:25,153 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:25,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:16:25,154 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:16:25,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-03 02:16:25,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:16:25,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:16:25,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-11-03 02:16:25,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:25,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2032765689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:25,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:16:25,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 02:16:25,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997690281] [2022-11-03 02:16:25,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:25,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:16:25,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:16:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:16:25,895 INFO L87 Difference]: Start difference. First operand 22056 states and 28615 transitions. Second operand has 5 states, 5 states have (on average 37.6) internal successors, (188), 5 states have internal predecessors, (188), 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 02:16:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:26,299 INFO L93 Difference]: Finished difference Result 58150 states and 75598 transitions. [2022-11-03 02:16:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:16:26,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.6) internal successors, (188), 5 states have internal predecessors, (188), 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 329 [2022-11-03 02:16:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:26,323 INFO L225 Difference]: With dead ends: 58150 [2022-11-03 02:16:26,323 INFO L226 Difference]: Without dead ends: 36176 [2022-11-03 02:16:26,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:16:26,336 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 388 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:26,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 550 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36176 states. [2022-11-03 02:16:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36176 to 22560. [2022-11-03 02:16:26,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22560 states, 22559 states have (on average 1.2796223236845605) internal successors, (28867), 22559 states have internal predecessors, (28867), 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 02:16:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22560 states to 22560 states and 28867 transitions. [2022-11-03 02:16:26,950 INFO L78 Accepts]: Start accepts. Automaton has 22560 states and 28867 transitions. Word has length 329 [2022-11-03 02:16:26,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:26,950 INFO L495 AbstractCegarLoop]: Abstraction has 22560 states and 28867 transitions. [2022-11-03 02:16:26,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.6) internal successors, (188), 5 states have internal predecessors, (188), 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 02:16:26,950 INFO L276 IsEmpty]: Start isEmpty. Operand 22560 states and 28867 transitions. [2022-11-03 02:16:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:16:26,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:26,972 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 02:16:26,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-03 02:16:27,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:27,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:27,374 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:27,374 INFO L85 PathProgramCache]: Analyzing trace with hash -717284569, now seen corresponding path program 3 times [2022-11-03 02:16:27,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:27,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437260606] [2022-11-03 02:16:27,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:16:27,376 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:27,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:27,377 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:27,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-03 02:16:27,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:16:27,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:27,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:16:27,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 233 proven. 9 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-03 02:16:28,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 233 proven. 9 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-03 02:16:28,913 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:28,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437260606] [2022-11-03 02:16:28,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437260606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:28,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [277798102] [2022-11-03 02:16:28,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:16:28,914 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:28,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:16:28,916 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:16:28,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-03 02:16:29,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:16:29,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:29,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:16:29,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 233 proven. 9 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-03 02:16:30,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 233 proven. 9 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-03 02:16:30,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [277798102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:30,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737909483] [2022-11-03 02:16:30,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:16:30,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:30,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:30,657 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:30,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-03 02:16:30,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:16:30,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:30,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:16:30,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 233 proven. 9 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-03 02:16:31,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 233 proven. 9 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-03 02:16:32,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737909483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:32,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:16:32,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 9 [2022-11-03 02:16:32,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749052476] [2022-11-03 02:16:32,481 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:16:32,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:16:32,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:16:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:16:32,483 INFO L87 Difference]: Start difference. First operand 22560 states and 28867 transitions. Second operand has 9 states, 9 states have (on average 33.333333333333336) internal successors, (300), 9 states have internal predecessors, (300), 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 02:16:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:33,058 INFO L93 Difference]: Finished difference Result 47204 states and 60419 transitions. [2022-11-03 02:16:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:16:33,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 33.333333333333336) internal successors, (300), 9 states have internal predecessors, (300), 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 329 [2022-11-03 02:16:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:33,077 INFO L225 Difference]: With dead ends: 47204 [2022-11-03 02:16:33,077 INFO L226 Difference]: Without dead ends: 29854 [2022-11-03 02:16:33,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1972 GetRequests, 1961 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:16:33,082 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 305 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:33,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 682 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:16:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29854 states. [2022-11-03 02:16:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29854 to 22260. [2022-11-03 02:16:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22260 states, 22259 states have (on average 1.2779999101487038) internal successors, (28447), 22259 states have internal predecessors, (28447), 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 02:16:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22260 states to 22260 states and 28447 transitions. [2022-11-03 02:16:33,412 INFO L78 Accepts]: Start accepts. Automaton has 22260 states and 28447 transitions. Word has length 329 [2022-11-03 02:16:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:33,412 INFO L495 AbstractCegarLoop]: Abstraction has 22260 states and 28447 transitions. [2022-11-03 02:16:33,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.333333333333336) internal successors, (300), 9 states have internal predecessors, (300), 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 02:16:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 22260 states and 28447 transitions. [2022-11-03 02:16:33,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:16:33,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:33,431 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 02:16:33,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (84)] Ended with exit code 0 [2022-11-03 02:16:33,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-11-03 02:16:33,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-03 02:16:34,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:34,035 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1550641711, now seen corresponding path program 4 times [2022-11-03 02:16:34,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:34,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579573157] [2022-11-03 02:16:34,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:16:34,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:34,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:34,037 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:34,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-03 02:16:34,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:16:34,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:34,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:16:34,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:16:34,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:16:35,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:35,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579573157] [2022-11-03 02:16:35,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579573157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:35,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1209174665] [2022-11-03 02:16:35,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:16:35,322 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:35,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:16:35,323 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:16:35,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-03 02:16:35,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:16:35,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:35,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:16:35,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-03 02:16:36,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:36,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1209174665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:36,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:16:36,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 02:16:36,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823681621] [2022-11-03 02:16:36,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:36,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:16:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:36,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:16:36,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:16:36,064 INFO L87 Difference]: Start difference. First operand 22260 states and 28447 transitions. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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 02:16:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:36,525 INFO L93 Difference]: Finished difference Result 59992 states and 77048 transitions. [2022-11-03 02:16:36,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:16:36,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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 329 [2022-11-03 02:16:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:36,550 INFO L225 Difference]: With dead ends: 59992 [2022-11-03 02:16:36,550 INFO L226 Difference]: Without dead ends: 37814 [2022-11-03 02:16:36,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:16:36,564 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 397 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:36,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 547 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37814 states. [2022-11-03 02:16:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37814 to 23904. [2022-11-03 02:16:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23904 states, 23903 states have (on average 1.2761159687068568) internal successors, (30503), 23903 states have internal predecessors, (30503), 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 02:16:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23904 states to 23904 states and 30503 transitions. [2022-11-03 02:16:36,945 INFO L78 Accepts]: Start accepts. Automaton has 23904 states and 30503 transitions. Word has length 329 [2022-11-03 02:16:36,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:36,945 INFO L495 AbstractCegarLoop]: Abstraction has 23904 states and 30503 transitions. [2022-11-03 02:16:36,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 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 02:16:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 23904 states and 30503 transitions. [2022-11-03 02:16:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:16:36,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:36,966 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:36,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (87)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:37,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:37,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:37,370 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash -986698447, now seen corresponding path program 5 times [2022-11-03 02:16:37,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:37,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818767924] [2022-11-03 02:16:37,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:16:37,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:37,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:37,373 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:37,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-03 02:16:37,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:16:37,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:37,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:16:37,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 354 proven. 9 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-03 02:16:37,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 354 proven. 9 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-03 02:16:38,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818767924] [2022-11-03 02:16:38,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818767924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [247003845] [2022-11-03 02:16:38,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:16:38,083 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:16:38,084 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:16:38,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-03 02:16:38,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:16:38,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:16:38,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-03 02:16:38,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:16:38,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [247003845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:38,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:16:38,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9] total 16 [2022-11-03 02:16:38,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248678692] [2022-11-03 02:16:38,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:38,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:16:38,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:16:38,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:16:38,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:16:38,762 INFO L87 Difference]: Start difference. First operand 23904 states and 30503 transitions. Second operand has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 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 02:16:39,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:39,365 INFO L93 Difference]: Finished difference Result 64984 states and 83336 transitions. [2022-11-03 02:16:39,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:16:39,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 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 329 [2022-11-03 02:16:39,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:39,391 INFO L225 Difference]: With dead ends: 64984 [2022-11-03 02:16:39,391 INFO L226 Difference]: Without dead ends: 41162 [2022-11-03 02:16:39,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 973 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:16:39,408 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 370 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:39,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 560 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:16:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41162 states. [2022-11-03 02:16:39,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41162 to 25608. [2022-11-03 02:16:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25608 states, 25607 states have (on average 1.2750029288866325) internal successors, (32649), 25607 states have internal predecessors, (32649), 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 02:16:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25608 states to 25608 states and 32649 transitions. [2022-11-03 02:16:39,826 INFO L78 Accepts]: Start accepts. Automaton has 25608 states and 32649 transitions. Word has length 329 [2022-11-03 02:16:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:39,826 INFO L495 AbstractCegarLoop]: Abstraction has 25608 states and 32649 transitions. [2022-11-03 02:16:39,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.4) internal successors, (202), 5 states have internal predecessors, (202), 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 02:16:39,826 INFO L276 IsEmpty]: Start isEmpty. Operand 25608 states and 32649 transitions. [2022-11-03 02:16:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:16:39,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:39,844 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:16:39,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (89)] Ended with exit code 0 [2022-11-03 02:16:40,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-03 02:16:40,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:16:40,245 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:40,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1802745677, now seen corresponding path program 6 times [2022-11-03 02:16:40,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:16:40,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881096019] [2022-11-03 02:16:40,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:16:40,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:16:40,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:16:40,248 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:16:40,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-03 02:16:40,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-03 02:16:40,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:40,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:16:40,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 232 proven. 4 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-03 02:16:42,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-03 02:16:47,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:16:47,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881096019] [2022-11-03 02:16:47,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881096019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:47,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1223946775] [2022-11-03 02:16:47,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:16:47,401 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:16:47,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:16:47,401 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:16:47,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-03 02:16:47,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-03 02:16:47,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:48,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:16:48,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 232 proven. 4 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-03 02:16:49,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-03 02:16:54,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1223946775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:54,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861178790] [2022-11-03 02:16:54,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:16:54,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:54,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:54,267 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:54,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-03 02:16:54,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-03 02:16:54,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:16:54,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-03 02:16:54,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 232 proven. 4 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-03 02:16:56,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 236 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-03 02:17:00,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861178790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:00,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:17:00,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 26 [2022-11-03 02:17:00,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470846399] [2022-11-03 02:17:00,796 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:00,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:17:00,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:00,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:17:00,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:17:00,798 INFO L87 Difference]: Start difference. First operand 25608 states and 32649 transitions. Second operand has 26 states, 26 states have (on average 14.384615384615385) internal successors, (374), 26 states have internal predecessors, (374), 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 02:17:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:02,008 INFO L93 Difference]: Finished difference Result 65036 states and 83101 transitions. [2022-11-03 02:17:02,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:17:02,009 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 14.384615384615385) internal successors, (374), 26 states have internal predecessors, (374), 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 329 [2022-11-03 02:17:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:02,053 INFO L225 Difference]: With dead ends: 65036 [2022-11-03 02:17:02,053 INFO L226 Difference]: Without dead ends: 65034 [2022-11-03 02:17:02,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1979 GetRequests, 1940 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:17:02,066 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 822 mSDsluCounter, 4098 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 4383 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 553 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:02,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 4383 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 553 Unchecked, 0.1s Time] [2022-11-03 02:17:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65034 states. [2022-11-03 02:17:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65034 to 41854. [2022-11-03 02:17:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41854 states, 41853 states have (on average 1.2745561847418345) internal successors, (53344), 41853 states have internal predecessors, (53344), 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 02:17:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41854 states to 41854 states and 53344 transitions. [2022-11-03 02:17:02,941 INFO L78 Accepts]: Start accepts. Automaton has 41854 states and 53344 transitions. Word has length 329 [2022-11-03 02:17:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:02,942 INFO L495 AbstractCegarLoop]: Abstraction has 41854 states and 53344 transitions. [2022-11-03 02:17:02,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.384615384615385) internal successors, (374), 26 states have internal predecessors, (374), 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 02:17:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 41854 states and 53344 transitions. [2022-11-03 02:17:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:17:02,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:02,963 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 02:17:02,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (91)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:03,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-03 02:17:03,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:03,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:03,565 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:03,565 INFO L85 PathProgramCache]: Analyzing trace with hash -131942865, now seen corresponding path program 7 times [2022-11-03 02:17:03,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:03,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274964294] [2022-11-03 02:17:03,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:17:03,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:03,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:03,567 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:03,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-03 02:17:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:17:04,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:17:04,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:04,856 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:17:04,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:04,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274964294] [2022-11-03 02:17:04,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274964294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:04,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830933174] [2022-11-03 02:17:04,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:17:04,857 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:04,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:17:04,858 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:17:04,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-11-03 02:17:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:05,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:17:05,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-03 02:17:05,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:05,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [830933174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:05,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:17:05,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 02:17:05,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733849139] [2022-11-03 02:17:05,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:05,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:17:05,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:05,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:17:05,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:17:05,604 INFO L87 Difference]: Start difference. First operand 41854 states and 53344 transitions. Second operand has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 02:17:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:06,409 INFO L93 Difference]: Finished difference Result 109448 states and 140086 transitions. [2022-11-03 02:17:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:17:06,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 329 [2022-11-03 02:17:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:06,455 INFO L225 Difference]: With dead ends: 109448 [2022-11-03 02:17:06,455 INFO L226 Difference]: Without dead ends: 67676 [2022-11-03 02:17:06,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:17:06,469 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 395 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:06,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 545 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:17:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67676 states. [2022-11-03 02:17:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67676 to 42214. [2022-11-03 02:17:07,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42214 states, 42213 states have (on average 1.2732807428991069) internal successors, (53749), 42213 states have internal predecessors, (53749), 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 02:17:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42214 states to 42214 states and 53749 transitions. [2022-11-03 02:17:07,149 INFO L78 Accepts]: Start accepts. Automaton has 42214 states and 53749 transitions. Word has length 329 [2022-11-03 02:17:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:07,150 INFO L495 AbstractCegarLoop]: Abstraction has 42214 states and 53749 transitions. [2022-11-03 02:17:07,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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 02:17:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 42214 states and 53749 transitions. [2022-11-03 02:17:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:17:07,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:07,171 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:07,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (94)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:07,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-03 02:17:07,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:07,572 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:07,573 INFO L85 PathProgramCache]: Analyzing trace with hash 395451185, now seen corresponding path program 8 times [2022-11-03 02:17:07,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:07,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561669862] [2022-11-03 02:17:07,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:17:07,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:07,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:07,574 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:07,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-03 02:17:07,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:17:07,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:08,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:17:08,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:17:08,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:17:08,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:08,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561669862] [2022-11-03 02:17:08,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561669862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:08,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [207292749] [2022-11-03 02:17:08,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:17:08,860 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:08,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:17:08,860 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:17:08,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-03 02:17:09,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:17:09,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:09,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:17:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:09,890 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 362 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-03 02:17:09,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:09,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [207292749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:09,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:17:09,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 02:17:09,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783883863] [2022-11-03 02:17:09,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:09,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:17:09,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:09,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:17:09,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:17:09,892 INFO L87 Difference]: Start difference. First operand 42214 states and 53749 transitions. Second operand has 5 states, 5 states have (on average 43.8) internal successors, (219), 5 states have internal predecessors, (219), 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 02:17:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:10,988 INFO L93 Difference]: Finished difference Result 109988 states and 140626 transitions. [2022-11-03 02:17:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:17:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 5 states have internal predecessors, (219), 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 329 [2022-11-03 02:17:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:11,051 INFO L225 Difference]: With dead ends: 109988 [2022-11-03 02:17:11,051 INFO L226 Difference]: Without dead ends: 67856 [2022-11-03 02:17:11,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:17:11,076 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 394 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:11,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 544 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:17:11,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67856 states. [2022-11-03 02:17:11,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67856 to 42394. [2022-11-03 02:17:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42394 states, 42393 states have (on average 1.2721203972353927) internal successors, (53929), 42393 states have internal predecessors, (53929), 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 02:17:11,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42394 states to 42394 states and 53929 transitions. [2022-11-03 02:17:11,964 INFO L78 Accepts]: Start accepts. Automaton has 42394 states and 53929 transitions. Word has length 329 [2022-11-03 02:17:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:11,964 INFO L495 AbstractCegarLoop]: Abstraction has 42394 states and 53929 transitions. [2022-11-03 02:17:11,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 5 states have internal predecessors, (219), 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 02:17:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 42394 states and 53929 transitions. [2022-11-03 02:17:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:17:11,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:11,986 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:12,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-03 02:17:12,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (96)] Ended with exit code 0 [2022-11-03 02:17:12,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:12,387 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash 485511475, now seen corresponding path program 9 times [2022-11-03 02:17:12,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:12,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770117177] [2022-11-03 02:17:12,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:17:12,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:12,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:12,389 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:12,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-03 02:17:12,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:17:12,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:12,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:17:12,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-03 02:17:14,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:18,736 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-03 02:17:18,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:18,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770117177] [2022-11-03 02:17:18,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770117177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:18,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1451265377] [2022-11-03 02:17:18,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:17:18,737 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:18,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:17:18,738 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:17:18,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-03 02:17:19,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:17:19,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:17:19,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-03 02:17:21,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-03 02:17:25,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1451265377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:25,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306126216] [2022-11-03 02:17:25,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:17:25,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:25,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:25,058 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:25,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-03 02:17:25,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:17:25,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:25,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:17:25,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-03 02:17:27,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-03 02:17:31,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306126216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:31,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:17:31,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 22 [2022-11-03 02:17:31,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831230663] [2022-11-03 02:17:31,155 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:31,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 02:17:31,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:31,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 02:17:31,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:17:31,158 INFO L87 Difference]: Start difference. First operand 42394 states and 53929 transitions. Second operand has 22 states, 22 states have (on average 16.636363636363637) internal successors, (366), 22 states have internal predecessors, (366), 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 02:17:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:33,094 INFO L93 Difference]: Finished difference Result 94752 states and 120803 transitions. [2022-11-03 02:17:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:17:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 16.636363636363637) internal successors, (366), 22 states have internal predecessors, (366), 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 329 [2022-11-03 02:17:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:33,159 INFO L225 Difference]: With dead ends: 94752 [2022-11-03 02:17:33,159 INFO L226 Difference]: Without dead ends: 94750 [2022-11-03 02:17:33,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1988 GetRequests, 1946 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=391, Invalid=1331, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:17:33,178 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 917 mSDsluCounter, 4364 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 4762 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:33,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 4762 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 464 Invalid, 0 Unknown, 548 Unchecked, 0.5s Time] [2022-11-03 02:17:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94750 states. [2022-11-03 02:17:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94750 to 44670. [2022-11-03 02:17:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44670 states, 44669 states have (on average 1.2711052407710044) internal successors, (56779), 44669 states have internal predecessors, (56779), 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 02:17:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44670 states to 44670 states and 56779 transitions. [2022-11-03 02:17:34,214 INFO L78 Accepts]: Start accepts. Automaton has 44670 states and 56779 transitions. Word has length 329 [2022-11-03 02:17:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:34,214 INFO L495 AbstractCegarLoop]: Abstraction has 44670 states and 56779 transitions. [2022-11-03 02:17:34,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 16.636363636363637) internal successors, (366), 22 states have internal predecessors, (366), 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 02:17:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 44670 states and 56779 transitions. [2022-11-03 02:17:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:17:34,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:34,242 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:34,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:34,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (98)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:34,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-03 02:17:34,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:34,843 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:34,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1425531083, now seen corresponding path program 10 times [2022-11-03 02:17:34,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:34,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656616361] [2022-11-03 02:17:34,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:17:34,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:34,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:34,846 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:34,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-03 02:17:35,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:17:35,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:35,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:17:35,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:17:35,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:17:36,246 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:36,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656616361] [2022-11-03 02:17:36,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656616361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:36,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2017878536] [2022-11-03 02:17:36,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:17:36,246 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:36,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:17:36,247 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:17:36,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-03 02:17:36,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:17:36,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:36,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:17:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 366 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-03 02:17:37,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:37,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2017878536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:37,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:17:37,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 02:17:37,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894452283] [2022-11-03 02:17:37,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:37,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:17:37,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:17:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:17:37,022 INFO L87 Difference]: Start difference. First operand 44670 states and 56779 transitions. Second operand has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 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 02:17:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:37,519 INFO L93 Difference]: Finished difference Result 94124 states and 120546 transitions. [2022-11-03 02:17:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:17:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 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 329 [2022-11-03 02:17:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:37,557 INFO L225 Difference]: With dead ends: 94124 [2022-11-03 02:17:37,557 INFO L226 Difference]: Without dead ends: 49536 [2022-11-03 02:17:37,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:17:37,581 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 388 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:37,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 546 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:17:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49536 states. [2022-11-03 02:17:38,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49536 to 32873. [2022-11-03 02:17:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32873 states, 32872 states have (on average 1.2823679727427597) internal successors, (42154), 32872 states have internal predecessors, (42154), 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 02:17:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32873 states to 32873 states and 42154 transitions. [2022-11-03 02:17:38,187 INFO L78 Accepts]: Start accepts. Automaton has 32873 states and 42154 transitions. Word has length 329 [2022-11-03 02:17:38,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:38,187 INFO L495 AbstractCegarLoop]: Abstraction has 32873 states and 42154 transitions. [2022-11-03 02:17:38,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 5 states have internal predecessors, (220), 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 02:17:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 32873 states and 42154 transitions. [2022-11-03 02:17:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-11-03 02:17:38,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:38,204 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-11-03 02:17:38,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-03 02:17:38,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-11-03 02:17:38,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:38,604 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:38,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash -394361929, now seen corresponding path program 1 times [2022-11-03 02:17:38,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:38,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451307848] [2022-11-03 02:17:38,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:38,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:38,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:38,607 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:38,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-03 02:17:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:39,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:17:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:17:39,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 275 proven. 28 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-03 02:17:40,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451307848] [2022-11-03 02:17:40,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451307848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1107897606] [2022-11-03 02:17:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:40,110 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:40,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:17:40,111 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:17:40,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2022-11-03 02:17:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:40,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 1481 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:17:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-11-03 02:17:40,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:17:40,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1107897606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:17:40,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:17:40,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 02:17:40,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626200128] [2022-11-03 02:17:40,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:17:40,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:17:40,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:40,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:17:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:17:40,875 INFO L87 Difference]: Start difference. First operand 32873 states and 42154 transitions. Second operand has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 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 02:17:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:41,643 INFO L93 Difference]: Finished difference Result 78515 states and 100731 transitions. [2022-11-03 02:17:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:17:41,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 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) Word has length 329 [2022-11-03 02:17:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:41,682 INFO L225 Difference]: With dead ends: 78515 [2022-11-03 02:17:41,683 INFO L226 Difference]: Without dead ends: 45656 [2022-11-03 02:17:41,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 962 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:17:41,698 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 474 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:41,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 387 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:17:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45656 states. [2022-11-03 02:17:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45656 to 32873. [2022-11-03 02:17:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32873 states, 32872 states have (on average 1.2800559746897056) internal successors, (42078), 32872 states have internal predecessors, (42078), 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 02:17:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32873 states to 32873 states and 42078 transitions. [2022-11-03 02:17:42,261 INFO L78 Accepts]: Start accepts. Automaton has 32873 states and 42078 transitions. Word has length 329 [2022-11-03 02:17:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:42,261 INFO L495 AbstractCegarLoop]: Abstraction has 32873 states and 42078 transitions. [2022-11-03 02:17:42,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.8) internal successors, (184), 5 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 02:17:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 32873 states and 42078 transitions. [2022-11-03 02:17:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-03 02:17:42,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:42,289 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:42,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (103)] Ended with exit code 0 [2022-11-03 02:17:42,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:42,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:42,690 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:42,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:42,691 INFO L85 PathProgramCache]: Analyzing trace with hash -18024581, now seen corresponding path program 11 times [2022-11-03 02:17:42,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:42,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201080469] [2022-11-03 02:17:42,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:17:42,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:42,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:42,693 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:42,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-03 02:17:43,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:17:43,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:43,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:17:43,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 493 proven. 9 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 02:17:43,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 493 proven. 9 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 02:17:43,482 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:43,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201080469] [2022-11-03 02:17:43,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201080469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:43,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [61109775] [2022-11-03 02:17:43,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:17:43,483 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:43,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:17:43,486 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:17:43,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-03 02:17:44,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:17:44,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:44,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:17:44,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 493 proven. 9 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 02:17:44,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 493 proven. 9 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 02:17:44,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [61109775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:44,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797629725] [2022-11-03 02:17:44,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-03 02:17:44,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:44,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:44,515 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:44,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-03 02:17:44,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:17:44,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:44,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:17:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 493 proven. 9 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 02:17:44,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 493 proven. 9 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 02:17:45,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797629725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:45,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:17:45,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 13 [2022-11-03 02:17:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889660062] [2022-11-03 02:17:45,134 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:45,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:17:45,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:17:45,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:17:45,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:17:45,136 INFO L87 Difference]: Start difference. First operand 32873 states and 42078 transitions. Second operand has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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 02:17:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:46,632 INFO L93 Difference]: Finished difference Result 169023 states and 216650 transitions. [2022-11-03 02:17:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 02:17:46,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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 410 [2022-11-03 02:17:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:46,738 INFO L225 Difference]: With dead ends: 169023 [2022-11-03 02:17:46,738 INFO L226 Difference]: Without dead ends: 136228 [2022-11-03 02:17:46,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2480 GetRequests, 2447 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=755, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:17:46,766 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 1317 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:46,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1317 Valid, 1680 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-11-03 02:17:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136228 states. [2022-11-03 02:17:48,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136228 to 69234. [2022-11-03 02:17:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69234 states, 69233 states have (on average 1.2753455721982292) internal successors, (88296), 69233 states have internal predecessors, (88296), 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 02:17:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69234 states to 69234 states and 88296 transitions. [2022-11-03 02:17:48,604 INFO L78 Accepts]: Start accepts. Automaton has 69234 states and 88296 transitions. Word has length 410 [2022-11-03 02:17:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:48,604 INFO L495 AbstractCegarLoop]: Abstraction has 69234 states and 88296 transitions. [2022-11-03 02:17:48,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.307692307692307) internal successors, (251), 13 states have internal predecessors, (251), 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 02:17:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 69234 states and 88296 transitions. [2022-11-03 02:17:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-03 02:17:48,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:48,654 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:17:48,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:48,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (105)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:49,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:49,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:17:49,255 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1960891, now seen corresponding path program 12 times [2022-11-03 02:17:49,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:17:49,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267842102] [2022-11-03 02:17:49,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:17:49,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:17:49,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:17:49,258 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:17:49,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-03 02:17:49,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-03 02:17:49,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:49,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:17:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2022-11-03 02:17:52,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2022-11-03 02:17:56,550 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:17:56,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267842102] [2022-11-03 02:17:56,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267842102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:56,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [178385783] [2022-11-03 02:17:56,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:17:56,551 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:17:56,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:17:56,554 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:17:56,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-11-03 02:17:57,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-03 02:17:57,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:17:57,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:17:57,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2022-11-03 02:17:59,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2022-11-03 02:18:03,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [178385783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:03,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95155678] [2022-11-03 02:18:03,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-03 02:18:03,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:03,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:03,561 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:03,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-03 02:18:03,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-03 02:18:03,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:18:03,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:18:03,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2022-11-03 02:18:06,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2022-11-03 02:18:10,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95155678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:10,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:18:10,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 20 [2022-11-03 02:18:10,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579913884] [2022-11-03 02:18:10,212 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:10,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:18:10,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:10,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:18:10,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:18:10,213 INFO L87 Difference]: Start difference. First operand 69234 states and 88296 transitions. Second operand has 20 states, 20 states have (on average 19.3) internal successors, (386), 20 states have internal predecessors, (386), 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 02:18:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:12,823 INFO L93 Difference]: Finished difference Result 148056 states and 191019 transitions. [2022-11-03 02:18:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:18:12,823 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.3) internal successors, (386), 20 states have internal predecessors, (386), 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 410 [2022-11-03 02:18:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:12,932 INFO L225 Difference]: With dead ends: 148056 [2022-11-03 02:18:12,932 INFO L226 Difference]: Without dead ends: 148054 [2022-11-03 02:18:12,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2473 GetRequests, 2434 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=327, Invalid=1155, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:18:12,956 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 1090 mSDsluCounter, 2796 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:12,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1090 Valid, 3178 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 240 Unchecked, 0.3s Time] [2022-11-03 02:18:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148054 states. [2022-11-03 02:18:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148054 to 63674. [2022-11-03 02:18:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63674 states, 63673 states have (on average 1.2733183610007381) internal successors, (81076), 63673 states have internal predecessors, (81076), 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 02:18:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63674 states to 63674 states and 81076 transitions. [2022-11-03 02:18:14,312 INFO L78 Accepts]: Start accepts. Automaton has 63674 states and 81076 transitions. Word has length 410 [2022-11-03 02:18:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:14,313 INFO L495 AbstractCegarLoop]: Abstraction has 63674 states and 81076 transitions. [2022-11-03 02:18:14,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.3) internal successors, (386), 20 states have internal predecessors, (386), 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 02:18:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 63674 states and 81076 transitions. [2022-11-03 02:18:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-03 02:18:14,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:14,360 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:14,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (108)] Ended with exit code 0 [2022-11-03 02:18:14,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-03 02:18:14,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:14,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:14,961 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:14,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:14,962 INFO L85 PathProgramCache]: Analyzing trace with hash -354277313, now seen corresponding path program 13 times [2022-11-03 02:18:14,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:14,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553015451] [2022-11-03 02:18:14,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:18:14,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:14,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:14,964 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:14,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-03 02:18:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:15,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:18:15,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 384 proven. 28 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-11-03 02:18:15,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 384 proven. 28 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-11-03 02:18:16,511 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:16,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553015451] [2022-11-03 02:18:16,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553015451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:16,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1984922711] [2022-11-03 02:18:16,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:18:16,511 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:18:16,512 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:18:16,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-11-03 02:18:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:17,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:18:17,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 451 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-11-03 02:18:17,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:17,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1984922711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:17,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:18:17,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 13] total 27 [2022-11-03 02:18:17,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42704838] [2022-11-03 02:18:17,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:17,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:18:17,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:18:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:18:17,393 INFO L87 Difference]: Start difference. First operand 63674 states and 81076 transitions. Second operand has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 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 02:18:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:18,704 INFO L93 Difference]: Finished difference Result 142086 states and 181729 transitions. [2022-11-03 02:18:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:18:18,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 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 410 [2022-11-03 02:18:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:18,756 INFO L225 Difference]: With dead ends: 142086 [2022-11-03 02:18:18,756 INFO L226 Difference]: Without dead ends: 90880 [2022-11-03 02:18:18,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1232 GetRequests, 1204 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:18:18,774 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 304 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:18,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 623 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:18:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90880 states. [2022-11-03 02:18:20,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90880 to 63930. [2022-11-03 02:18:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63930 states, 63929 states have (on average 1.2672183203241096) internal successors, (81012), 63929 states have internal predecessors, (81012), 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 02:18:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63930 states to 63930 states and 81012 transitions. [2022-11-03 02:18:20,197 INFO L78 Accepts]: Start accepts. Automaton has 63930 states and 81012 transitions. Word has length 410 [2022-11-03 02:18:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:20,197 INFO L495 AbstractCegarLoop]: Abstraction has 63930 states and 81012 transitions. [2022-11-03 02:18:20,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.6) internal successors, (193), 5 states have internal predecessors, (193), 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 02:18:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 63930 states and 81012 transitions. [2022-11-03 02:18:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-03 02:18:20,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:20,216 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:20,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (111)] Ended with exit code 0 [2022-11-03 02:18:20,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-03 02:18:20,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:18:20,617 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:20,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2011093111, now seen corresponding path program 1 times [2022-11-03 02:18:20,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:20,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346434940] [2022-11-03 02:18:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:20,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:20,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:20,619 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:20,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-03 02:18:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:18:21,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 384 proven. 28 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-11-03 02:18:21,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 384 proven. 28 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-11-03 02:18:22,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:22,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346434940] [2022-11-03 02:18:22,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346434940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:22,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1771129670] [2022-11-03 02:18:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:22,151 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:18:22,152 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:18:22,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-03 02:18:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:18:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 492 proven. 100 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-11-03 02:18:23,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 492 proven. 100 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-11-03 02:18:24,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1771129670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:24,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485830904] [2022-11-03 02:18:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:24,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:24,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:24,287 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:24,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-03 02:18:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:18:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 496 proven. 6 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 02:18:25,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 492 proven. 18 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-11-03 02:18:25,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485830904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:25,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:18:25,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8, 8, 7, 8] total 40 [2022-11-03 02:18:25,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194864771] [2022-11-03 02:18:25,613 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:25,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:18:25,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:25,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:18:25,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:18:25,615 INFO L87 Difference]: Start difference. First operand 63930 states and 81012 transitions. Second operand has 40 states, 40 states have (on average 16.3) internal successors, (652), 40 states have internal predecessors, (652), 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 02:18:40,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:40,303 INFO L93 Difference]: Finished difference Result 195397 states and 248615 transitions. [2022-11-03 02:18:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-11-03 02:18:40,304 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 16.3) internal successors, (652), 40 states have internal predecessors, (652), 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 410 [2022-11-03 02:18:40,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:40,388 INFO L225 Difference]: With dead ends: 195397 [2022-11-03 02:18:40,389 INFO L226 Difference]: Without dead ends: 131545 [2022-11-03 02:18:40,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2650 GetRequests, 2415 SyntacticMatches, 1 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19446 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=6255, Invalid=49205, Unknown=0, NotChecked=0, Total=55460 [2022-11-03 02:18:40,415 INFO L413 NwaCegarLoop]: 877 mSDtfsCounter, 14558 mSDsluCounter, 16901 mSDsCounter, 0 mSdLazyCounter, 4790 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14558 SdHoareTripleChecker+Valid, 17778 SdHoareTripleChecker+Invalid, 5481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 4790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:40,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14558 Valid, 17778 Invalid, 5481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 4790 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-03 02:18:40,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131545 states. [2022-11-03 02:18:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131545 to 39058. [2022-11-03 02:18:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39058 states, 39057 states have (on average 1.2562664823207108) internal successors, (49066), 39057 states have internal predecessors, (49066), 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 02:18:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39058 states to 39058 states and 49066 transitions. [2022-11-03 02:18:41,772 INFO L78 Accepts]: Start accepts. Automaton has 39058 states and 49066 transitions. Word has length 410 [2022-11-03 02:18:41,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:41,772 INFO L495 AbstractCegarLoop]: Abstraction has 39058 states and 49066 transitions. [2022-11-03 02:18:41,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 16.3) internal successors, (652), 40 states have internal predecessors, (652), 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 02:18:41,772 INFO L276 IsEmpty]: Start isEmpty. Operand 39058 states and 49066 transitions. [2022-11-03 02:18:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-03 02:18:41,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:41,778 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:41,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-03 02:18:42,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (113)] Ended with exit code 0 [2022-11-03 02:18:42,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:42,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:42,379 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:42,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1889544145, now seen corresponding path program 1 times [2022-11-03 02:18:42,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:42,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050840369] [2022-11-03 02:18:42,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:42,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:42,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:42,381 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:42,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-03 02:18:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:42,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:18:42,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 372 proven. 22 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2022-11-03 02:18:43,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 372 proven. 22 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2022-11-03 02:18:43,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:43,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050840369] [2022-11-03 02:18:43,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050840369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:43,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1469703004] [2022-11-03 02:18:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:43,857 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:43,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:18:43,858 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:18:43,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-03 02:18:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:44,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:18:44,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 376 proven. 24 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-03 02:18:45,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 376 proven. 24 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-03 02:18:45,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1469703004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:45,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481403607] [2022-11-03 02:18:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:45,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:45,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:45,656 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:45,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-03 02:18:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:46,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:18:46,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 376 proven. 24 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-03 02:18:46,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:18:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 376 proven. 24 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-03 02:18:46,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481403607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:18:46,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:18:46,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12, 12, 13, 12] total 40 [2022-11-03 02:18:46,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041418874] [2022-11-03 02:18:46,699 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:46,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:18:46,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:18:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:18:46,701 INFO L87 Difference]: Start difference. First operand 39058 states and 49066 transitions. Second operand has 40 states, 40 states have (on average 10.625) internal successors, (425), 40 states have internal predecessors, (425), 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 02:18:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:53,589 INFO L93 Difference]: Finished difference Result 236378 states and 295098 transitions. [2022-11-03 02:18:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:18:53,590 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 10.625) internal successors, (425), 40 states have internal predecessors, (425), 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 410 [2022-11-03 02:18:53,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:53,729 INFO L225 Difference]: With dead ends: 236378 [2022-11-03 02:18:53,729 INFO L226 Difference]: Without dead ends: 197398 [2022-11-03 02:18:53,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2490 GetRequests, 2416 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1092, Invalid=4608, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 02:18:53,758 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 3691 mSDsluCounter, 4391 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3691 SdHoareTripleChecker+Valid, 4514 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:53,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3691 Valid, 4514 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:18:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197398 states. [2022-11-03 02:18:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197398 to 64368. [2022-11-03 02:18:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64368 states, 64367 states have (on average 1.248978513834729) internal successors, (80393), 64367 states have internal predecessors, (80393), 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 02:18:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64368 states to 64368 states and 80393 transitions. [2022-11-03 02:18:56,323 INFO L78 Accepts]: Start accepts. Automaton has 64368 states and 80393 transitions. Word has length 410 [2022-11-03 02:18:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:56,323 INFO L495 AbstractCegarLoop]: Abstraction has 64368 states and 80393 transitions. [2022-11-03 02:18:56,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 10.625) internal successors, (425), 40 states have internal predecessors, (425), 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 02:18:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 64368 states and 80393 transitions. [2022-11-03 02:18:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-11-03 02:18:56,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:56,334 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:18:56,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-11-03 02:18:56,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-03 02:18:56,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (116)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:56,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:18:56,935 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:56,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1775917263, now seen corresponding path program 1 times [2022-11-03 02:18:56,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:18:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38808791] [2022-11-03 02:18:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:56,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:18:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:18:56,938 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:18:56,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1314e9a-2acd-44ee-b0dc-7f213fb8062e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-03 02:18:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:18:57,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 738 trivial. 0 not checked. [2022-11-03 02:18:57,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:18:57,498 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:18:57,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38808791] [2022-11-03 02:18:57,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38808791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:57,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:57,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:18:57,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854306472] [2022-11-03 02:18:57,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:57,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:18:57,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:18:57,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:18:57,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:18:57,500 INFO L87 Difference]: Start difference. First operand 64368 states and 80393 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:00,064 INFO L93 Difference]: Finished difference Result 166667 states and 208343 transitions. [2022-11-03 02:19:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:19:00,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 410 [2022-11-03 02:19:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:00,130 INFO L225 Difference]: With dead ends: 166667 [2022-11-03 02:19:00,130 INFO L226 Difference]: Without dead ends: 102377 [2022-11-03 02:19:00,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 407 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 02:19:00,147 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 251 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:00,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 380 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:19:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102377 states.